S&S Cycle Cam Kit - 635G - Twin Cam

Brand: S&S Cycle
MPN: 330-0335
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S&S 635G CAMSHAFT KIT Camshaft gear drive kits increase valve timing accuracy by eliminating timing chain lash and loosely-fit stock chain drive

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

Kits include cams, inner gears, outer drive gears, inner and outer bearings, gasket and instructions

Material must be removed from the inner surface of the stock gear cover to install S&S gear drive cams

A hydraulic press and other professional-level tools are required to install these kits

S&S recommends that adjustable pushrod/cover kit PART #0928-0017 be used

Cam bearings and gaskets must be replaced when installing new cams

Cams are also available with inner gears only; intended for cam replacement for motors that have already been converted to an S&S gear-drive system

Made in the U.S.A.

Cams for 06 Dyna and 07-16 Twin Cam are for use with models with hydraulic tensioner chain-drive system; require high-lift valve springs

Made in the U.S.A.

Gear drive cams are for 95/96/103/110 cubic_inch engines with compression ratios from 10:1 to 10.75:1

Chain drive cams are for 95" or larger engines with compression ratios between 10.0 and 10.75:1

Strongest from 3,000-6,000 rpm

High-lift springs and adjustable pushrods required


Kits require high-performance valve springs when installed in 99-04 models.

Installer must check coil bind, valve-to-valve clearance and valve-to-piston clearance.

Due to the inherent characteristics of gear drives, you may experience more valve train noise.


Installer must check coil bind, valve-to-valve clearance and valve-to-piston clearance.



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