S&S, 585G (IOG) gear-driven camshaft kit

.585" valve lift. IOG = gear-driven camshafts with internal and external drive gears. Complete kit with installation hardware, bearings and gasket.
Direct fit for 88" to 106" engines with a compression ratio of 9.7:1 to 10.5:1, and 106" to 124" engines with a compression ratio of 9:1 to 10:1. RPM range of 3500-6000 for 88" to 103" engines and 2500-5500 for larger engines.
The gear drive system is in fact a revolutionary, different and far more reliable construction. Especially in high lift/performance applications, compared with the factory chain drive design. A gear driven camshaft is stronger and does not suffer any of the mechanical problems associated with factory chain driven camshafts. The S&S gear drive kit will increase valve timing accuracy and therefore power, by eliminating timing chain slack and the loose-fitting stock cam gears. The only downside of gear drive is that you may experience a slight increase in mechanical noise; this is why the factory uses a chain. It has no other mechanical advantage. As the chain guides and tensioner are removed, there is no longer any chance of these parts failing and damaging other parts of the engine. The S&S gear drive kit reverses the rotation of the rear camshaft, providing additional operating clearance between the cams. As a result, greater cam lifts are possible with S&S gear driven camshafts.
Note: With the exception of the 475G and 510G camshafts, adjustable pushrods (such as MCS 503573) are required to compensate for the smaller base circle of the camshaft of these cams.
Note: It may be necessary to remove material from the inner surface of the factory gear cover before installing the S&S external drive gears.
Note: The S&S installation kit required (503566) for the gear driven camshafts is included in this complete kit (IOG).
Note: The use of camshafts with .625", .635", .640" and .675" lift will require grinding of the crankcase.
Note: Factory beehive-type valve springs on Dyna 04-17; Softail 04-17 and Touring 04-16 models will accommodate valve lifts of up to 0.590" and a valve seat force of 160 lb, up to 6200 RPM. Exceeding 6200 RPM or lifts greater than 0.590" will require high-performance valve springs.


Specifications


Brand
S&S


Application
99-06 Twin Cam (Excl. 2006 Dyna) with stock non-hydraulic chain tensioners (NU)


Sales unit
Kit


Material
Steel


Packaging weight
2.751 kg


HS Code
87141090


Motorcycle family
DYNA, SOFTAIL, TOURING


Original name
S&S, gear drive 585G camshaft kit (IOG)