ArTeeCat, thinking about the same thing for my '01 ZR800. The March edition of SnowGoer magazine addresses this in the Diagnosis section. They reccomend a $129.00 kit from CAT. They say it is well worth it.
I just installed the A.C.T. kit I purchased at Royal Dist. It was easy, ran about $90.00 U.S. It looks to be the same as the A.D.Boivin set-up. If we could get some snow I would let you know how it works. I am not sure what the Cat kit contains, but if you look at the new sleds, they just have a stop block bolted to the rail. It isn't really coupled, it's just a travel limiter. $129.00 seems kind of high for that, don't you think? I rode a 2002 ZL600 SS EFI with the factory "coupler" and it rode extremely smooth, so if I get even half the ride that the new sleds get, I will be happy. Going to Munising this weekend for 7 days-we'll see.
I installed the AD Bovin on to my 01 ZR6. Made a hugh difference in ride and handling.
Some argue on which is better the AC Kit or the AD Bovin Kit. Both are good, however I believe that AD Bovin is the better kit. They come up with the design first, thus preventing AC from replicating it. The AD Bovin couples the suspension in both directions. The AC couples it in one direction.
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