Hi I have a 250r 86 trx and its giving me problem with acceleration and I have tested various jet and continued to do the same. Its cut to.80 carburetor is original and not ported also it haves fmf faty pipe with muffler fmf sparkarestor system wire power already is verified , but when I accelerated it half sounds good but it drown, when I take out the sparkplug its wet with gasoline. I have tested 162,155,150 jet when I accelerates it lot of smoke come out. I am using the mixture Castrol 927 two ounces per gallon.