S&S, Easy Start 640 (CD) cam chain kit

.640" valve lift. CD = Chain Drive camshaft, complete kit with gasket and bearings.
95"-up with compression ratio of 10.5:1 to 11.5:1 (factory piston on S&S 124" engines).
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: Only the camshafts from the 551, 570, 583, 585, HP103 and MR103 series are direct bolt-in fits; the others may require grinding and need high-lift valve springs.
Note: Not compatible with kick-start models.
Note: Only 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
07-17 Softail; 06-17 Dyna; 07-16 FLT/Touring (NU)


Sales unit
Kit


Material
Steel


Packaging weight
1.724 kg


HS Code
84831021


Motorcycle family
DYNA, SOFTAIL, TOURING, TRIKE


Original name
S&S, Easy Start chain drive 640 camshaft set (CD)