Thanks LunaCycle for having all the items to repair my BBS02. A cracked reduction gear cover allowed dirt to enter the housing, which wore the teeth out on the large gear and pinion gear. My old pinion gear had a "Z-2" engraved on it, which meant I had to order the older version (Version A). The pinion gear did not come with the o-ring gasket so make sure to save the gasket off of your old pinion gear. The pinion gear fit and works great.