S&S Cycle Gear Drive 635 H.O.Camshaft Kit

• While it is true that the early version introduced in 1999 was often not well suited to high performance applications, the later version introduced in the 2006 Harley-Davidson Dyna model, and later incorporated in all Big Twins in the 2007 model year, was vastly improved

• The S&S Camshaft Gear Drive Kit increases valve timing accuracy by eliminating timing chain lash and the loosely fit stock cam gears

• This is accomplished by replacing the stock cam drive sprockets and chain with light press fit S&S gears

• Because the chain, chain guides, and tensioner are eliminated, there is no longer a possibility for these parts to fail and damage other parts

• The S&S Camshaft Gear Drive Kit reverses the rear cam’s direction of rotation, providing additional operating clearance between cam lobes

• As a result, higher cam lifts are possible with the gear drive kit

• Popular camshaft grinds MR103, HP103, 635 H.O. now available for early Twin Cams

• Experience has shown that the new chain drive with hydraulic chain tensioners works well for all but the most demanding high performance applications

• The kit includes gear drive kit, gear cover gasket and cam bearings