Put the bike on a stand with the wheels off the ground. Pull up on the front wheel to see if there's any play in the neck bearings. If so, re-torque the nut. Check the rear shock bushings. If they are not centered on the bolt, replace them. Make sure they are both on the same setting. Spin the front tire to see if it runs true and has no bulges. If it does, it may have a broken belt. Check the trueness of the wheel also. Do you hear any unusual noises? Most of the bearings are pretty dry from the factory. It helped with handling and wobble when I put in a set of Progressive springs, serviced the head bearings and upped the tire pressure to 38-40. Cured the left side tire wear too.