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whats wrong with my bike?
honda nsr 125 jc20 1990 model wont rev past 4k engine has no torque, spark plug is a little oily but no more than any other i ave seen still give a good spark, lots of old oil in the exhaust there is light blue smoke when carb is fully opened, oil pump is functioning properly
have tried running without exhaust and have same problem
2 Answers
- 1 decade agoFavorite Answer
your muffler is probably plugged up with unburnt oil - remove it and try it - if that cures the problem then burn the oil out of the muffler ( heating it up wont hurt it)
- Anonymous1 decade ago
i've incurred that problem before with a suzuki and it took me a while to figure it out but i found that the stator plate undernieth the flywheel had the set screws vibrate loose thus causing the stator plate to move out of it's recommended position causing this problem. the stator plate holds the ignition and lighting coils as well as the CDI timing tone wheel which tells the engine when to fire so when this plate is moved ever so slightly it will make your engine out of time thus running improperly. there should be a slash or punch mark in the metal of the engine case and timing plate that you line up and then use loc-tite on the screws that go through the elongated holes in the stator plate then tighten them and hopefully that takes care of your problem
