S&S CYCLE Flywheel Assembly — 4-1/4" stroke, forged steel – 70-84 Big Twin, 79-83 Touring, 82-84 FXR, 84 Police

Precision-machined flywheels built to replace originals in S&S® 80" SH80 engines with alternator-style crankcases for '70–'84 Big Twin models. 🔧

• Flywheels are CNC machined from heat-treated, closed-die steel forgings for greater strength than cast iron or later steel designs.
• Replaces the original flywheels in S&S® 80" SH80 engines with alternator-style crankcases for '70–'84 Big Twin.
• Ideal for overhauling an S&S engine or building a custom engine using compatible crankcases and pistons.
• Features a 4-1/4" stroke, 8-1/2" diameter flywheels, and 7.440" connecting rods; may also be used in 88" engines with 3-5/8" bore cylinders.
• Made in the USA.