Compression Release mechanical
Club Member
Joined: Jun 2007
Posts: 45,429
Likes: 2,898
From: Bedford UK
The main pro is they reduce the start-up load on your starter motor. This in turn means there is no need to use a larger starter when making substantial mods to the engine. I don't know of any cons! I have had an S&S engine in my bike for almost 4 years and have automatic CRs, which are fine.
Road Master
Joined: Sep 2008
Posts: 811
Likes: 99
From: Hopewell Twp, PA
I'm on the fence now about whether to get the ACRs or not. On my 09 SG, I am putting the 103 kit stage II kit in. The dealer is going to do the work. The dealer says that I don't need them, but I don't want to have starting problems either. The parts don't seem like they cost that much, but I don't know how much to install them since it looks like some drilling needs to be done.
Seasoned HDF Member
Joined: Apr 2006
Posts: 10,675
Likes: 95
From: Billings,Mt.
Ask your dealer if they can machine the heads and how much will the labor cost.
Seasoned HDF Member
Joined: Mar 2008
Posts: 9,384
Likes: 1,776
From: Central Texas
For what it is worth, unless your compression is jacked
way the heck up I don't think compression releases are
needed I am running 10.5:1 but I have 1.4 kw starter
but, it is over kill. My starter cable rotted into inside the
insulation and I thought my starter had craped out but,
the stock starter was having no problem what so ever
with my 10,5:1 compression.
way the heck up I don't think compression releases are
needed I am running 10.5:1 but I have 1.4 kw starter
but, it is over kill. My starter cable rotted into inside the
insulation and I thought my starter had craped out but,
the stock starter was having no problem what so ever
with my 10,5:1 compression.
Seasoned HDF Member
Joined: Mar 2008
Posts: 9,384
Likes: 1,776
From: Central Texas
and how hard would they be to remove clean and replace,
just wondering?
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Ultimate HDF Member
Joined: Jan 2008
Posts: 6,532
Likes: 132
From: SoCal
I have had my ACR's installed for 3+ years and I have had no need to remove, clean or replace. Original battery and starter, 195 psi cranking pressure. I would do them again any time I had heads off any bike as they work seamlessly with no operator input and I have had ZERO problems with starting in any way.
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Elite HDF Member
Joined: Apr 2009
Posts: 4,082
Likes: 11
From: Long Island, NY
+1 When I went to a 117" in my FXDL, we installed the S&S Manual Compression Releases, with the single **** and it's worked fine.
The main pro is they reduce the start-up load on your starter motor. This in turn means there is no need to use a larger starter when making substantial mods to the engine. I don't know of any cons! I have had an S&S engine in my bike for almost 4 years and have automatic CRs, which are fine.
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