Either you have overfilled the crankcase, or you have a serious problem. The glass sight for checking the oil level, has a small flathead screw in the center. This screw is attached to a wiper on the inside of the sight glass. When you rotate the screw,(clockwise to prevent unscrewing), the wiper will clean the spooge from the inside of the sight glass, making reading the oil level easier. The oil should only be up to the center of the sight glass. If this is normal, then engine disassembly is required to locate the problem. P.S.;When reading the oil level, be sure to have the bike sitting level, on the center stand. If you read it like a Harley, (on it´s side stand), you will overfill the crankcase, causing the symptoms you described. Good luck!