When to Use Compression Release?
When to Use Compression Release?
Ultimate HDF Member
Joined: Jun 2009
Posts: 6,899
Likes: 3,412
From: OH
That is a number that gets thrown around a lot. Really depends on the cam as the motor never sees the static number. What it sees is corrected compression or CCP. Big boyz has a calculator for comparing cams and their ccp numbers.
Road Master
Joined: Sep 2011
Posts: 1,033
Likes: 41
From: Mount Airy, North Carolina
What year is your bike. 2013's 103's already have automatic compression releases. If you look between the heads, if you see a wire coming out from under the lower rocker box cover in the center going back into the wire loom around the throttle body, that is the wire going to the ACR. also if you take out the spark plug and look through the hole in the head behind the spark plug, you can see the round ACR sticking up from the head.
Ultimate HDF Member
Joined: Mar 2012
Posts: 6,129
Likes: 143
From: Santa Cruz
Stock 103s crank about 195 ccp and the motor company puts auto compression releases in them. They wouldn't do it if they didn't have to. So ya ought to have them and use them if ya are are cranking near 190+...
Last edited by 0ldhippie; Apr 20, 2016 at 09:15 AM.
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