need help I'm at the end of my rope with this bike.I have replaced the crank seal,new air filter,rejetted the carb 182 on the main and 53 on the slow jet,check float level numerus times,compression is around 160,I did notice a red spark out of the plug when I was checking for ign fire,Could this be the cause of my problem????? I can put a new plug in the bike runs great for about a hour and then it will start fould one every 20 mins or so. Doesnt matter weather im riding the balls off the bike or or trail riding same problem.The plug will be soaking wet with gas. Please help thanks Robbie