The gas cap has a device under it which either allows air flow in, or allows it out (not totally sure about this). Anyway, I experienced a problem back in March/April when my atv kept stalling out shortly after starting it. I took off the gas cap and it would start up and run right, but operating without a gas cap is not a wise move. So I figured maybe the metal device that is under the cap was dirty or clogged. I first romoved the rubber hose from the tank cap and that did nothing, then I took my compressed air line from my compressor and blew air into the under side of the cap and then put cap back on and started it up. It ran fine from there out. I was thinking that condensation froze in the cap causing the air restrictions. This only happened to me when it was cold out and during late winter /early spring season.
06 Yamaha Kodiak 450, auto, 4x4 IRS, Locking Diff
with 27" ITP wheels and ITP 589's, Warn 2500 winch, Alloy power tip, Metal skid plate, Moose clutch kit.
11 Kawasaki Vulcan 1700 Classic
03 Silverado 2500HD ext cab long bed 4x4 6.0 4:10's
12' Falcon open trailer