S&S Cycle 920-0089 Low Compression Forged Piston Set 3-7/16" +.080" Oversize

The S&S Cycle 920-0089 is a low compression forged piston set featuring a 3-7/16" bore with +.080" oversize, designed for stock bore stroker applications in classic Harley-Davidson Big Twin engines. This piston set is engineered with a 4-3/4" stroke length and uses a 0.791" wrist pin, making it ideal for 84", 86", and 88" stroker engine builds.

Key Features:

• Forged construction delivers superior strength and durability
• Modern alloys and optimized piston skirt profiles ensure low noise and long engine life
• 50cc dome volume for proper compression characteristics
• Complete piston kit includes rings, piston pin, and circlips for a ready-to-install package
• 3-7/16" bore diameter with +.080" oversize specification
• Low compression design optimized for stroker applications

This forged piston set is manufactured by S&S Cycle using precision engineering and quality materials to provide reliable performance in vintage Big Twin rebuilds. The low compression configuration makes these pistons particularly well-suited for stroker builds where compression ratios need to be managed carefully. Each kit contains everything needed for a complete piston installation, including precision-matched rings and all necessary hardware.