Only had the bike about 4 hrs of fun, great running. then it started missing on slow acelleration and boging bad with more throttle, then you could milk it up out of the missing boging and bam rip on up through the gears as long as you kept the revs up ..changed the diaphram on the side of the carb with no fix. checked all the elect. plugs and the coil resistance. about to look through carb again. What am I missing?