Thanks Terry, I'll have to pull mine apart and have a look before it warms up outside.
I wonder why Koni stopped making motorcycle shocks? They still make auto shocks in the Netherlands.
I found the US distributor for Ikon shocks and parts at http://www.ikonsuspensionusa.com
They have CB550 shocks (7610-1302) listed at $314.99 in their online store.
Koni decided to concentrate on car shockers and sold the manufacturing rights to their Australian distributor, who called themselves Ikon as a hint to their roots. The Koni's are good shocks for sure, (I've got them on three bikes) and as parts are freely available, if you're gonna keep your bike for a long time, they're cheap.
Greg, the Redwings are a "budget" shock, not very good, and not rebuildable. YSS (Taiwanese) are making reasonable quality shocks at budget prices, but their "lower end" shocks aren't rebuildable either. Cheers, Terry. 
Terry-
I have a couple of sets of Koni's that are supposedly rebuildable but it didn't seem so straight forward to me. These are the aluminum bodied ones btw. Some of the the internal rubber/plastic bits in mine had turned to goo. From what I understand (Ikon confirmed this) this is very common and it doesn't matter whether the shock was in use or sitting on a shelf. All the parts are gooped up including the foot valve which has many many little pieces and is supposedly tensioned at the factory for proper performance. How do you clean it? Well you take it apart and somehow put it back together recreating the factory setting. The fragile piston head on the internal shaft was also a #$%* to get off and I broke one in the process. Again everything was so badly gooped that the whole thing had to come apart. Hell even opening the shocks up is difficult as they often require a special spanner. Where do you get this spanner? Well you have to make it yourself of course. I spoke at length with Ikon and they have some of the parts for rebuild but not all. Koni themselves were completely un helpful with no info or parts. Bottom line is that I had a very different experience than you with the Koni's and I often see them for sale on Ebay with the "don't worry they are rebuildable" line but I have a couple of pretty looking paper weights laying in my basement saying otherwise. Ikons seem to be nice shocks but they aren't exactly cheap.
Yeah, I'm sorry mate, I should have specified that I was really talking about the Koni 7610 series shocks. The old alloy bodied (or even old steel bodied) non-adjustable damping shocks were rebuildable back in the 1970's and early 1980's, but I'm surprised that Ikon carry anything for them at all, and it's to their credit that they keep anything for 20+ year old shocks.
The problem with ancient alloy bodies and steel threaded rod guides is that electrolysis sets in, and as you say, they're almost impossible to separate, and I think that's why Koni went back to all steel bodies. I use an adjustable pin spanner that I found in a tool shop to open mine up, with no problems.
The Koni 7610 series shocks that have been around since the mid 1980's that come with adjustable damping as well as rebound, and are fully rebuildable are the same shocks that Ikon are still building, and all the parts you'll need to rebuild them are available from Ikon. As you say, all you've got now is some pretty looking paperweights, but considering their age, I'm surprised that you're surprised?
Eldy, the shocks we all bought from that guy in Colorado (can't remember his name, but he was a nice bloke) were German "Boge" shocks, made under license in Mexico. Boge were standard equipment on some European bikes, including my old BMW R100RS, so really nice quality and the tools for disassembling them came with them. I actually like them better than the old Koni's, for that reason alone.
Crispy, the Hagons are fine, and quite reasonably priced.
Mike, you can only throw so much money at a CB750 before you realize that despite all your efforts, it's still only a CB750.............
