i just received my new 3.2 ims tank and cap this week installed it thursday(btw it came yellowed from ims) rode that afternoon and after about one hour the motor sputtered and quit,i wouldnt start until i took the gas cap off then it started right up. it continued 3 more times until i got home. today i checked the cap and it would not breath. i had to drill a hole in it to get it to vent and then put a inline vent in the vent hose. my question(should i hastle w/ ims about the cap-and about the pre yellowed tank they sent me.)????