I just put a Clarke 2.6 gal tank on my 08 CRF450R.. Rode it for the first time on sat and about an hour into the ride, pretty slow tight technical stuff, It started to stall and fall on its face whenever i would hit the throttle.. I stopped and heard a hissing noise, Took the gas cap off and it had a ton of pressure in it, I looked at the fuel and looked like it was boiling, or like somebody had a blow gun at the bottom of the tank blowing bubbles into the fuel. i went back to the truck and disassembled the gas cap. reamed the vent hole out a bit and removed the check ball, rode the rest of the day without a problem.. Has anybody else ran into this with a clarke tank or gas cap??