The bike sometimes jumps out of second back into neutral, second gear doesnt select properly sometimes, and sometimes it will rev through the rev range in second? would i assume a bent selector fork(dog leg) and can i seperate the crank cases without disturbing the cylinder head?
Since your engine has a horizontal split in the crankcase, the top end does not need to be torn down. Yes, a bent shift fork is likely to be the problem. Before going too far, first check the index wheel and spring on the end of the shift drum. The mechanism may be loose and/or the spring broken. If you are lucky, you may not need to split the case.
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Raver-dave if you have not fixed the problem.what i am doin with my zzr1100c1 is to fit a 1990 zx10gearbox ,you dont need to touch the top end just turn the engine up side down do it form bottm
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