JE Pistons Piston Kit, 80.00 mm, 13.0:1 Compression Ratio for Yamaha (247940)

The JE Pistons 247940 Piston Kit is engineered for extreme applications, including professional competition and high-performance Yamaha engine builds. Designed to deliver dependable performance under demanding operating conditions, this piston kit combines precision manufacturing with materials selected for strength, durability, and consistent operation. The piston features an 80.00 mm bore size and a 13.0:1 compression ratio for builders seeking enhanced combustion efficiency and performance potential.
Machined from high-tensile 2618-T6 forged aluminum, the JE Pistons 247940 is built to withstand the stresses associated with high-performance use. Its domed, dished, or flat-top design incorporates smooth-flowing radii that help simplify installation and require no additional deburring or preparation. This precision-focused construction supports reliable fitment and helps reduce preparation time during engine assembly.
The kit includes the piston, wrist pin, circlips, and piston rings unless otherwise noted. Each component is selected to work together as a complete piston assembly for convenient installation and dependable service. Manufactured in the USA, the JE Pistons 247940 combines application-focused engineering with forged construction for Yamaha enthusiasts, engine builders, and professional teams requiring a performance-oriented replacement or upgrade.

Features:

• Engineered for extreme applications, including professional competition

• Made from high-tensile 2618-T6 forged aluminum

• 80.00 mm piston bore size

• 13.0:1 compression ratio

• Domed, dished, or flat-top design with smooth-flowing radii

• Requires no deburring or additional preparation

• Kit includes piston, wrist pin, circlips, and rings unless otherwise noted

• Made in the USA

Ships from Parts Unlimited.