CAM KITS & GEARS FOR TWIN CAM - S&S

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 00-06 Twin Cam are for use with stock splined drive gears; for installation on 99 Twin Cam motors you must purchase splined outer drive sprocket; S&S recommends that Andrews 4340 steel drive sprocket PART #DS-199175 be used

Cams for 06 Dyna and 07-16 Twin Cam are for use with models with hydraulic tensioner chain-drive system; cams 510C and 551C are bolt-in applications, all others require high-lift valve springs

Made in the U.S.A.

HP103 SERIES GRIND CAMS

Bolt-in cam for 103” and 106” Big Bore Twin Cam motors

Great for lighter bikes with strong power from 3500-6000 rpm

Use with stock heads (up to 10.2 compression) and low restriction intake and exhaust

MR103 CAMS

Broad torque curve improves output over stock over the entire rpm range

Bolt-in cam for 103” Twin Cam motors

Use with stock heads and low restriction intake and exhaust

475 SERIES GRIND CAMS (OES)

Original equipment specifications

Bolt-in cam with stock cam timing

Does not require tuning

509 SERIES GRIND CAMS

Strongest from 1,000-4,500 rpm

180 psi cranking compression; no need for compression releases

Bolt-in cams for 88 CID engines with stock compression ration

Great low and mid-range torque

Lower lift allows them to be bolted into stock 96"-106" 06 engines with stock valve springs

510 SERIES GRIND CAMS

510G/510C cams are designed as bolt-in cam for 88", 95", 96" and 103" engines with compression ratios below 9.7:1

Stock pushrods and valve springs acceptable

Strongest from 3,000-5,000 rpm

551 SERIES GRIND CAMS

Designed as bolt-in cam for touring bikes with compression ratio between 9:1 and 9:9

More power across the rpm range, with improved low and midrange torque

Strongest from 1,000-4,000 rpm

Can be used with stock pushrods, springs and lifters

99-04 models require high lift springs

GEAR DRIVE CAM KITS

NOTE: Kits require high-performance valve springs (except 509G and 510G) when installed in 99-04 models.

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

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

CHAIN DRIVE CAM KITS

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