・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 CAMSBolt-in cam for 103” and 106” Big Bore Twin Cam motorsGreat for lighter bikes with strong power from 3500-6000 rpmUse with stock heads (up to 10.2 compression) and low restriction intake and exhaustMR103 CAMSBroad torque curve improves output over stock over the entire rpm rangeBolt-in cam for 103” Twin Cam motorsUse with stock heads and low restriction intake and exhaust475 SERIES GRIND CAMS (OES)Original equipment specificationsBolt-in cam with stock cam timingDoes not require tuning509 SERIES GRIND CAMSStrongest from 1，000-4，500 rpm180 psi cranking compression；no need for compression releasesBolt-in cams for 88 CID engines with stock compression rationGreat low and mid-range torqueLower lift allows them to be bolted into stock 96”-106”06 engines with stock valve springs510 SERIES GRIND CAMS510G/510C cams are designed as bolt-in cam for 88”， 95”， 96”and 103”engines with compression ratios below 9.7：1Stock pushrods and valve springs acceptableStrongest from 3，000-5，000 rpm551 SERIES GRIND CAMSDesigned as bolt-in cam for touring bikes with compression ratio between 9：1 and 9：9More power across the rpm range， with improved low and midrange torqueStrongest from 1，000-4，000 rpmCan be used with stock pushrods， springs and lifters99-04 models require high lift springs
・HP103 SERIES GRIND CAMSBolt-in cam for 103” and 106” Big Bore Twin Cam motorsGreat for lighter bikes with strong power from 3500-6000 rpmUse with stock heads (up to 10.2 compression) and low restriction intake and exhaustMR103 CAMSBroad torque curve improves output over stock over the entire rpm rangeBolt-in cam for 103” Twin Cam motorsUse with stock heads and low restriction intake and exhaust475 SERIES GRIND CAMS (OES)Original equipment specificationsBolt-in cam with stock cam timingDoes not require tuning509 SERIES GRIND CAMSStrongest from 1，000-4，500 rpm180 psi cranking compression；no need for compression releasesBolt-in cams for 88 CID engines with stock compression rationGreat low and mid-range torqueLower lift allows them to be bolted into stock 96”-106”06 engines with stock valve springs510 SERIES GRIND CAMS510G/510C cams are designed as bolt-in cam for 88”， 95”， 96”and 103”engines with compression ratios below 9.7：1Stock pushrods and valve springs acceptableStrongest from 3，000-5，000 rpm551 SERIES GRIND CAMSDesigned as bolt-in cam for touring bikes with compression ratio between 9：1 and 9：9More power across the rpm range， with improved low and midrange torqueStrongest from 1，000-4，000 rpmCan be used with stock pushrods， springs and lifters99-04 models require high lift springs
・HP103 SERIES GRIND CAMSBolt-in cam for 103” and 106” Big Bore Twin Cam motorsGreat for lighter bikes with strong power from 3500-6000 rpmUse with stock heads (up to 10.2 compression) and low restriction intake and exhaustMR103 CAMSBroad torque curve improves output over stock over the entire rpm rangeBolt-in cam for 103” Twin Cam motorsUse with stock heads and low restriction intake and exhaust475 SERIES GRIND CAMS (OES)Original equipment specificationsBolt-in cam with stock cam timingDoes not require tuning509 SERIES GRIND CAMSStrongest from 1，000-4，500 rpm180 psi cranking compression；no need for compression releasesBolt-in cams for 88 CID engines with stock compression rationGreat low and mid-range torqueLower lift allows them to be bolted into stock 96”-106”06 engi...
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※Kits require high-performance valve springs (except 509G and 510G) 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.※Exempt per Carb Executive Order (E.O.) D-355-14
※Kits require high-performance valve springs (except 509G and 510G) 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.※Exempt per Carb Executive Order (E.O.) D-355-14
※Kits require high-performance valve springs (except 509G and 510G) 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.※Exempt per Carb Executive Order (E.O.) D-355-14
※Kits require high-performance valve springs (except 509G and 510G) 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.※Exempt per Carb Executive Order (E.O.) D-355-14
※Kits require high-performance valve springs (except 509G and 510G) 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.※Exempt per Carb Executive Order (E.O.) D-355-14