AIR BOX TO CARB RUBBERS CB550 - not sure which ones to use.

[Bryanj]

I seem to remember that on the K3 one rubber was a different angle to the rest But it might have been both outers

[Seabeowner]

Have both the F and K.
The inlet o/d on the Pd carb on the K is about 1mm smaller dia. (39mm on F and 38mm on K) (not great accuracy as measure using a £10 caliper from Lidl!)
On the K the rubbers to the inlet manifold are shorter and hence the rubbers from the carb to air box are longer.
Phil

[Nurse Julie]

Thanks for all the info and measurements chaps. The problem I have now is that the smallest ID is the shortest of the 2 types I have here, by about 2mm, which just isn't making sense. I know the easiest option would be to put carb rubbers on the carbs and use whatever fits in between the carbs and air box. The problem I have is that my engine, although just completely reconditioned, is still on the bench, the carbs, once again, just been refurbed are on the shelf and the frame has had it's tail end cut off and a hoop fitted but not welded in place yet and then it all needs powder coating. So, nowhere near building the bike yet. I'm trying to help out another forum member with carb rubbers etc but, I don't want to give the wrong ones away 

[Nurse Julie]

I started off with a K3 bike, in a non running mess, which had 069A carbs fitted to it, with the inlet manifolds inner box in a cardboard box along with the clutch and loads of other bits. The bike was not running and even had a 500/4 clutch cover fitted. Trig knows about the manifold and manifold rubbers, its just the air chamber and its rubbers we're not sure about.

[Nurse Julie]

We may have a breakthrough here chaps. Trig has just noticed that the larger diameter rubbers have a small groove on the inside which would fit over the small lip on the 069A carbs. The smaller rubbers have no groove on the inside. Although it is the bigger ID, it is a lot better fit than the other. He was just going to take a photo but he's buggered off up the pub, to get away from me and my carbs I expect