Zodiac's Starter Ring GearsGZP Starter ring gear BT94 97 102T rivet Starter ring gears often wear out as a result of "Hard to Start" High Performance engines. Ring gears are not available as a replacement part from "The Factory". As a supplier of High Performance engines we had these replacement starter ring gears manufactured. Saves you from replacing the entire clutch basket and ring gear assembly when you chipped a tooth from your starter ring. The required rivets or bolts