my raptor has been stalling when i would take a good corner or even some bumps. i'm no mechanic so i'm not sure of the names of these parts. anyway, there is a "T" shaped connector between the two carbs with a hose from it. well the hose was crimped. it could easily be seen by removing the seat. i was looking in the wrong places at first and then while i was cleaning the filter i noticed it. runs perfect again. but now my one-way clutch bearing is screwed. probably from being a p.o.s. and the extra cranking. the hi-comp piston didn't help. hope this helps someone.