S&S CYCLE Flywheel Assembly 320-0603

If you're building a high-performance Harley or restoring a stock engine to reliable operation, the S&S Cycle flywheel assembly is engineered to handle both stock and modified applications without compromise. The forged steel construction and tapered sprocket shaft design deliver the strength and durability you need for demanding rides, while the factory-compatible timing notches ensure seamless integration with your existing crank position sensor. This is a complete assembly—flywheel, crankpin, and connecting rods—so you get everything required for a professional-grade rebuild in one package.

• High-strength forged steel
• 6° tapered sprocket shaft
• Increased contact area
• Factory crank sensor compatible
• Machined timing notches
• Standard S&S tapered crankpin
• Easy serviceability
• Balanced to stock HD 80"
• Complete assembly included
• Manufactured in U.S.A.
• MPN: 320-0603