S&S Cycle 320-0459 3-Piece Flywheel - 4 1/2in. Stroke engine-power-up-kits BIG BORE KIT FOR M-EIGHT

BIG BORE KIT FOR M-EIGHT 114in

All kits include necessary gaskets

Original engine serial numbers are retained

(99-06) or 110in

000 strokes during R&D testing

S&S Cycle 320-0459 3-Piece Flywheel - 4 1/2in. Stroke engine-power-up-kits BIG BORE KIT FOR M-EIGHTWithout 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