Ive got an 02 426 and have ridden probably 75hrs total. but recently i have noticed a slight burning oil smell when im riding, and it blows some black smoke when its cold. So is it time for a new top end or do the valves need adjusted? I just checked the valves about 9 riding hours ago. so i thought they would be fine. but toamrrow im going to check the valves and see what ive got for clearences. all info is appreciated!!!