cat45
10-16-2006, 01:39 PM
i have an 03 big bear 400 with 165 miles on it. the quad runs good while riding but doesn't idle very well. it had a mouse nest in the air box so i cleaned the carb and put a new filter and filter wrap on it. the machine starts fine but has what sounds like a backfire coming through the carb, you can see the carb jump back when this happens. both carb clamps are tight.the backfire isn't loud kinda just sounds like a slight miss.if anyone can give some advice it would be appreciated