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Engine Mechanical TopicsDiscussion for motor builds, cams, head work, stripped bolts and other engine related issues. The good and the bad. If it goes round and around or up and down, post it here.
No, in the top of the head would be an automatic compression release.
Usually wired in line with the starter enable, so it opens only during starting, and closes when you release the starter button.
Last edited by rigidthumper; Mar 15, 2026 at 01:08 PM.
Right on. Thank you for clarifying.
So this component has not been wired in on either cylinder since I had the bike. Is there something in the S&S system and software that negates the need for this item? I also had concerns as to whether this item could result in an oil leak as this is wha originallyt brought on this specific teardown. Also, the spade connectors don't exactly appear OEM either.
The heads may have come from S&S already setup for the ACRs, and only used them to plug the hole? May not need them, due to normal CR or EZ start cams.
They wouldn't cause an oil leak, only a loss of compression & power if it failed.