Why does my motorcycle start up and rev at 4000 rpms with the choke off? What is the problem?

Answer by  lexuslady315 (635)

You would want to check the choke or you should look into the oxygen sensor. That made my car go way up on the rpms. Might wanna check your spark plugs too.

Answer by  TrackDayFiend (13)

Your idle adjustment could be way off. Try unscrewing it in half turn increments until the bike doesn't rev high anymore. Don't be afraid of letting it run that high. It can't be anything serious if the bike turns on.