Hello, have a 1998 Sportsman 500 that will start, but runs like crap. If I take the airbox off I can keep it running, but if the airbox is on, I have to keep fluttering the accelerator to keep it running. If I push the throttle past half way, it bogs down and dies. It backfires through the carb and there is gas in the boot that connects the carb to the airbox.
The cam and rocker were replaced so I don't think that is the issue. We rebuilt the carb today, but that really didn't change the way the quad runs.
I am hoping to get some suggestions on how to proceed as I am at a loss as to where to go next?
Any advice is appreciated!
The cam and rocker were replaced so I don't think that is the issue. We rebuilt the carb today, but that really didn't change the way the quad runs.
I am hoping to get some suggestions on how to proceed as I am at a loss as to where to go next?
Any advice is appreciated!

