S&S, Easy Start 640 (IOG) cam gear kit

.640" valve lift. IOG = gear drive cams with internal and external drive gears. Complete kit with installation hardware, bearings and gasket.
95" and up with a compression ratio of 10.5:1 to 11.5:1 (standard on S&S 124" engines).
Easy Start cams 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 by centrifugal force. The only difference is during starting, as you can now effortlessly electric-start your Big Inch engine, without the need for large batteries and/or starter motors. A standard 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 kit required for Easy Start cams is included only in complete (IOG) kits. The installation kit for this kit is available separately as 531268 and is compatible only with gear-drive models.
Note: Only the 551, 570, 583, 585, HP103 and MR103 cam series are direct bolt-in; all others may require clearancing and need high lift valve springs.
Note: Not compatible with kick-start models.
Note: Only camshafts manufactured before January 2010 will require adjustable tappets.
Note: Below 900 RPM a clicking sound may be heard. Adjust the idle speed to 1000-1100 RPM.
Note: Special order product only. To order, contact your MCS sales representative.


Specifications


Brand
S&S


Application
07-17 Softail; 06-17 Dyna; 07-16 FLT/Touring (NU)


Sales unit
Kit


Material
Steel


Packaging weight
2.715 kg


HS Code
87141090


Motorcycle family
DYNA, SOFTAIL, TOURING, TRIKE


Original name
S&S, Easy Start gear drive 640 camshaft kit (IOG)