JE Pistons 291510 Pro Series 2-Ring Forged Piston Kit 97mm 12.8:1

The JE Pistons 291510 is a Pro Series 2-Ring forged piston kit engineered for high-performance motorcycle and powersports engines. Featuring a 97mm bore diameter and a 12.8:1 compression ratio, this piston kit is purpose-built for demanding competition and performance applications where reduced friction, lighter reciprocating mass, and faster throttle response are essential.

The 2-ring design eliminates the traditional oil ring, delivering lower friction and reduced overall piston weight compared to conventional 3-ring setups. This configuration also demands more frequent oil change intervals to maintain proper engine lubrication and longevity.

Key Features:

• Pro Series dedicated forgings — purpose-built forging designs reduce overall piston weight without sacrificing structural integrity
• 2-ring piston configuration — reduces friction and reciprocating weight for faster engine response
• Smooth radius dome and dish design — promotes optimal flame travel and requires no additional deburring or preparation
• Radiused valve reliefs — precision-formed for clearance and reduced stress concentration
• Precision CNC-machined ring grooves — ensure accurate ring fitment and consistent sealing
• Machined oil drain-back holes — engineered for application-specific oil control
• Factory honed pin bores — wrist pins and locks included, ready for installation

Specifications:

• Bore Diameter: 97mm
• Compression Ratio: 12.8:1
• Ring Configuration: 2-Ring
• Bore Type: Standard Bore

JE Pistons are engineered, forged, and machined in the USA, combining decades of motorsports expertise into every component. The 291510 kit includes the piston, wrist pin, and locks, providing everything needed for a professional-grade engine build.