Subtle modifications to the aluminum frame and suspension mean light, precise, confident handling. New head and exhaust design delivers stronger low- to midrange power without sacrificing top end power.
ProTaper aluminum handlebar in adjustable clamps, titanium shock spring, gripper seat, Excel rims, etc.
Five-speed gearbox provides maximum flexibility and the right gear for a wide range of riding environments.
New for 2008:
Revised intake port shapes, and revised intake and exhaust cam profiles increase combustion efficiency for improved torque and throttle response in the low- to mid-rpm range.
Micron-level adjustment of piston external diameter minimizes piston-to-cylinder clearance for reduced vibration and mechanical noise. Adjustment of gear backlash between clutch primary gears and balancer gears achieves further mechanical noise reduction.
A new, larger-diameter titanium exhaust header with revised taper characteristics enhances exhaust efficiency. First “punched cone” muffler ever on a production bike allows 35 percent length reduction and 270-gram weight reduction while meeting AMA noise regulations.
Matte black crankcase covers: light, strong and cool-looking. Steering head pipe and steering stem are 5mm shorter; lower forged triple steering clamp is lighter—for enhanced handling feel. Swingarm pivot stiffness is revised to complement front-end changes and further lighten and improve steering/handling.
Changes to the shape of the outer fork tubes and revised internals result in improved damping and a smoother ride. Optimized linkage ratio provides a smoother ride and enhanced rear wheel traction.
New, YZ250F-style, front-brake caliper (-220 grams) and a lighter disc remove unsprung weight and provide excellent stopping power. A new axle and collar remove additional weight.
A 120/80-19 rear Dunlop D756 knobby replaces the 110/90-19 for even more traction. A D742FA replaces the D739FAL front tire. Wider footpegs provide excellent boot traction and rider comfort.
Engine:
449cc five-valve DOHC liquid-cooled engine is super-powerful yet tractable. 39mm Keihin FCR flat-slide carburetor with throttle position sensor (TPS) and leak jet delivers precise fuel/air mixture and instant throttle response. Lightweight titanium valves and load-reduced springs minimize reciprocating mass for fast-revving, hard-hitting power delivery across the rev range. Primary kickstarting with automatic decompression and convenient, handlebar-mounted hot start lever ensures easy restarts. Large-capacity radiator is reinforced for greater strength.
Chassis/Suspension:
Extensively tested aluminum frame uses a mix of alloy castings, forgings and extrusions to produce a tuned-flex frame that makes the YZ the finest-handling motocross bike ever. Speed-Sensitive System 48mm Kayaba fork places transfer control valves (TCV) above the fork springs, so that damping force is controlled by piston speed: Eliminating mid-stroke damping force changes provides a smoother, more precise ride. Titanium-sprung, four-way adjustable rear shock with Kashima-coated internals reduces friction for fantastic compliance and great handling. More weight savings come via two-piece (part aluminum, part plastic) engine protector plates and thin-walled engine guard construction. Removable aluminum rear subframe constructed of square-section tubing for light weight and easy maintenance. Lightweight front-wheel hub for reduced unsprung weight and increased durability. Lightweight front- and rear-brake calipers with aluminum pistons and anti-bubble front master cylinder; wave-style rotors reduce unsprung weight and deliver strong stopping power.
Additional Features:
“Gripper” style seat cover gives excellent feel and control. ProTaper aluminum handlebar for strength and performance. Works-style clutch lever features oversize barrel adjuster for easy, on-the-fly adjustability of lever/cable play. Repackable exhaust silencer. Durable, comfortable handlebar grips.
2008 YZ450F
MSRP*
$7,099 (Team Yamaha Blue/White) Available from July 2007 $7,199 (White/Red) Available from July 2007
Speed-Sensitive System inverted fork; fully adjustable, 11.8-in travel
Suspension/Rear
Fully adjustable single shock; 12.3-in travel
Brakes/Front
Hydraulic single disc brake, 250mm
Brakes/Rear
Hydraulic single disc brake, 245mm
Tires/Front
80/100-21-51M
Tires/Rear
120/80-19-62M
Dimensions
Length
86.4 in
Width
32.5 in
Height
51.4 in
Seat Height
38.9 in
Wheelbase
58.8 in
Ground Clearance
14.7 in
Dry Weight
219 lb
Fuel Capacity
1.8 gal
Other
Warranty
30 Day (Limited Factory Warranty)
2008 YZ250
Key Features:
Our legendary two-stroke Supercross winner is more potent than ever. 610 grams off the front end makes this the quickest turning, best-handling YZ250 ever. A light, aluminum frame housing a patented YPVS™ Power valve-equipped ripper of an engine results in an awesome power-to-weight ratio. Ready to race out-of-the-crate, complete with a ProTaper aluminum handlebar, titanium footpegs, gripper seat and Excel rims.
Engine:
249cc liquid-cooled reed-valve-inducted two-stroke engine is lightweight, compact and features an incredibly wide, hard-hitting powerband. Patented YPVS™ power-valve system combines crisp, hard-hitting, bottom-end acceleration with strong midrange and eye-opening top-end. Special-design carbon fiber reed-valve petals improve throttle response and engine performance across the entire rpm range. Smooth-shifting, five-speed, close-ratio transmission with heavy-duty, multiplate clutch. Primary kickstarter ensures smooth, easy starting action and reduced weight. Large-capacity radiator features a ten-row core with four louvers for maximum cooling efficiency. 38mm Keihin PWK carburetor with power jet and throttle position sensor (TPS) ensures precise fuel/air mixing and extra-crisp throttle response throughout the powerband. Digital CDI ignition system delivers precise spark for faster, stronger response anywhere in the powerband. Trick, works-style clutch lever features race-spec barrel adjuster for on-the-fly adjustability.
