Ditto on what Graham said… today I pulled my carbs and the pilot jets were plugged. It ran on choke only and would not rev (old gas). Now with new plugs/clean carbs and fresh fuel it revs great but doesnt idle perfectly off choke. I am going to have the carbs checked again by a cycle mechanic friend of mine to verify that I didn’t miss anything….my bike sat for quite a while contributing to my dilemma.