I HAVE HAD THIS 95 POLARIS SPORT 400L SINCE IT WAS NEW, I AM HAVING A PROBLEM WITH IT FALLING ON ITS FACE. I CAN GIVE IT FULL THROTTLE AND IT WILL GO AROUND 40 YARDS FINE AND FALL ON IT NOSE. ANY IDEAS WHAT COULD CAUSE THIS

IT HAS SAT FOR 8 YEARS AND I JUST GOT IT OUT THIS SPRING FINALLY..........I HAVE REPLACED THE FOLLOWING:


BATTERY
SPARK PLUG
FUEL LINE
REBUILT THE CARB
I CHECKED THE REED VALVES THEY LOOKED FINE AND I CLEANED THEM
IT WAS FALLING ON IT'S NOSE BEFORE I REBUILT THE CARB ALSO!!!!


MAYBE YOU GUYS CAN GIVE ME SOME IDEAS ON WHAT TO CHECK???????

 

have you checked the vent lines?
any air leaks from the boots?
the air neddle might be set wrong. mine is 2 1/2 turns out from bottom
does it rev up in nuetral fine?
could be a clutch issue. rust on the buttons or something of that nature

 

im not sure about the vent lines.............which one goes where


book i have doesnt give to much detail


there are 2 lines that come off of the carb where do they go...........i replaced the old carb boot and stuff?????????????????????????

i have one hooked into crank and the other somewhere else????????????

 

take the gas cap off and try it.This will vent the tank

 

plugged exhaust??