Hey I have a 1991 Polaris indy SP and ther is something wrong . I will go out for a little drive not fast and it will foul the pull cord side plug and act like it is running on one cylinder till i get to about 4900 rpm then it would work wicket anything below that it just wont run good . What i done so far. I took both carbs off put new throdle lines on go some people to set up and clean my carbs propley so they were both sync And it still does the same thing. Im thinking that it is one of my chokes sticking on a little but i dont know. Im going to put a primer on it anyone else got any ideas what clould be going on. Im starting to loose faith in POLARIS