Chassis/Suspension:
A carefully engineered, advanced aluminum frame and swingarm give the YZ250 the best handling in the 250 class. Speed-Sensitive System 48mm Kayaba fork tubes move the transfer control valves (TCV) above the fork springs, so that damping force is controlled by piston speed instead of position. Along with a bigger base valve hole, the result is a smooth ride and super-precise handling. Removable aluminum rear subframe constructed of square-section tubing for reduced weight. Rear, fully adjustable Kayaba shock features a super-light titanium shock spring and reduced-friction Kashima coating of internals. 12.4 inches of travel, separate adjusters for high- and low-speed compression damping, and a full lock oil rebound system for increased comfort all add up to fantastic rear wheel control and a sweet ride. Lightweight front and rear calipers with aluminum pistons and anti-bubble front master cylinder, 250mm fully floating front and 245mm rear discs, deliver strong stopping power with progressive feel. Lightweight 21-inch front and 19-inch rear Excel rims provide exceptional durability and help reduce unsprung weight for optimal suspension performance and handling. Tapered rear wheel spacers ease sliding the rear wheel into place for quicker tire changes. Premium Dunlop knobbies offer race-spec traction and wear.
Additional Features:
Wide, cleated, folding titanium footpegs are lightweight and provide excellent comfort, grip and ground clearance. Special-design “gripper” type seat and fuel tank, forward-canted steering crown and low handlebar provide excellent movement and more comfortable ergonomics for riders. Wide-diameter fuel tank cap ensures easier usage, while larger tank opening means faster, hassle-free refueling. A light and strong ProTaper aluminum handlebar in adjustable mounts means comfort and control. Use of light, box-head bolts throughout the chassis eases maintenance while reducing weight and increasing performance. Repackable exhaust silencer. Durable, comfortable handlebar grips.
2008 YZ250
MSRP*
$6,399 (Team Yamaha Blue/White)
Engine
Type
249cc liquid-cooled 2-stroke; reed-valve inducted
Bore x Stroke
66.4 x 72.0mm
Compression Ratio
9.2 – 10.9:1
Carburetion
PWK38S X 1
Ignition
CDI
Transmission
Constant-mesh 5-speed; multiplate wet clutch
Final Drive
Chain Drive
Chassis
Suspension/Front
Speed-Sensitive System inverted fork; fully adjustable, 11.8-in travel
Suspension/Rear
Fully adjustable single shock, 12.4-in travel
Brakes/Front
Hydraulic single disc brake, 250mm
Brakes/Rear
Hydraulic single disc brake, 245mm
Tires/Front
80/100-21-51M
Tires/Rear
110/90-19-62M
Dimensions
Length
85.7 in
Width
32.6 in
Height
51.4 in
Seat Height
39.1 in
Wheelbase
58.3 in
Ground Clearance
15.0 in
Dry Weight
212 lb
Fuel Capacity
2.1 gal
Other
Warranty
30 Day (Limited Factory Warranty)
2008 YZ250F
Key Features:
Ongoing refinement to chassis and engine produce an amazingly balanced, light-handling machine with performance that's accessible to all levels of riders. Five-titanium-valve engine with increased compression spins out even more torque and horsepower. A carefully tuned aluminum frame made up of forgings, weldings, castings and tubing means sharp, super-precise handling. Mass centralization provides fantastic overall balance and performance. A ProTaper aluminum handlebar in adjustable clamps, Excel rims and a titanium shock spring are just a few tricks up the YZ250F’s sleeve.
New for 2008:
A redesigned piston bumps compression ratio from 12.5:1 to 13.5:1, further exploiting the inherent efficiency of the five-valve combustion chamber. Carburetion and ignition revisions complement the increased compression. Adjustment of gear backlash between clutch primary gears and balancer gears reduces mechanical noise. Changes to the clutch boss and primary driven gear improve clutch oiling for excellent durability.
Matte black crankcase covers: light and cool-looking. Changes to the shape of the outer fork tubes and lower triple clamp, and revised fork internals, result in excellent handling, great damping and a smooth ride. Optimized linkage ratio provides a smoother ride and enhanced rear wheel traction. 55mm stainless steel footpegs replace 45mm ones for great grip and comfort, and a new brake pedal eases operation. Grippy new Bridgestone knobbies front and rear.
Engine:
Liquid-cooled 250cc, five-titanium-valved, DOHC, four-stroke is powerful and highly tractable, with an rpm redline for competition-crushing pulling power. 37mm Keihin FCR flat-slide carburetor with throttle position sensor (TPS) ensures precise fuel/air mixing and lightning-quick throttle response. CDI ignition provides a hot, consistent spark across the powerband for right-now throttle response. Lightweight, titanium header pipe (with titanium heat shield) flows into an aluminum silencer for maximum power. Cylinder body and crankcase feature a large cutaway section to reduce pumping loss and increase midrange performance. Primary kickstarting (with automatic decompression and convenient handlebar-mounted hot start lever) ensures easy restarts. Slick, five-speed transmission with heavy-duty, multiplate clutch features an involute spline setup, ensuring smooth shifting and instant hookup under power. Magnesium cylinder head cover helps shave weight. Trick, works-style clutch lever features race-spec barrel adjuster for on-the-fly adjustability.
