actually i had it for two years and i bought the bike when it had a stock head and i had local shop put the cool head on for me and it didn't have a single problem for almost a whole year . then i blew a couple motors and it was never the same since.i am running a stock carburator with a 389 on the copper part the needle goes through and 270 on the very small jet. i need some serious HELP!

 

TELL ME HOW MANY GALLONS OF GAS TO HOW MUCH OF WHAT OIL AND JETTING.