4in. Stroke Flywheel Assembly. Fits Twin Cam Dyna & Touring 1999-2002.

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Features & Benefits:-* Also Fits Dyna 1999-2005.* Also Fits Touring 1999-2006.* 2003-2006 motors can be upgraded to the stronger Timken Crankcase Bearing.* Heat-treated 4140 material is harder and 114% stronger than stock.* Harder material, eliminates thrust washer.* Larger 1.671in. diameter crankpin.* Designed with increased cross-sectional area for increased crank-pin clamping force – No welding required.* Integral mainshafts – Eliminates two potential points of weakness.* Consistent balance & precision machining – Truer flywheels & less vibration.* Reduced mainshaft deflection at high rpm – less vibration, reduced piston & rod side thrusting, prevents oil pump damage, fully compatible with gear drive cams.* Capable of higher rpm – More available power!* Trued to with in .0005in. TIR * Rod Bearings have 20 rollers vs 18 stockProudly Made in the USA by S&S Cycle !
MFR PART No: 320-0403

ROLLIES PART No: SS320-0403






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