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• Part Number : Superseded part - replaced by a newer part.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 BKXJ Crankshaft & Piston assembly is the powerhouse of your Yamaha RayZR, converting combustion into thrilling motion. This kit features the high-strength Crankshaft Assy and the precision-engineered B7JE16312000 piston, paired with the Piston Ring Set (STD) for a perfect cylinder seal and maximum power. Internal synchronization is handled by the high-durability Gear Pump Drive and a high-quality Bearing. The assembly includes the Pin Piston and Circlip for secure installation, along with the Key Woodruff for timing alignment. Every component is engineered to withstand the intense pressures and high RPMs of the engine, providing the technical clarity of a smooth, balanced rotating assembly. By choosing genuine Yamaha parts, you ensure maximum power output and long-term durability. Whether you are performing an engine rebuild or a refresh, this kit offers the purchase confidence and technical excellence required for peak performance. Ride with the heart of a storyteller and the power of Yamaha’s finest engineering at the very core of your machine.