Wiseco WK1294 Forged Piston Kit Bore Oversize - 2-Stroke 86.00mm 2.00mm

The Wiseco WK1294 is a complete 2-stroke forged piston kit featuring an 86.00mm bore (+2.00mm oversize) for Yamaha 760 powerplant applications. Engineered, forged, and machined in the USA at Wiseco's facility in Mentor, OH, this kit delivers the precision and durability that performance riders demand.

Wiseco's 2-stroke pistons are the product of over 80 years of piston manufacturing expertise, incorporating the latest design techniques to maximize performance and service life. Each piston is forged from high-silicon, low-expansion aluminum alloy, which provides superior tensile strength, reduced weight, improved heat transfer, and extended service life compared to cast alternatives.

Key Features:

• Forged Construction: High-silicon, low-expansion aluminum forging delivers superior strength-to-weight ratio and improved heat dissipation
• 86.00mm Bore / +2.00mm Oversize: Increases displacement to approximately 789cc, ideal for refreshing worn cylinders
• Anti-Detonation Grooves: New ring land profiles eliminate ring blow-by while maximizing engine performance
• CNC Diamond-Turned Finish: Precision machining guarantees exact sizing with no variation, compatible with cast iron, chrome, nikasil, and boron composite cylinder bores
• USA Engineered and Manufactured: Designed and built specifically for the 2-stroke powersports engine application
• Complete Kit: Includes forged piston, high-quality piston ring(s), wrist pin(s), and circlips — everything needed for a full top-end rebuild

The WK1294 is the ideal solution for rebuilding or upgrading a Yamaha 760 top end. Wiseco's dedicated forgings and precision lightening operations produce an optimized strength-to-weight ratio, delivering instant throttle response and consistent power output. Trust Wiseco's race-proven engineering for your next engine rebuild.