S&S Cycle 635 HO Gear Drive Cam Kit - 330-0335

Item # : 280106

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  • Manufacturer: S and S Cycle


S&S Cycle 635 HO Gear Drive Cam Kit

  • Camshaft gear drive kits increase valve timing accuracy by eliminating timing chain lash and loosely fitting stock chain drive
  • Reverses the rear cams 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
  • Cam bearings and gaskets must be replaced when installing new cams
  • Made in the U.S.A.
  • Kits require high-performance valve springs.
  • 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.
  • High power cam for modified engines, increase compression, high lift springs and large bore throttle body required
  • For best results requires ported heads, low restriction intake/exhaust
  • RPM range 4000-6500
  • Intake:
  • Open - 19.5d
  • Closed - 43.5d
  • Duration at .053 - 243d
  • Valve Lift - .635in.
  • Exhaust:
  • Open - 58.5d
  • Closed - 37.5d
  • Duration at .053 - 276d
  • Valve Lift - .635in.

Manufacturer Part Number: 330-0335