do what sctty said, take out ur plug and pour a teaspoon of oil. Those oil will seal the rings better and also it will carry all those fuel in your cylinder down to the crank. Also you should try to do a leak down test and see if you got any compression leaking out your intake value, exhaust vaule, head, or compression ring. Here a easy site for it http://www.type2.com/library/engineg/leaktst.htm. See if you have any air leaking out of air filter, tailpipe, rad cap, or oil dip stick. The gauge shouldnt cost more than 5-10 buck. Hope this help