Chassis/Suspension:
Extensively tested aluminum frame uses a mix of alloy castings, forgings and extrusions to produce a tuned-flex frame that makes the YZ250F the best-handling bike in its class. Speed-Sensitive System 48mm Kayaba fork places transfer control valves (TCV) above the fork springs, so that damping force is controlled by piston speed: Eliminating mid-stroke damping force changes provides a smoother, more precise ride. Titanium-sprung, four-way adjustable, rear shock with Kashima-coated internals reduces friction for fantastic compliance and great handling. Removable aluminum rear subframe is constructed of square-section tubing for light weight and easy maintenance. Lightweight front wheel hub for reduced unsprung weight and increased durability. Lightweight front and rear brake calipers with aluminum pistons and anti-bubble front master cylinder; new wave-style rotors reduce unsprung weight and deliver strong stopping power. Lightweight 21-inch front and 19-inch rear Excel rims are exceptionally durable and reduce unsprung weight.
Additional Features:
“Gripper” style seat cover offers excellent feel and control. ProTaper handlebar with durable, comfortable
2008 YZ250F
MSRP*
$6,249 (Team Yamaha Blue/White) Available from June 2007 $6,349 (White/Red) Available from June 2007
Speed-Sensitive System inverted fork; fully adjustable, 11.8-in travel
Suspension/Rear
Fully adjustable single shock; 12.0-in travel
Brakes/Front
Hydraulic single disc brake, 250mm
Brakes/Rear
Hydraulic single disc brake, 245mm
Tires/Front
80/100-21-51M
Tires/Rear
100/90-19-57M
Dimensions
Length
85.1 in
Width
32.5 in
Height
51.2 in
Seat Height
38.8 in
Wheelbase
57.8 in
Ground Clearance
14.6 in
Dry Weight
204 lb
Fuel Capacity
1.8 gal
Other
Warranty
30 Day (Limited Factory Warranty)
2008 YZ125
Key Features:
A light, aluminum frame housing an amazingly light and compact engine results in an awesome power-to-weight ratio. 610 grams off the front end makes this the quickest turning, best-handling YZ125 ever. Ready to race out-of-the-crate, complete with a ProTaper aluminum handlebar, titanium footpegs and gripper seat. A pure motocross machine, the light and nimble YZ125 is the perfect choice for riders stepping up from the 85cc class.
Engine:
Amazingly compact 124cc reed-valve-inducted two-stroke helps produce an awesome power-to-weight ratio. Patented YPVS™ power-valve system combines crisp, hard-hitting bottom-end acceleration with strong midrange and eye-opening top end. 38mm Mikuni TMX carburetor gives excellent throttle response and serious horsepower. Six-speed, close-ratio transmission optimizes gear ratios for maximum performance. Digital CDI ignition system delivers precise spark and monitors engine speed to ensure optimal timing for faster, stronger response during hard acceleration. Large-capacity radiator features a 10-row core with four louvers to deliver maximum cooling efficiency at all performance levels. Primary kickstarting ensures easy restarts in any gear. Trick, works-style clutch lever features race-spec barrel adjuster for on-the-fly adjustability.
Chassis/Suspension:
A carefully engineered, advanced aluminum frame and swingarm give the YZ125 the best handling in the class. Speed-Sensitive System 48mm Kayaba fork tubes move the transfer control valves (TCV) above the fork springs, so that damping force is controlled by piston speed instead of position. Along with a bigger base valve hole, the result is a smooth ride and super-precise handling. Removable aluminum rear subframe constructed of square-section tubing for reduced weight. Rear, fully adjustable Kayaba shock features a super-light titanium shock spring and reduced-friction Kashima coating of internals. 12.4 inches of travel, separate adjusters for high- and low-speed compression damping, and a full lock oil rebound system for increased comfort all add up to fantastic rear wheel control and a sweet ride. Lightweight front and rear calipers with aluminum pistons and anti-bubble front master cylinder, 250mm floating front and 245mm rear discs, deliver strong stopping power with progressive feel. Tapered rear wheel spacers ease sliding the rear wheel into place for quicker tire changes. Premium Dunlop knobbies offer race-spec traction and wear.
Additional Features:
Special-design “gripper” type seat and fuel tank, forward-canted steering crown and low ProTaper handlebar all help create greater freedom of movement and more comfortable ergonomics for riders. Wide, cleated, folding titanium footpegs are lightweight and provide excellent comfort, grip and ground clearance. Use of light, box-head bolts throughout the chassis eases maintenance while reducing weight for increased performance. Wide-diameter fuel tank cap for easier refueling. Repackable exhaust silencer. Durable, comfortable handlebar grips.
2008 YZ125
MSRP*
$5,599 (Team Yamaha Blue/White) Available from August 2007
Speed-sensitive system inverted fork; fully adjustable, 11.8-in travel
Suspension/Rear
Fully adjustable single shock; 12.4-in travel
Brakes/Front
Hydraulic single disc brake, 250mm
Brakes/Rear
Hydraulic single disc brake, 245mm
Tires/Front
80/100-21-51M
Tires/Rear
100/90-19-57M
Dimensions
Length
84.1 in
Width
32.6 in
Height
51.8 in
Seat Height
39.3 in
Wheelbase
56.8 in
Ground Clearance
15.2 in
Dry Weight
190 lb
Fuel Capacity
2.1 gal
Other
Warranty
30 Day (Limited Factory Warranty)
2008 YZ85
Key Features:
Liquid-cooled, 85cc crankcase reed-valve inducted six-speed is light, compact and designed to deliver hard-hitting, moto-winning power throughout the rpm range. Ultra-rigid, single backbone, semi-double cradle steel frame is lightweight and strong for sharp handling. Fully adjustable suspension allows a broad adjustment range to suit everybody from rank novice to mini expert.
