Question about 2002 Yamaha TT-R 125 L
I believe my second gear on my bike has a broken tooth. I have a clicking sound that only happens in second gear. I've read that in order to fix the problem, I have to change second gear and the gear it meshes up with.
What gear meshes up with second gear? Does that mean I have to change first and third as well?
Also, and most importantly for me... what's involved in doing the work yourself? Is it a difficult task for someone with average, to above average mechanical abilities. I've never worked on dirtbike engines, so I was wondering if I'm biting off more than I can chew by doing the work myself. Thanks!
Yes, change second gear and the gear it meshes up with. This is the voice of experience talking. Whatever caused the tooth to break applied the same pressure on the mating gear. That made the meshing gear weak such that as soon as pressure is on it again, it will break a tooth or two right away. See diagram below showing pinion gears, wheel gears and slider gears.
Yamaha ttr 125 clicking sound in second gear - 3783529.png This is the transmission and clutch. The ENTIRE engine tears down, top end, clutch, shifter, kick starter, flywheel and electrics, forks and drum, crankshaft etc. Needed tools are a flywheel puller, case splitter, torque wrench, impact driver and circlip pliers. This is not a beginners project. You can get a factory service manual and give it a try but I don't recommend it. The service manual may or may not have a power transmission diagram. I don't have a diagram for this engine.
Posted on Jul 26, 2009
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Posted on Jan 02, 2017
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