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About two weeks ago I received the new AIM Light Force clutch slave cylinder. Today, I tried to install it on my 2017 CVO Limited and am
very disappointed. Took the whole exhaust system off, removed the floor board, and then removed the OEM slave cylinder. The AIM
cylinder did not fit! I had to reinstall the OEM cylinder and bleed the clutch. What a wasted effort and time.
There are two problems with the AIM cylinder. At first I tried to connect the hydraulic line, screwed the flair nut in and it bottomed out
without tightening up the hydraulic line. The line was loose and could be moved in and out with the nut tightened all the way. Upon
further inspection, I noticed that The AIM cylinder has an SAE flair seat really deep inside. The OEM cylinder has a DIN flair on both the cylinder and the hydraulic line. The second problem is that the AIM casting is shorter where the flair fitting attaches, by half an inch. The hydraulic line is therefore too short to thread into the AIM cylinder when the cylinder is mounted to transmission side plate.
Attached are some pictures. I will be calling AIM next week. It is a shame because I was hoping the width of the clutch friction zone
would be wider with the AIM unit due to the different fluid volume ratios between the slave and master cylinder. (One inch piston on the
OEM unit and 1.5 inch piston on the AIM unit) A lighter clutch lever force was an added bonus.
Package labeling shows correct application
You have the same luck as I do. Every project I do myself I remind myself before beginning.
1). This will be harder than it looks
2). This will cost more than I think it will
3). Whatever can go wrong probably will
4). Make sure someone has already tried it on
YouTube.
Damn, well that answers a few questions they really screwed the pooch on that line fitting deal. May be an adapter fitting that would solve both the flare & boss length issue.
Looks like the black on the casting is bubbling too.
Last edited by TwiZted Biker; Nov 2, 2018 at 11:07 PM.
Perfect timing discovering this issue. I was just heading out to the garage to start installing mine. I guess I'll sit tight and see what response @HDFBagR receives from AIMS.
The installation could have actually gone worse. Instead of costing me three hours of my time, I could of had to pay someone
for three hours of labor. And if they did not take their time like I did, there could have been DOT 4 brake fluid spilled onto my tank
and lower fairing. It is messy bleeding the clutch master cylinder.
I took a look at AIM's website. It says "Quick Installation, no modifications needed."
The picture they show of the cylinder installed also shows an issue. They have the hydraulic line attached to the cylinder, but you
will notice that the line does not pass through the center of the notched out area of the transmission side cover. There is supposed to be
a square rubber bushing around the line were the outer cover goes over it.
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AIM Light Force