Engine:
85cc liquid-cooled, crankcase reed-valve-inducted, two-stroke engine inhales through a 28mm Keihin flat-slide carburetor; seamless throttle response across the powerband is the result. Digital CDI ignition system puts out a more precise spark and monitors engine speed to ensure optimal timing for quicker, stronger response during hard acceleration. Smooth-shifting, six-speed close ratio transmission with heavy-duty, multiplate clutch delivers maximum hook-up for outstanding acceleration and corner-exiting power. Involute spline set-up in clutch means smoother shifting under power with great durability at competition-level usage. Two-piece clutch cover for easy access during maintenance. Lightweight radiator has large cores and louvers, and the water pump features a cast aluminum impeller for maximum cooling efficiency. Lightweight exhaust system design helps create a broader powerband with stronger low-end punch. Airbox design ensures greater air cleaning performance and easier maintenance.
Chassis/Suspension:
Rear subframe is removable to allow easy maintenance. Lightweight 36mm Kayaba inverted cartridge fork features 10.8 inches of travel with compression and rebound damping adjustability, and low-friction outer tubes and internals. Rear suspension features fully adjustable Kayaba link-type shock with 11.1 inches of travel and race-tested compression damping valving. 220mm front disc and 190mm rear disc brakes with stainless steel rotors deliver strong, precise stopping power. Lightweight 17-inch front and 14-inch rear rims are durable and reduce unsprung weight for optimal suspension performance. Dunlop knobbies for great traction on a variety of tracks and terrain.
Additional Features:
Wide handlebar and flat fuel tank, radiator shrouds, side panels and rear fender provide rider with leverage and freedom of movement and weight transfer. Wide, footpegs are cleated to provide superb comfort, grip and ground clearance. Separate clutch cover with transmission oil filler opening makes for easy maintenance. Fuel tank cap is wider-diameter for easier usage and large tank opening ensures fast, hassle-free refueling. Repackable exhaust silencer. Durable, comfortable handlebar grips.
2008 YZ85
Key Features:
Liquid-cooled, 85cc crankcase reed-valve inducted six-speed is light, compact and designed to deliver hard-hitting, moto-winning power throughout the rpm range. Ultra-rigid, single backbone, semi-double cradle steel frame is lightweight and strong for sharp handling. Fully adjustable suspension allows a broad adjustment range to suit everybody from rank novice to mini expert.
Engine:
85cc liquid-cooled, crankcase reed-valve-inducted, two-stroke engine inhales through a 28mm Keihin flat-slide carburetor; seamless throttle response across the powerband is the result. Digital CDI ignition system puts out a more precise spark and monitors engine speed to ensure optimal timing for quicker, stronger response during hard acceleration. Smooth-shifting, six-speed close ratio transmission with heavy-duty, multiplate clutch delivers maximum hook-up for outstanding acceleration and corner-exiting power. Involute spline set-up in clutch means smoother shifting under power with great durability at competition-level usage. Two-piece clutch cover for easy access during maintenance. Lightweight radiator has large cores and louvers, and the water pump features a cast aluminum impeller for maximum cooling efficiency. Lightweight exhaust system design helps create a broader powerband with stronger low-end punch. Airbox design ensures greater air cleaning performance and easier maintenance.
Chassis/Suspension:
Rear subframe is removable to allow easy maintenance. Lightweight 36mm Kayaba inverted cartridge fork features 10.8 inches of travel with compression and rebound damping adjustability, and low-friction outer tubes and internals. Rear suspension features fully adjustable Kayaba link-type shock with 11.1 inches of travel and race-tested compression damping valving. 220mm front disc and 190mm rear disc brakes with stainless steel rotors deliver strong, precise stopping power. Lightweight 17-inch front and 14-inch rear rims are durable and reduce unsprung weight for optimal suspension performance. Dunlop knobbies for great traction on a variety of tracks and terrain.
Additional Features:
Wide handlebar and flat fuel tank, radiator shrouds, side panels and rear fender provide rider with leverage and freedom of movement and weight transfer. Wide, footpegs are cleated to provide superb comfort, grip and ground clearance. Separate clutch cover with transmission oil filler opening makes for easy maintenance. Fuel tank cap is wider-diameter for easier usage and large tank opening ensures fast, hassle-free refueling. Repackable exhaust silencer. Durable, comfortable handlebar grips.
2008 WR450F
Key Features:
A YZ-bred advanced aluminum frame—carefully engineered from castings, forgings and extrusions—enhances handling while retaining legendary Yamaha feel and characteristics. Highly evolved five-titanium-valved engine starts with the push of a button. Cool digital enduro computer offers speedometer, clock, tripmeter, etc., in basic mode—or pace management functions such as timer, distance-compensating tripmeter, average speed, etc., when switched to race mode. The WR450F is green sticker approved for California.
