JE Pistons 362953S FSR Piston Kit 77mm Bore 14:1 Compression Yamaha YZ250F

The JE Pistons 362953S FSR Piston Kit is a high-performance forged racing piston designed for Yamaha YZ250F and YZ250FX dirt bikes. This kit features a 77.00mm standard bore with a high 14.0:1 compression ratio, engineered for extreme racing applications and professional competition.

Key Features:

• Machined from 2618-T6 high tensile forged aluminum for superior strength and durability
• 77.00mm standard bore diameter with 14.0:1 compression ratio
• Dome features smooth flowing radii that require no deburring or preparation
• Complete kit includes piston, wrist pin, circlips, and piston rings
• Engineered specifically for professional racing and extreme performance applications
• Made in the USA with over 70 years of JE Pistons racing expertise

JE Pistons has established itself as the industry leader in forged racing pistons, with proven performance from Daytona to Bonneville. This FSR (Forged Street/Race) piston kit delivers the durability and performance demanded by professional racers while maintaining the precision tolerances required for reliable operation.