rufusgooch
New Member
I have a 91 xp yellow motor. the motor was rebuilt before i got it. had her three years. slugish at partial thottle. runs like hell at full throttle for about fifteen seconds and the drops to 1500 rpm after two or three seconds you can feather the throttle back to full. some times happens every twenty or thirty seconds and some time doesnt happen for ten of fifteen minutes. its a twin carb. the guy i bought it from said the bored and stroked the motor. id plate still reads 587. oil injection has been disconected and pre mix now. anyone have an idea?