S&S Cycle SSC Flywheels - 320-0355

This 4-3/8" stroke 8-1/2" diameter flywheel assembly replaces the original flywheels in 2003-'06 HD® internally balanced big twin engines, increasing the stroke from 4" to 4-3/8". Sprocket shaft does not have a stock style bearing race pressed on.

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

Flywheels are CNC machined from heat-treated, closed die, steel forgings, which are 114 percent 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

The only joints in the assembly are where the 1.671" diameter connecting rod crankpin is pressed into the flywheels

S&S Cycle 00-06 BT 4-3/8in Stroke Flywheel Assembly w/o Sprocket Shaft Bearing Race

This flywheel assembly is for crankcases with Timken® sprocket shaft bearing

Pinion and sprocket shafts are forged as part of the flywheel

Pinion shaft has sprocket to drive balancer chain

Flywheel assembly is three piece design