I have 99 aero 1100c3 When riding there is a veberation when under a load. Notice especially at lower rpm. If I inguage clutch it goes away. After purchase of bike took to dealer to change all fluids and check out. The other day I checked fluid in rear. No oil. I put in about a pint of gear lube. After this I had a oil leak which I never had before. I guess they did not put oil in it. Is there bearing or could I have messed up the gears? Please help I really like my bike and do not want to trade or sell in this condition. Thanks David [email protected]

David, if you ran for a long time with no oil you could have messed up your ring and pinion gear. the leak is most likely because of a ruined bearing, and if you get lucky maybe that is all. the vibraition could be just the misalignment of the gears caused by the bad bearings.

Once I forgot to put hypoid gear oil into my final drive and drove 30 miles to work before I realized the fill cap was not on. I filled it and capped it and it worked fine for years. That system only used about half a cup of hypoid. You may have put in too much oil and the excess is coming out the vent. You may have only popped the seal. If you damaged the rear end, it wont last long and , unfortunately, you may have to replace the assembly. Again I think it may just be overfilled. As for the vibration The quality of the dealer tells me that during the 600 mile check up they probably did not adjust your steering head bearings. if the steering head bearings are loose they can cause an assortment of hard to diagnose problems. Dig down under to the upper triple clamp and tighten the bearing a good snugging should be all it needs.You should be able to use the shock tool in the tool kit to turn the nut.