S&S 4.375" Stroke Flywheel Assembly w/Sprocket Shaft Bearing Race (320-0352)
- This 4-3/8" stroke 8-1/2" diameter flywheel assembly replaces the original flywheels 2007-'16 HD big twin engines, when using stock pistons
- Wrist pin end of connecting rods is tapered like stock rods
- Sprocket shaft has the bearing race pressed on and is compatible with stock roller sprocket shaft bearing
- 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 7.659" connecting rods, with tapered 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 and fully compatible with gear drive cams