Chain question

[musicman]

The sprockets are worn on my 550e, so I'm in the process of replacing those, as well as upgrading to an o-ring chain. I was talking to my old man about chains and he said "I have a new chain you can have, used to be the best of the best and was really expensive". He has a '79 CBX built to the gills for drag racing, and just didn't want a stiffer o-ring chain I guess. Anywho, it's really heavy duty, fits my sprocket so it must be a 530 chain, the rollers look like they're copper or something, the part number on the links says "RK 50S0". Don't have the box.

Any info on this chain? It's 100x's the chain I have on there now so I'll probably use it, but I'm curious if it's as good as he says I guess. Not that it matters on my baby bike

[Nessism]

Google doesn't turn up much on that model. It must be old. Hope the old man doesn't want much for it.

Oh, and O-rings chains are superior. I don't understand your comment about not wanting one.

[musicman]

His bike isn't street legal, and he said something about the non o-ring chains having less drag, or at least something to that extent. He just gave this chain to me, free. And yeah, I asked because I wasn't finding much either.

Old man's bike:

[Nessism]

What kind of carbs are those? Some sort of VM Mikuni?

[musicman]

He told me once, can't remember exactly. Back in the day there was a company called Ricks Tricks I guess (something like that?) and they offered a carb upgrade kit, I think they're a smooth bore VM of some kind, 29mm? It really needs much bigger carbs, they're too small for the setup. Nice changing main jets in them, there's a plug in the bottom of each bowl you remove to access them. I hate working on that engine too, the cams are so radical that he had to go to under-bucket shims, so you have to pull all 4 cams to do the valves.

Funny thing about that bike is how much is done to it and it still appears stock-ish. The frame is chopped, front end raked, fixed longer swingarm, has the factory euro kit too.

[steve murdoch]

I have a set of those Ricks Tricks 29mm carbs that i just finished overhauling.
So much easier than working on the stock Honda ones.
Very cool CBX your dad has there, Musicman.
How big is the engine that you had to go shim under bucket?

[musicman]

I'm not sure exactly, but I seem to recall it being close to 1300cc.