Wiseco PK134 Pro-Lite Forged Piston Kit Bore for Yamaha - 2-Stroke 64.0mm RZ350

The Wiseco PK134 Pro-Lite Piston Kit is a complete forged piston solution designed for 1982–1990 Yamaha RZ350 two-stroke engines. Built to a 64.0mm standard bore (513M series), this dual-piston kit delivers the strength, precision, and reliability that Wiseco is known for across decades of motorsport competition.

Pro-Lite Forged Construction:

• Forged from high-silicon, low-expansion aluminum alloy for superior strength and reduced weight compared to cast pistons
• Engineered for excellent heat transfer and extended service life under demanding 2-stroke conditions
• Dedicated forging profiles optimized specifically for the RZ350 engine's power and port characteristics

CNC-Machined Precision:

• Diamond-turned finish produced on CNC turning centers ensures consistent sizing with zero variation between pistons
• Optimized cam shape and piston profile for maximum horsepower and throttle response
• Compatible with cast iron, chrome, Nikasil, and boron composite cylinder bore compositions

Ring & Hardware Specifications:

• Bore: 64.00mm | Stroke: 54.00mm
• Top ring and second ring: Steel with chrome facing
• Floating wrist pin style | Wrist pin diameter: 16.00mm (S486)
• Wrist pin retainers (circlips) included
• Gaskets included

What's Included:

• 2x Wiseco 513M06400 forged pistons (64.00mm)
• 2x Wiseco 2520CD piston ring sets
• 2x Wiseco S486 16.00mm wrist pins
• Circlips and gaskets

Made in the USA, Wiseco Pro-Lite piston kits are the trusted choice of racers and enthusiasts competing in Supercross, Motocross, GNCC, and more. The PK134 kit provides everything needed for a complete top-end rebuild of the twin-cylinder RZ350 engine.