Engine:
449cc liquid-cooled DOHC four-stroke with five titanium valves delivers more broad power than ever, with high over-rev capacity and crisp, linear throttle response. Special camshafts, carburetion, intake ports, exhaust, etc., all work together to produce an engine with mind-boggling low- and midrange power. Special crank balance factor and AC generator provide super-smooth running. A piston oil-jet provides increased cooling for long life. Dry-sump lubrication system carries the oil reservoir inside the engine cases, for excellent mass centralization and simplified plumbing. 39mm Keihin FCR flat-slide carburetor with throttle position sensor (TPS) produces ultra-precise fuel/air mixing and lightning-quick throttle response. “No tools” airbox uses hinge-type quick-open lid. Battery rides low for excellent handling. Digital CDI ignition system delivers more precise spark and monitors engine speed to ensure optimal timing for fast, strong response during hard acceleration. Large-capacity radiators with reinforcements ensure maximum cooling efficiency with great strength. Wide-ratio five-speed transmission uses strengthened gears and YZ450F-spec multiplate clutch—good for quick-hitting power in the woods as well as eye-opening top-end power. Lightweight exhaust system maximizes engine power and allows hassle-free replacement of oil filter. Aluminum muffler with USFS-approved spark arrestor looks trick and keeps things light. Works-style clutch lever features oversize barrel adjuster for easy, on-the-fly adjustability of lever/cable play. Electric start ensures easy restarts.
Chassis/Suspension:
YZ-inspired aluminum frame helps reduce weight while optimizing mass centralization. An extensively tested assembly of aluminum forgings, castings and extrusions, the WR frame retains legendary Yamaha handling and response. Removable aluminum rear subframe is constructed of square-section tube for reduced weight. Fully adjustable air-/oil-separate 48mm cartridge-type fork delivers precise, fade-free handling; fork protectors provide excellent tube protection. Tapered swingarm adopts YZ-style linkage for controlled, compliant rear suspension action. Lightweight axle and holders reduce weight in a critical area. The Kayaba shock provides 12.0 inches of travel with adjusters for high- and low-speed compression damping, rebound and spring preload—and features a larger piggyback reservoir for excellent damping and fade resistance. Wave-type brake discs reduce unsprung weight and provide excellent performance. Front and rear calipers with aluminum pistons deliver strong stopping power with progressive feel. Lightweight 21-inch front and 18-inch rear Excel rims provide exceptional durability and help reduce unsprung weight for optimal suspension performance. Premium Dunlop knobbies offer unbeatable, competition-spec traction and excellent wear.
Additional Features:
Cool YZ-derived bodywork and a thick seat look great and feel excellent on long rides. ProTaper aluminum handlebar in forged triple clamp for light weight and great comfort. Slim-design lightweight fuel tank holds 2.1 gallons. One-piece, high-strength, plastic skid plate shaves weight and offers great protection. Lightweight, 35-watt headlight and sweet LED taillight maximize visibility and draw less current. Adjustable front brake lever. Ultra-wide footpegs for more comfort. Repackable aluminum muffler shaves weight. Front wheel collar makes front wheel removal quick and easy.
2008 WR450F
MSRP*
$7,199 (Team Yamaha Blue/White) Available from August 2007
YZ-bred advanced aluminum frame—carefully engineered from castings, forgings and extrusions enhances handling while retaining legendary Yamaha feel and characteristics. Highly evolved high-revving five-titanium-valved engine starts with the push of a button. Cool digital enduro computer offers speedometer, clock, tripmeter, etc., in basic mode or pace management functions such as timer, distance-compensating tripmeter, average speed, etc., when switched to race mode. The WR250F is green sticker approved for California.
New for 2008:
New 6Ah battery (up from 4Ah) for more cranking power. A fluorination treatment of the plastic fuel tank reduces gas permeation — good for the environment and the EPA — and new, FKM breather and fuel hoses accomplish the same thing. A 120-gram-lighter fork protector, lighter axle and axle bracket, lighter wheel collar and the new front brake add up to a 500-gram-lighter front end, and even quicker, lighter handling. New-shaped lightweight brake pedal for enhanced performance and feel.
Engine:
249cc liquid-cooled, DOHC four-stroke with five titanium valves delivers excellent low- and midrange power, with high over-rev capacity and crisp, linear throttle response. Special WR camshafts, carburetion and TPS tuning, exhaust and ignition systems work together to produce a quick-revving engine with great low and midrange power. 37mm Keihin FCR flat-slide carburetor with throttle position sensor (TPS) ensures ultra-precise fuel/air mixing and lightning-quick throttle response. Close-ratio five-speed gearbox tackles almost any terrain. “No tools” airbox uses hinge-type quick-open lid. Battery rides low for excellent handling. Digital CDI ignition system delivers more precise spark and monitors engine speed to ensure optimal timing for fast, strong response during hard acceleration. Large-capacity radiators with reinforcements ensure maximum cooling efficiency with great strength. Lightweight exhaust system maximizes engine power and allows hassle-free replacement of oil filter. Aluminum muffler with USFS-approved spark arrestor looks trick and keeps things light. Works-style clutch lever features oversize barrel adjuster for easy, on-the-fly adjustability of lever/cable play. Electric start ensures easy restarts.
Chassis/Suspension:
YZ-inspired aluminum frame reduces weight while optimizing mass centralization. An extensively tested assembly of aluminum forgings, castings and extrusions, the WR frame retains legendary Yamaha handling and response. Removable aluminum rear subframe constructed of square-section tube for reduced weight. Fully adjustable air-/oil-separate 48mm fork tubes deliver precise, fade-free handling; fork protectors provide excellent tube protection. Tapered swingarm uses YZ-style linkage for controlled, compliant rear suspension action. Axle and holders reduce weight in a critical area. The Kayaba shock provides 12.2 inches of travel with adjusters for high- and low-speed compression damping, rebound and spring preload and features a larger piggyback reservoir for excellent damping and fade resistance. New, wave disc brake rotors front and rear reduce unsprung weight and provide excellent performance. Front and rear calipers with aluminum pistons deliver strong stopping power with progressive feel. Lightweight 21-inch front and 18-inch rear rims provide exceptional durability and help reduce unsprung weight for optimal suspension performance. Premium Dunlops offer unbeatable, competition-spec traction and excellent wear.
