S&S, Easy Start gear drive 640 camshaft set (IG) - 06-17 Dyna; 07-17 Softail; 07-16 Touring (NU) Shifter parts seals and O-rings necessary to

seals and O-rings necessary to rebuild most carburetors

- Trivalent plating eliminates need for anti-seize

348" cam lift

straight cut end

Acorn head

S&S, Easy Start gear drive 640 camshaft set (IG) - 06-17 Dyna; 07-17 Softail; 07-16 Touring (NU) Shifter parts seals and O-rings necessary to. 640" valve lift. IG = Gear drive cams with Inner Gears only. 95" up with 10. 5: 1 to 11. 5: 1 CR (stock in S&S 124" engines). Easy Start Cams make starting easier by reducing the build up of cranking pressure in the cylinders during starting. This is done by lifting the exhaust valve slightly of its seat, with a spring loaded compression release lobe inside the camshaft. After starting the compression release lobe is retracted by centrifugal force.