4-3/8in. Stroke Flywheel Assembly with Timken Bearing Upgrade. Fits Twin Cam Dyna 2007-2017 & Touring 2007-2016

Features & Benefits:-

* Without Sprocket Shaft Race for use with the Timken Bearing Upgrade.

* Replaces the Stock Crankshaft in 96ci,103ci & 110ci Engines.

* OEM style Tapered Wristpin Ends allow use of OEM Pistons.

* 7.659in. length Connecting Rods.

* Heat-treated 4140 material is harder & stronger than stock.

* Harder material eliminates the need for Thrust Washers.

* Larger diameter Crankpin provides increased Crank-Pin clamping force.

* Integral Main shafts, Eliminates two potential weak points.*

Consistent balance & precision machining.

* Truer Flywheels & Less Vibration.

* Reduced Main shaft deflection at high rpm means Less Vibration, reduced piston & rod side thrusting & events oil pump damage.

* Fully compatible with Gear Drive Cams.

* Capable of higher rpm giving More available power.

* Trued to within .0005in. Run-Out.

* Rod Bearings have 20 Rollers vs 18 Stock.

Proudly Made in the USA by S&S Cycle!

* Upgrades OEM # 23729-07 & 24100021