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Compression ratio for S&S 475

Started by KiwiRob, February 13, 2020, 11:28:18 AM

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KiwiRob

What would the ideal CR and/or CCP be for the S&S 475 in the stock 107, then later will be up grading to 124 when new bike guarantee runs out.........or sooner :SM: - Rob

To The Max

When i put my 475 in my 107 i left the comp alone bike was about two weeks old. it ran great until i stripped it down and put the 124 kit on. i set the comp at 11.1 and its all i need and runs nice on our aussie fuel. if you still want to raise the comp pull the heads and stick in a 30th cometic gasket.

KiwiRob

Thanks Max, I was planning to swap in 0.030 HGs, plus shaving the heads. - Rob

Hillside Motorcycle

Otto Knowbetter sez, "Even a fish wouldn't get caught if he kept his mouth shut"

KiwiRob


Hillside Motorcycle

Otto Knowbetter sez, "Even a fish wouldn't get caught if he kept his mouth shut"