Would like to know the pro's & cons of installing these? Have installed the high compression heads and bike cranks over fine without them.....

 

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.

 

One con is over time (carbon build up) is that they can start to stick. Remove, clean with carbon cleaner and brush and re-install...

 

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.

 

Ask your dealer if they can machine the heads and how much will the labor cost.

 

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.

 

If the manual CR will carbon up over time, will the ACR carbon up as well,
and how hard would they be to remove clean and replace,
just wondering?

 

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.

 

CRs of both types are installed rather like spark plugs, so they can be easily removed for service or replacement. Don't make a mountain of a molehill out of them!

 

+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.