i have a 98 rn with a b pipe, i put msd enhanced ign at the end of last year. it started running a bit lean but i adjusted the carbs and it was pretty good. this year it is running lean. i already had 135 main jets in it from the b pipe i upped them to 140 mains and i am two turns out already and no difference at all. The plugs are still white. What do you think is the problem. Crank seals??? or what???