106-4839 S&S Cycle 640GE Easy Start® Camshaft
S&S 640GE Gear Drive Easy Start Cams greatly improves valve timing accuracy by eliminating timing chain lash and allow stock starter to start any engine. The 640 cam is designed for engines of 95 inch or more with compression ratios between 10.5:1 and 11.5:1 used in S&S 124 inch engines.
Cam set includes inner gears and fits 1999-2006 Harley-Davidson® big twin (except '06 HD® Dyna®).
Note: These cams are not bolt in and will need special valve springs.
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