Mark Klein is ready to answer your technical
questions! Mark has extensive experience race tuning off-road
motorcycles for local and national races. If you check back through
our 1998/99 archives you will see a series called "Dirtbikes 101."
Mark brings his expertise to fielding your maintenance and tuning
questions.Send Mark an
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The problem you are
having.
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more detail the better. Examples:
compression test results
spark plug color
death rattles
pinging
or even black goo flying out the
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hi i have a 2002 kx 125 and some times when i get on it it lays on its face (no power)for a second or two and at 6th gear on the road i cant get it to strech out the gear it seems like it runs out of gas it boggs down (no power)
Jordan / Tampa, FL, UNITED STATES
Posted 2007-07-02 22:24:42.0
hello, Mx Tuner I have a 1996 kawasaki kx100 that fouls spark plugs after an hour of riding.The engine was rebuilt about a year ago so the rings can't be the problem.The bike as been jetted down twice.I was wondering if the reeds might need to be replaced.
Randy / omaha, NE, UNITED STATES
Posted 2007-07-15 03:29:57.0
hello, mx tuner, My main bearings were shot on my 96 cr 125 with the manual a buddy and i replaced the bearings. After putting the engine back together and in my bike check to see if it would shift and it does not. We double checked shift forks making sure they were facing the right way the shift paws and shift lever are installed correctly but still wont budge shift up or down. Shift lever moves about 1/8 inch either way and thats it. Any help would be appreciated. Any chance we still put the shift forks in incorrectly?
Derek / piqua, OH, UNITED STATES
Posted 2007-07-26 22:26:08.0
hello mx tuners i just recently bought a 1994 yamaha warrior 350 and i got it for cheap but the thing dont run because the person drove it in water and it aint gettin no spark i checked the coil and its not getin anything to it so what do yoou think it could be ?
sam / clackamas, OR, UNITED STATES
Posted 2008-01-23 19:47:46.0
hey mx turners i am just not having enough power with my 2002 ttr 225 and was wundering what are somethings i can get to up the power in this bike.
drue7432 / opelousas, LA, UNITED STATES
Posted 2008-03-05 22:53:06.0
I have a 2001 cr125. It cranks up and idles but when i give it a little gas it looses fire. When it gets to a certain rpm it quits firing untill it dies out then it restarts and idles untill i give it a little bit of gas then it kills fire again. It also backfires when starting. What is causing this??
brian / west palm , FL, UNITED STATES
Posted 2008-03-14 09:04:47.0
I have a RM 250 1987 (old school mx) top end was just rebuilt 1 over bore maybe 10hours on top end I have some issues not yet seen before 1- Pinging ? from the front end at the muffler /head connection : 2- Black ?druel? at the head / muffler connection and muffler tip : 3- I also have excessive 2stroke smoke with pre-mix of 40:1 using Yamaha oil 4- Sputtler or stumble in 1 gear ?only when stabbing the gas? 2 3 4 gear is fine tons of power Please help I don?t want to kill this again ! Brian rm250
spawn / peoria, AZ, UNITED STATES
Posted 2008-03-17 00:56:28.0
hello i just got my top end fixed on my 2001 yz426f and i just broke it in but in the top end when i rev the throtle it makes a rattling sound in the top but it runs fine do you have any idea of what the problem could be.
Posted 2008-04-13 22:01:16.0
i was wondering how u take the front fork bolt out of a 1997 rm 80 if u could help that would be great
Jeff Delmont / Gwinn, MI, UNITED STATES
Posted 2008-05-11 17:13:53.0
Wondering if a pipe off a 02 cr250 will fit a 98 cr250??..
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Posted 2007-07-01 22:08:24.0
