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• Part Number : Superseded part - replaced by a newer part.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 rotating heart of your machine is found in the RayZR B2U9 Crankshaft & Piston assembly. This high-stress kit features the factory-balanced Crankshaft Assy, precision Bearings, and the essential Key Woodruff. Power generation is handled by the high-expansion Piston (STD), secured with a Pin Piston and Circlips, and sealed with the durable Piston Ring Set (STD). For essential engine life-support, the assembly also drives the Gear Pump for the oil system. Every technical detail, from the wrist pin to the journal bearings, is manufactured to prevent vibration and ensure maximum torque delivery across the RPM range. Choosing genuine Yamaha crankshaft and piston components is critical for preventing internal engine fatigue and ensuring a smooth idle. This assembly is a storyteller of power, providing the mechanical clarity and purchase confidence that your RayZR’s internal engine mass is engineered for ultimate durability. Invest in the core of your machine with OEM-grade parts to ensure the legendary longevity Yamaha is known for.