Hot Rods Counter Balancer Kit Yamaha Raptor This kit includes dependable bearings specifically designed for the counter balancer shaft of most modern 4-stroke engines, ensuring long-lasting, smooth operation. Hot Rods Counter Balancer Kit is a great sidekick for repairing a new counter balancer or engine case. Features: A must have for any new counter balancer or engine case installation or repair Includes Hot Rods bearings for the counter balancer shaft of most modern 4-stroke engines Note: Does not include water pump bearing or transmission bearings.