Hey Folks,
My parents have a 2012 250 that they take out a few times a year to ride. Recently it randomly started to cut out/sputter at WOT and high RPM's. If you ride it a gear too high (lugging it a bit), it runs fine. It has more power chugging along than anywhere close to the rev-limiter. It is completely fine bouncing off the actual rev-limiter in neutral. The problem only appears during high load AND high rpm.
What I've done so far-
Ultra-Sonic cleaned Carbs, all new jets/o-rings
A bunch of Main Jets, from 130-150 in steps of 2.5 (Same Condition)
Double and triple Checked all the intake clamps
Checked for air leaks with engine running with carb cleaner (nada)
Brand new Air Filter, with a very modest amount of oil
New Spark plug
Checked Valves
Checked Timing
Checked Fuel flow from petcock
Checked gas cap vent
Checked Float height
Checked the Primary and Secondary Coil windings per manual
Checked Pulse Generator
Checked Battery
Spent the whole day with this damn thing, my best guess now is CDI or stator. Im convinced it's something to do with spark and not jetting. If it was the Main Jet, it would run like garbage at full throttle period. It's had the same jetting since day 1 at all sorts of different elevations and temperatures and it's never been a problem. Was hoping that somebody on here has dealt with something similar, CDI's aren't cheap nor are stators. Thanks!
My parents have a 2012 250 that they take out a few times a year to ride. Recently it randomly started to cut out/sputter at WOT and high RPM's. If you ride it a gear too high (lugging it a bit), it runs fine. It has more power chugging along than anywhere close to the rev-limiter. It is completely fine bouncing off the actual rev-limiter in neutral. The problem only appears during high load AND high rpm.
What I've done so far-
Ultra-Sonic cleaned Carbs, all new jets/o-rings
A bunch of Main Jets, from 130-150 in steps of 2.5 (Same Condition)
Double and triple Checked all the intake clamps
Checked for air leaks with engine running with carb cleaner (nada)
Brand new Air Filter, with a very modest amount of oil
New Spark plug
Checked Valves
Checked Timing
Checked Fuel flow from petcock
Checked gas cap vent
Checked Float height
Checked the Primary and Secondary Coil windings per manual
Checked Pulse Generator
Checked Battery
Spent the whole day with this damn thing, my best guess now is CDI or stator. Im convinced it's something to do with spark and not jetting. If it was the Main Jet, it would run like garbage at full throttle period. It's had the same jetting since day 1 at all sorts of different elevations and temperatures and it's never been a problem. Was hoping that somebody on here has dealt with something similar, CDI's aren't cheap nor are stators. Thanks!