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S&S® 4-5/8" Stroke Flywheel Assembly W/O Sprocket Shaft Bearing Race For 2007-'16 Non-Balanced HD® Big Twins and 2006 Dyna Models. Replacement parts for 120R/120ST engines.
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Stock pistons in 2007 and later engines require rods with tapered wristpin ends. The S&S® replacement Flywheels for 2007 and later 120R and 120ST engines have 7.575” length connecting rods. Flywheel assemblies supplied with sprocket shaft bearing race installed are compatible with stock roller style sprocket shaft bearings.
When installing these flywheels in a Harley case, use the Harley Piston oiling jets. The S&S piston oiling jets are longer than the Harley oiling jet and the piston will crash into the jets causing them to break.