Additional Features:
Cool YZ-derived bodywork and a thick seat look great and feel excellent on long rides. ProTaper aluminum handlebar in forged triple clamp shaves weight and increases comfort. Wide footpegs for great comfort. Slim-design, lightweight fuel tank holds 2.1 gallons. One-piece, high-strength, plastic skid plate shaves weight and offers great protection. Lightweight, 35-watt headlight and sweet LED taillight maximize visibility and draw less current. Adjustable front brake lever. Repackable aluminum muffler shaves weight. Front wheel collar makes front wheel removal quick and easy.
2008 WR250F
MSRP*
$6,399 (Team Yamaha Blue/White) Available from October 2007
YZ-inspired handling and looks, and a stout 223cc air-cooled, SOHC four-stroke producing predictable, broadband power make the TT-R230 a great choice for beginner and intermediate riders. Competition-style flat seat/tank junction for great rider mobility. Electric start makes getting started a complete pushbutton exercise. A low seat height on top of a long-travel suspension and 11.6 inches of ground clearance mean this is a serious trailbike that’s also accessible to a wide range of riders. Steel, diamond-type frame means great handling and strength.
Engine:
Super-reliable, electric-start 223cc air-cooled SOHC four-stroke puts out smooth, widespread of power perfectly suited for all kinds of trails and riders. Smooth-shifting, six-speed transmission with heavy-duty clutch geared for maximum versatility and usable power delivery. CDI magneto ignition system is ultra-reliable and nearly maintenance-free. YZ-type air filter for easy maintenance and maximum airflow. Lightweight exhaust with muffler and quiet, USFS-approved spark arrestor. Automatic cam chain tensioner means minimal maintenance and longer engine life.
Chassis/Suspension:
Steel frame design with compact wheelbase and low seat height combines accessibility to new or smaller riders with superb maneuverability and super-responsive handling. Linkage-mounted rear shock serves up 8.7 inches of smooth, progressive rear wheel travel for great bump absorption and handling. 36mm front fork with 9.5 inches of wheel travel provides plush, confidence-inspiring control over rough terrain. 11.6 inches of ground clearance should be enough to deal with almost any trail. Aluminum box-section swingarm features snail-type chain adjusters for quick and easy chain adjustments. Front 194mm disc and 130mm rear drum brakes for powerful, confident stops. Full-size 21-inch front and 18-inch rear aluminum wheels keep unsprung weight down, while knobby tires provide motocross-spec grip.
Additional Features:
Long seat is low, comfortable and allows easy rider movement. Team Yamaha-inspired colors, graphics, and front and side number plates create distinctive styling. Sleek fuel tank with 2.1-gallon capacity for good range and excellent freedom of movement. Large, folding cleated footpegs provide excellent footing even in wet or muddy conditions. Durable fork boots provide excellent fork seal and stanchion tube protection.
2008 TT-R230
MSRP*
$3,499 (Team Yamaha Blue/White) Available from September 2007
Engine
Type
223cc air-cooled SOHC 4-stroke, 2 valves
Bore x Stroke
70.0mm x 58.0mm
Compression Ratio
9.5:1
Carburetion
Y26P
Ignition
DC-CDI
Transmission
Constant-mesh 6-speed; multiplate wet clutch
Final Drive
Chain
Chassis
Suspension/Front
Telescopic fork; 9.5-in travel
Suspension/Rear
Single shock; 8.7-in travel
Brakes/Front
194mm single disc
Brakes/Rear
130mm drum
Tires/Front
80/100-21 NHS
Tires/Rear
100/100-18 NHS
Dimensions
Length
81.3 in
Width
31.5 in
Height
46.5 in
Seat Height
34.2 in
Wheelbase
54.5 in
Ground Clearance
11.6 in
Dry Weight
236 lb
Fuel Capacity
2.1 gal
Other
Warranty
90 Day (Limited Factory Warranty)
2008 TT-R125L/LE
Key Features:
Big fun for the whole family in a small package, the YZ-styled four-stroke-powered TT-R125s beg to be ridden by everyone from bigger kids to adults. A seat height of less than 32 inches makes these accessible to most riders, but over 10 inches of ground clearance and long-travel suspension at both ends mean they’re also serious trail bikes. The full-boat “LE” model features pushbutton electric start, 19- and 16-inch wheels for great handling, an aluminum swingarm, adjustable suspension calibrated for aggressive and/or bigger riders and a 220mm front disc brake. “L” model features primary kickstarting, 19- and 16-inch wheels for great handling, and a 198mm front disc brake for powerful stopping.
Engine:
Potent, 124cc air-cooled SOHC four-stroke powerplant puts out torquey, broadband power tuned for maximum off-road performance in a wide range of trail conditions. 20mm Mikuni carburetor ensures crisp, dependable throttle response. Smooth-shifting, five-speed transmission with heavy-duty clutch is geared for maximum versatility and usable power delivery. Smooth-shifting, YZ-type five-speed transmission with heavy-duty clutch is geared for maximum versatility and usable power delivery. CDI ignition system is ultra-reliable and never needs maintenance. Easy-access, tool-free air filter adds extra convenience during maintenance. Lightweight exhaust system features quiet, USFS-approved spark arrestor.
