Color Legend:

• Red: Canceled part - unavailable for any operations.
• Blue: Part of a kit - cannot be ordered individually.
• Gray (Dimmed): Disabled part - non-interactive for various reasons.
• Part Number : Superseded part - replaced by a newer part.

Description: - The pulse of your power plant is captured in the RayZR B2U3 Crankshaft & Piston assembly. This technical engine core features a factory-balanced Crankshaft Assy, precision Bearings, and the essential Key Woodruff. Combustion force is delivered by the Piston (STD), secured by the Pin Piston and Circlips, and optimized with a high-tension Piston Ring Set (STD). For essential engine cooling and lubrication, the assembly also drives the Gear Pump. Every component is engineered for perfect synchronization, ensuring the machine remains smooth and vibration-free at all speeds. choosing genuine Yamaha internal rotating parts is critical to maintaining the mechanical integrity and resale value of your RayZR. This assembly is a storyteller of strength, providing the purchase confidence and technical clarity of a power center built from the finest materials and engineered for the long-haul demands of the modern urban rider. Invest in the B2U3 core for the same uncompromising quality and durability found in Yamaha’s world-class professional-grade engines.