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 has a stock style bearing race pressed on for use with stock roller style sprocket shaft bearing.
Key Features
Brand Manufactured by S&S Cycle
Category Drivetrain
Type Flywheels
Specifications
Length 15 in
Width 12.25 in
Height 11 in
Weight 40 lbs
Rider Benefits
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 has a stock style bearing race pressed on for use with stock roller style sprocket shaft bearing.
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
Please review manufacturer details to ensure proper fitment before ordering.