- This 4-5/8" stroke 8-1/2" diameter flywheel assembly replaces the original flywheels in S&S 124" V124 engines for 1984-99 HD big twins
- Flywheel assembly is three piece design
- Pinion and sprocket shafts are forged as part of the flywheel
- The only joints in the assembly are where the 1.671" diameter connecting rod crankpin is pressed into the flywheels
- Flywheels are CNC machined from heat-treated, closed die, steel forgings, which are 114% stronger than late style stock steel flywheels
- Fully assembled with premium quaility S&S heavy duty 7.667" connecting rods, with full width wrist pin ends, and dynamically balanced
- Assembly is trued to less than .0005" runout on pinion and sprocket shaft bearing surfaces, making them capable of higher rpm