How To Diagnose And Fix A High Idle On Dirtbike!

A very high idle can be caused by an air leak or the throttle assembly. Air leaks are common along the air boot or the intake manifold. If you are more unlucky an air leak can appear in your left crank seal. Check the easy things first starting with your air filter, then moving along towards your throttle assembly to make sure your cable is not sticking. My problem ended up being a chipped carb slide.