Super High Rev at Idle or No Idle, Help!

Dirty carb or air leak!
Also, only hand tighten the top of the carb that holds in the slider... If you use a wrench, (too tight), it can warp the carb body & cause the slider to stick!

I concur.


...

I gotta agree with the Pros here...had the same problem- was my carb gasket.....also had a small leak at the clamp where carb and manifold meet- gasket material from the local auto parts store and a little silicone solved it for me.

make sure your throttle cable's not sticking, and that it's not too tight.

if your idle screw isn't working, the cables probably too tight. the slide will sit just above the notch for the screw, and it'll rev to the moon.

reading your post again, check for the airleak first.

also, to ease your mind, it's really doubtful your exhaust has anything to do with it, as it's totally unrelated to the problem. it's probably something that happened while installing that exhaust, like dropping your bike on the ground...

same thing happened to me once check you head gasket i blow mine had to replaced has ran fine ever since