S&S Cycle 320-0459 3-Piece Flywheel - 4 1/2in. Stroke engine-power-up-kits 2007-2012 Harley Davidson XL1200N Sportster

2007-2012 Harley Davidson XL1200N Sportster 1200 Nightster

Reference C

(99-06) or 110in

1978 Suzuki RM400

Original engine serial numbers are retained

S&S Cycle 320-0459 3-Piece Flywheel - 4 1/2in. Stroke engine-power-up-kits 2007-2012 Harley Davidson XL1200N SportsterWithout Sproket bearing race Vast improvement over stock flywheels which shift out of true under heavy load. Heat treated 4140 material is 114% stronger than stock, eliminates thrust washer. Larger 1. 671in. crankpin, increased cross sectional area for increased crank pin clamping force. No welding required. Integral mainshafts, truer flywheels and less vibration. Notes: Strokes longer than stock will require S&S piston oiler set #31 2026. 07 up stock