dee-stroyer

hopefully not a cdi i just put one in a year ago and had a hell of a time finding it. yamaha discontinued them for the 87. i'll check it out guys thanks alot.

i have an 87 warrior and it seems to run fine until i rev it up. when i ride and give it full throttle it seems as though it's hitting it's rev limiter, but it's only about half of whats normal. i cleaned the carb thinking that was the problem but nothing changed. could it be lack of back pressure? exuast could be pouched. or spark plug??? i don't know any suggestions?