PDA

View Full Version : 440ex engine problem



Steve89x
04-08-2008, 10:19 AM
Recently just rebuilt engine, Wiseco 12:1 440 kit, hot cams stage 2, jetted, k&n airfilter, aftermarket pipe, started it up first time and it ran nice for about 20-30min and then turned it off b/c we were still waiting on swingarm bearings so couldnt ride it but after the bearings came in and had quad back together, i had a hard time starting it, eventually did and took it for a ride but it kept over revving at half throttle and was only able to get it to 3rd gear due to this, i cant figure out why it is over revs at half throttle and anything past that the quad just dies.

has anyone else had this problem before or know why this is happening and how to fix it, ive been looking at other posts and im thinkin of a few possibilities but would like to know from other people also, thanks

below100hz
04-11-2008, 07:30 PM
how good is your clutch? shortly after i did my bore i burnt out the clutch and it would spin/ the motor would rev but i wasnt spinning tire

Steve89x
04-11-2008, 08:36 PM
brand new i replaced it when i rebuilt motor and also a new cable