I just purchased a 1994 msx150 that maxs out at 6100 rpm at 43mph. Pulled spark plugs and although they were black, they didnt have any carbon buildup. Checked oil level properly before 40 minute ride. After the ride, oil didnt even show up on dipstick. No abnormal noises in engine and no cel. What can pull this much oil from reservoir? Seems to smoke way more at idle! Please help, Thanks!