I have a yamaha fzr 600 1990 3HE model, 30.000 miles.
The bike drives fine but the issue I have is that if I rev the engine, after it is hot, will stay at 3000 rpm for about 2 sec before dropping to idle. Not much of an issue while driving but annoying at times when stopping for lights as the bikes just revs. It stays up for few secs and i often get it down by letting go of the cluthc to point of stalling and the revs will drop.
When the engine is cold it doesnt do it. I have had two sets of carbs and both do it. I have new intake rubbers, new oil, clean k/n filter, carbs tuned etc
any ideas?
Hi,just a thought,if you have had two sets of carbs on it and they have been tuned/balanced and still does it,then it is probably not the carbs causing the problem.check your throttle cable,check it is in good condition with no kinks or tight spots,also check it is not jammed between any other component causing a sticky spot,also,check the freeplay in the cable,you should have around a 1/4 " freeplay at the carbs,with the engine running turn the steering lock to lock,the engine revs shouldn't change..s aticky cable can cause the problem you describe.hope this helps...cheers
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