JE Pistons 274192 Forged Piston Kit 90mm Bore 11.5:1 Compression

The JE Pistons 274192 is a high-performance forged piston kit designed for big bore applications, featuring a 90.00mm bore size with an 11.5:1 compression ratio. This is a 5.00mm oversize piston kit engineered to increase displacement to 840cc on compatible V-twin engines.

Key Features:

• Forged from premium 2618 aluminum for maximum tensile strength and durability
• 90.00mm bore diameter with 5mm oversize specification
• 11.5:1 compression ratio for enhanced power output
• Engineered, forged, and machined 100% in the USA to exacting tolerances
• Includes high-quality wrist pins, locks, and JE Pro Seal premium piston rings
• 2-cylinder kit (2 pistons required for complete installation)

Special Requirements: Cylinders must be sleeved with compatible sleeve part number KA5592B for proper installation. This big bore kit is designed specifically for performance applications and is backed by JE Pistons' 75+ years of racing expertise across motocross, dirt track, and high-performance powersports applications.