ok so final go tmy cub put togethor and started it last night, if fired right up, i went up a little on jetting from my stock cylinder 4mil, I started it with a 155m and 38p , i had a 152m and 38p on my stock cyl setup. well i started the bike and its rich to the point it bearly hold and idle then shuts of, WHY WOULD A BIGGER MOTOR NEED LESS FUEL? Should i just go back down on my main, to a 152, i also have a 150m to try