Chassis/Suspension:
Rigid frame design features a long wheelbase to accommodate bigger riders while maintaining quick, agile off-road handling. 31mm telescopic front fork with 7.1 inches of travel on all three models for plush, confidence-inspiring control over rough terrain. TT-R125L has slightly stiffer settings than TT-R125E to deliver more aggressive off-road performance and handling. TT-R125LE features preload adjustability and slightly stiffer settings than the TT-R125L, for even more aggressive off-road performance and handling. Big 19-inch front and 16-inch rear wheels on the 125LE and 125L mean great handling and terrainability combined with sharp, predictable steering. Single rear shock with 6.6 inches of travel on the 125LE and 125L provides predictable handling for the aggressive rider. Box-section swingarm features snail-type chain adjusters for quick and easy chain adjustments. TT-R125LE features lightweight aluminum box-section swingarm for reduced unsprung weight and optimum suspension performance. Front and rear brakes deliver strong, dependable stopping power. Knobby tires offer superb grip and exceptional wear.
Additional Features:
Long, YZ-style seat is low, comfortable and allows easy rider movement. “Gripper” type seat aids seat-of-the-pants feel. Team Yamaha–inspired colors, graphics, and front and side number plates create styling similar to larger YZ lineup. Sleek, narrow fuel tank helps create big-bike look and feel. Large, folding cleated footpegs provide excellent footing even in wet or muddy conditions. Durable fork boots ensure excellent fork seal and stanchion tube protection.
2008 TT-R125L/LE
MSRP*
$2,699 TT-R125L (Team Yamaha Blue/White) Available from August 2007 $2,899 TT-R125LE (Team Yamaha Blue/White) Available from August 2007
Engine
Type
124cc air-cooled SOHC 4-stroke; 2 valves
Bore x Stroke
54.0mm x 54.0mm
Compression Ratio
10.0:1
Carburetion
VM20 X 1
Ignition
CDI
Transmission
Constant-mesh 5-speed; multiplate wet clutch
Final Drive
Chain
Chassis
Suspension/Front
Telescopic fork; 7.1-in travel
Suspension/Rear
Single shock; 6.6-in travel
Brakes/Front
198mm single disc
Brakes/Rear
110mm drum
Tires/Front
70/100-19 42M
Tires/Rear
90/100-16 52M
Dimensions
Length
74.2 in
Width
31.3 in
Height
42.7 in
Seat Height
31.7 in
Wheelbase
50 in
Ground Clearance
11.6 in
Dry Weight
L Model is 172 lb -- LE Model is 185 lb
Fuel Capacity
1.6 gal
Other
Warranty
90 Day (Limited Factory Warranty)
2008 TT-R110E
Key Features:
All-New for 2008
Convenient electric starter for effortless starting. Big fun for the whole family in an all-new package, the YZ-styled four-stroke-powered TT-R110 begs to be ridden by everyone from bigger kids to adults. A seat height of only 26.4 inches makes this one accessible to most riders, but 7.1 inches of ground clearance and great suspension at both ends mean it can go places. Class-exclusive four-speed auto-clutch transmission has an easily accessible gear for nearly any terrain.
Engine:
Torquey/powerful 110cc air-cooled SOHC four-stroke powerplant is tuned for maximum off-road performance in a wide range of trail conditions. Compact hemispherical combustion chamber with 9.3:1 compression produces max torque at 4000 rpm, max horsepower at 7500 rpm. Four-speed gearbox with automatic clutch has the right gear for wherever you ride. Convenient electric starter for effortless starting. CDI ignition system is ultra-reliable and never needs maintenance. Automatic cam chain tensioner means minimal maintenance and longer engine life. Easy-access, tool-free air filter adds extra convenience during maintenance. Lightweight exhaust system features quiet, USFS-approved spark arrestor.
Chassis/Suspension:
Steel backbone frame ties steering head and swingarm pivot together via a straight line, with the engine mounted at three places for optimum strength and high ground clearance. 31mm fork with high-tech internals including a damper valve with oil lock provides excellent damping, great bottoming resistance and 4.5 inches of smooth travel. Monocross rear suspension pivoting on a strong, 12mm shaft, along with a gusseted steel swingarm, provide excellent rear wheel control through 4.3 inches of travel. Die-cast aluminum top triple clamp helps provide light, precise handling and looks great, too. 26.4-inch seat height and 7.1 inches of ground clearance help inspire confident performance on rugged trails. Front and rear drum brakes deliver strong, dependable stopping power. 14-inch front and 12-inch rear wheels inspire great rider confidence by keeping the seat low and the steering light. Knobby tires offer superb grip and exceptional wear.
Additional Features:
Long, YZ-style seat is low, comfortable and allows easy rider movement. Team Yamaha–inspired colors, graphics and front and side number plates create styling similar to larger YZ lineup. Large, folding, cleated footpegs provide excellent footing even in wet or muddy conditions. Key-type ignition switch deters unauthorized riding.
2008 TT-R110E
MSRP*
$1,849 (Team Yamaha Blue/White) Available from September 2007
The TT-R50E gets the same pushbutton electric starting feature as our full line of electric start TT-Rs. Great for learning and/or playing, complete with 49cc of four-stroke fun feeding power through a three-speed automatic-clutch transmission. Big YZ styling meets little peoples’ stature; the seat’s only 21.9 inches from the dirt. Inverted fork and Monocross® rear end provide great handling. Large chain cover for maximum protection and minimal maintenance.
