Compensator issues
Re: Comp
Two downsides to changing the compensator/crank sprocket for a smaller one will do (like a 32T in place of a 34T) is make the starter work harder because it will have less leverage and TBW bikes will lose cruise control as it uses a comparison between transmission speed and engine RPM to engage.
Seasoned HDF Member
Joined: Aug 2011
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From: SW Ohio
I'm not here to argue physics because they can't be. My statement stands, the smaller compensator sprocket provides less leverage. Not all Twin Cams have compression releases and even in the case of a bike with ACR/MCRs it provides less leverage than the larger sprocket.
Seasoned HDF Member
Joined: Sep 2008
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From: San Diego, CA
I'm not here to argue physics because they can't be. My statement stands, the smaller compensator sprocket provides less leverage. Not all Twin Cams have compression releases and even in the case of a bike with ACR/MCRs it provides less leverage than the larger sprocket.
Your comment is irrefutable.. but that doesn't mean it's a big enough change to actually cause an issue... with ACRs, or Easy Start cams, I suspect it's a non issue, so small a change to be almost irrelevant....
When I changed my 124" engine from the 34 tooth OEM comp to a 32 tooth solid engine sprocket, there was no noticeable change in the starting sound, feel, or effort....
Certainly not technical or scientific data, and admittedly anecdotal information... but offered as my experience & opinion...
PS- A simply change to the gear ratio tables in the tune, will retain both the 6th gear light and the cruise control...
Last edited by hattitude; Apr 10, 2020 at 12:37 PM.
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