What size is the drive chain? I thought it was a 530, but now you got me thinking. As far as maintenance I use chain wax. Have you noticed it does not need to be adjusted much? One of the benefits of 22 hp. For me, 1 adjustment,3000 miles. Also in your owners manual it states 1 inch of deflection, top run, on centerstand. It's more like 2 inches to be safe. There is a huge difference in chain tightness between suspension relaxed and suspension compressed due to the distance between the output shaft and the swingarm pivot. That geometry is unique to old britbikes and Harley's, where the clutch and output shaft are coaxial.