S&S, Easy Start 551 (IOG) gear cam kit

.550" valve lift. IOG = gear driven camshafts with inner and outer drive gears. Complete kit with installation hardware, bearings and gasket.
Torque for factory 96" Touring bikes. The strongest cam from idle to 4000 RPM for 96" to 106" engines. Not recommended for compression ratios of 10:1 or higher.
The Easy Start camshafts make starting easier by reducing the build-up of compression pressure in the cylinders during starting. This is achieved by slightly lifting the exhaust valve off its seat by means of a spring-loaded compression release lobe inside the camshaft. After starting, the compression release lobe retracts through centrifugal force. The only difference is during starting, as you will now be able to start your Big Inch engine electrically with no effort, without the need for large batteries and/or starter motors. A factory starter motor and battery are sufficient. When the engine is running, the camshafts operate as normal cams, with no loss of power, torque or anything else.
Note: The installation kits required for the Easy Start camshafts are included in this complete kit (IOG). They are available separately as S&S spare parts for this kit under reference 503566.
Note: No Easy Start cam profile is a direct bolt-in for these 1999-2006 Twin Cam models. All will require and/or may require clearance grinding and high lift valve springs.
Note: Not compatible with kick-start models.
Note: Camshafts manufactured before January 2010 will require adjustable pushrods.
Note: Below 900 RPM a clicking sound may be heard. Adjust the idle speed to 1000-1100 RPM.


Specifications


Brand
S&S


Application
99-06 Twin Cam (Excl. 2006 Dyna) (NU)


Sales unit
Kit


Material
Steel


Packaging weight
2.682 kg


HS Code
84831021


Motorcycle family
DYNA, SOFTAIL, TOURING


Original name
S&S, Easy Start gear drive 551 camshaft kit (IOG)