JE Pistons 284767L Forged Piston Kit 105.5mm Bore 12.5:1 Compression 3.50mm Oversize

The JE Pistons 284767L is a high-performance forged piston kit engineered for the Yamaha Raptor 700, Grizzly, and Rhino ATV engines. Featuring a 105.50mm bore (3.50mm oversize) and an aggressive 12.5:1 compression ratio, this single-cylinder kit is purpose-built for riders demanding maximum power and reliability from their machine.

Manufactured entirely in the USA, this kit is forged from 2618 aerospace-grade aluminum alloy — the preferred material for high-stress, high-heat performance applications. JE's proprietary Forged Side Relief (FSR) design reduces skirt width to minimize friction and parasitic power loss, while a shorter wrist pin contributes to overall weight savings.

Kit Includes:

• Forged 2618 aluminum piston — 105.50mm bore (3.50mm oversize)
• 12.5:1 compression ratio
• High-quality wrist pin and retaining locks
• JE Pro Seal premium piston rings

Key Features:

• Forged and machined 100% in the USA to exacting tolerances
• 2618 aluminum alloy construction for superior tensile strength under high-demand conditions
• Proprietary FSR forging design reduces friction and power loss
• Engineered specifically for each engine application for optimized durability and performance
• Proven performance on the motocross track, dirt track, and trail

JE Pistons has applied over 75 years of forged racing piston expertise to this ATV-specific kit, making the 284767L a trusted choice for performance builds and engine rebuilds requiring an oversize bore.