Description
S&S Cycle 640 Camshaft For Harley Big Twin Evo
S&S has been in the business of making Harley-Davidson motorcycles go fast for a very long time, and their innovation in the world of bumpsticks is not exactly a secret. If you’re looking for more power from your bike, a cam is a wonderful place to start – especially if you’ve already done most of the easy ‘bolt-on’ modifications. Installing an S&S cam is a surefire way to make your mill suit your riding style while getting maximum output.
Features:
- S&S cams are tested on the dyno, street and track before being offered to the public
- With hundreds of hours of testing on each cam, you know you are getting the best cam S&S can produce
- Made in the USA
640 Cam Info:
- Designed for large-displacement engines (110″) with 10.5:1-11.5:1 compression ratio or smaller engines (96″-107″) with 11:1-12:1 compression ratio
- 3000 RPM-6000 RPM
- Does not require as much compression as 631 cam and provides more linear power delivery
- Less overlap and fast ramps build higher cylinder pressure
- Lower TDC lift makes installation easier
- Intake open/close 25°/60°
- Exhaust open/close 65°/20°
- Intake duration 265°
- Exhaust duration 265°
- Lift .640″
