S&S, Easy Start 625 (IG) cam gear set

.625" valve lift. IG = Gear driven crankshafts with internal gears only.
95" onwards with compression ratio of 10.0:1 to 10.8:1.
Easy Start crankshafts 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 camshaft with a spring-loaded compression release cam inside the crankshaft. After starting, the compression release cam retracts by centrifugal force. The only difference is during starting, as you will now be able to effortlessly start your Big Inch engine electrically, without the need for large batteries and/or starter motors. A standard starter motor and battery are sufficient. Once the engine is running, the crankshafts operate as normal crankshafts, with no loss of power, torque or any other parameter.
Note: The installation kit required for the Easy Start crankshafts is included only in the complete kits (IOG). The installation kit for this kit is available separately as 531268 and is compatible only with gear-driven models.
Note: Only the 551, 570, 583, 585, HP103 and MR103 series crankshafts are direct bolt-in; all others may require clearancing and need high lift valve springs.
Note: Not compatible with kick-start models.
Note: Only crankshafts 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
07-17 Softail; 06-17 Dyna; 07-16 FLT/Touring (NU)


Material
Steel


Packaging weight
1.799 kg


HS Code
87141090


Motorcycle family
DYNA, SOFTAIL, TOURING, TRIKE


Original name
S&S, Easy Start gear drive 625 camshaft set (IG)