Engine:
49cc air-cooled, SOHC powerplant puts out smooth, reliable four-stroke power perfect for kids and small novices. Three-speed gearbox with automatic centrifugal clutch makes learning to shift gears a breeze. Convenient electric starter for effortless starting. Compact-design cases keep overall engine width down to 296mm, for a narrow feel and great handling. 13mm Mikuni VM-type carburetor with automatic on/off electric heater ensures crisp, dependable throttle response. Automatic cam chain tensioner reduces maintenance. CDI ignition system delivers hot, reliable spark and requires minimal maintenance. Lightweight, upswept exhaust system contains a quiet, WR-type USFS-approved spark arrestor.
Chassis/Suspension:
Curved steel backbone frame keeps the TT-R50E narrow and has three engine-mounting points for excellent rigidity and handling. Inverted fork with 22mm sliders provides 3.8 inches of smooth front wheel travel for a great ride and handling. Monocross-style rear suspension is controlled by a single coil-over shock and provides 2.8 inches of bump-smothering rear wheel travel. Front and rear 80mm drum brakes deliver strong, dependable stopping power, and the rear’s activated by a right foot pedal just like the big YZs. 10-inch front and rear wheels with knobby tires offer great grip and exceptional wear. Low, 21.9-inch seat height allows most kids to put both feet down for handling-enhancing and added confidence.
Additional Features:
Key type ignition switch deters unauthorized riding. Throttle stop screw lets the adult supervisor restrict speed while beginners are learning. Cool-looking YZ bodywork includes an integrated front fender/number plate. Standard sidestand tucks up out of the way when not in use. Handy choke lever is located right in front of the main switch. Large, folding, cleated footpegs provide excellent footing.
2008 TT-R50E
MSRP*
$1,199 (Team Yamaha Blue/White) Available from August 2007
Engine
Type
49cc air-cooled SOHC 4-stroke; 2 valves
Bore x Stroke
36.0mm x 48.6mm
Compression Ratio
9.5:1
Carburetion
VM11
Ignition
CDI
Transmission
Constant-mesh 3-speed; automatic clutch
Final Drive
Chain
Chassis
Suspension/Front
Inverted telescopic fork; 3.8-in travel
Suspension/Rear
Single shock; 2.8-in travel
Brakes/Front
80mm drum
Brakes/Rear
80mm drum
Tires/Front
2.50-10-4PR
Tires/Rear
2.50-10-4PR
Dimensions
Length
51.4 in
Width
23.4 in
Height
30.5 in
Seat Height
21.8 in
Wheelbase
36.4 in
Ground Clearance
5.3 in
Dry Weight
119 lb
Fuel Capacity
.82 gal
Other
Warranty
90 Day (Limited Factory Warranty)
2008 PW50
Key Features:
Fully automatic transmission means no shifting required; the PW50 is a total twist-and-go package. Torque-tuned, spunky little 49cc two-stroke is built to thrill without intimidating beginners. A seat only 19.1 inches high makes this one the logical choice for the littlest rider in the group. An adjustable throttle stop screw lets the adult in charge gradually increase speed as skills improve. Shaft final drive makes chain maintenance a thing of the past.
Engine:
49cc air-cooled case-reed–inducted two-stroke single is tuned to deliver predictable power that gently eases the new rider up the off-road learning curve. Single-speed automatic transmission means the rider simply twists the throttle and goes, allowing him/her to concentrate on the ride ahead. Class-exclusive shaft drive system is virtually maintenance-free and comes fully enclosed for added durability. Exclusive autolube oil injection system eliminates the need for fuel/oil premixing.
Chassis/Suspension:
19.1-inch seat height allows most kids to put both feet down for handling-enhancing and added confidence. 22mm telescopic front fork with 2.4 inches of travel smoothes out the bumps for responsive handling. Mag-style wheels mean there’s no need to tighten or replace spokes. Dual rear shocks with 2.0 inches of travel smooth the trail to deliver confidence-inspiring ride quality. Front and rear drum brakes provide smooth, predictable stopping power. 10-inch front and rear knobby tires provide excellent traction and superior wear. Quiet exhaust pipe, complete with removable baffle, is routed away from the rider. Rear fender, seat and side panel unit removes quickly for ease of maintenance.
Additional Features:
A thick seat cushions the trail’s blows and allows maximum rider movement. Team Yamaha-inspired colors, graphics and front and side number plates create styling just like the bigger off-roaders. Large, folding footpegs with rubber grips provide excellent footing. Standard centerstand for added convenience. An adjustable throttle stop screw lets the adult in charge gradually increase speed as skills improve.
2008 PW50
MSRP*
$1,149 (Team Yamaha Blue/White) Available from August 2007
Yeh, it's me. Rick Sieman, aka "Super Hunky". I've been around the off-road scene since right after the earth cooled. In the process, I've accumulated some odd bits of knowledge and have become horribly opinionated.
Creator/Editor/Publisher of Dirt Bike magazine; Editor of Off-Road Magazine; Off-Road Editor of Old Bike Journal; Raced in every Barstow to Vegas event from 1968; Trophied the Blackwater 100 a few times; Raced in Europe, Japan, Peru, Guatemala & Mexico; Competed in over 1000 dirt bike races; Crashed my brains out too may times to count
Articles by Rick Sieman
Untitled Document
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