I recall there are, Im not very good with these things electrical compared to the engine. if you google/search a bit you can find it on here
I had a similar issue, bike would run good down low but then felt like i was hitting rev limiter early. thought it was a jetting issue but seemed to make no difference. then i thought gearing since i hopped the engine up. finally i had enough and put a new stator in and a new starter clutch (it was hanging up) and all my issues went away. for some reason the stators only last so long on these bikes.
-2004 450R. Far From Stock.. Sold, crank was going
-2006 450R. New WHIP..
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-You can watch things happen, you can make things happen, or you can wonder what the H*ll happened. Captain Phil Harris