640 Easy Start camshaft kit

Allows easy starting by initially reducing crankshaft compression; once the engine starts and RPMs rise, the decompression cam retracts centrifugally and the engine runs normally, with full compression and no loss of performance
Designed for 95"/96"/103" and 110" engines with a compression ratio between 10.5:1 and 11.5:1; maximum performance between 3,000 and 6,000 rpm
Manufactured in the USA
Installer must check spring stop, valve-to-valve clearance and valve-to-piston clearance.
Not suitable for models with OEM decompressors.
High-lift springs and adjustable pushrods are required.



Specifications


Brand
S&S CYCLE


Supplier reference
330-0331


Application
Exhaust, Intake


Features
Installation kit included


Intake closure
43,5°


Exhaust Clamp
37,5°


Intake duration
243°


Exhaust duration
276°


Intake valve lift
0,635"


Exhaust valve lift
0,635"


Model
Easy Start


Product name
Camshaft Kit


Type
Chain


Units
Kit


Open intake valve
19,5°


Open Exhaust Valve
58,5°


Version
635 Series