JE Pistons 261540 High-Performance Forged Motorcycle Piston 77mm 13.5:1

The JE Pistons 261540 is a high-performance forged piston engineered for demanding motorcycle applications. Built by the industry's most decorated piston manufacturer, this Pro Series piston delivers race-proven reliability and precision in a purpose-built forging. With a 77mm bore and an aggressive 13.5:1 compression ratio, it is designed for riders and builders who demand maximum power output from their engine builds.

JE Pistons brings over 50 years of experience supplying championship-winning teams across NASCAR, the Indy 500, Baja 1000, SCCA Trans-Am, 24 Hours of Daytona, Le Mans, Paris to Dakar, and many other premier motorsport events. That same race-tested engineering is built into every Pro Series motorcycle piston.

Key Features:

• 77mm Bore — precision-sized for accurate fitment and optimal ring seal
• 13.5:1 Compression Ratio — ideal for high-performance and race applications
• Smooth Radius Dome and Dish Designs — promotes efficient combustion chamber dynamics
• Radiused Valve Reliefs — reduces stress concentrations and improves durability
• Precision CNC-Machined Ring Grooves — ensures consistent ring seal and long service life
• Machined Oil Drain Back Holes — engineered for specific oil control requirements
• Factory Honed Pin Bores — includes matched wrist pins and locks for a complete, ready-to-install assembly
• Pro Series Reduced Weight Design — dedicated forgings minimize reciprocating mass for improved throttle response and engine efficiency

Each JE Pro Series piston is manufactured from high-strength forged aluminum alloy and machined to exacting tolerances, making the 261540 an excellent choice for high-compression motorcycle engine builds where performance and reliability are non-negotiable.

Note: Product image is representative. Actual appearance may vary by application.