S&S 561 Cam For Harley Big Twin Evo 1984-1999 Resources
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Installation (pdf)
S&S Cycle 561 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
561 Cam Info:
- Designed for 80-96″ engines at 9.5:1-10.5:1 compression ratios
- Strong midrange power
- 3000 RPM-5500 RPM
- Intake open/close 32°/40°
- Exhaust open/close 50°/26°
- Intake duration 252°
- Exhaust duration 256°
- Lift .560″






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