Topic: My new Cb550k - Father and Son project

[Bellard]

Me and dad sitting here trying to figure out how and in what order the gaslines hookup to the Carb and petcock. Air cleaner I might be able to figure out but without knowing how it hooks up....

[Bellard]

Ok correct me if I'm wrong you have two ports on petcock not sure about this considering we need to order one. But if there's 4 ports I'm stumped. Me n dad just trying to get her running.

[db22]

If your carbs are like mine, and I think they are, you have only one gasoline input to all four carbs.  It's on the left, as you're sitting on the bike.  If your petcock has two outlets, just plug one with a short piece of fuel line plugged with a screw, and feed your real fuel line to the input.

[Bellard]

All four carbs have 1 hookup.  I don't have a petcock for my 550 yet but the cb350 I have has two ports on it. Can I temporary use this one and if so how do I go about hooking up four carbs with two petcock lines? A tee?

[Bankerdanny]

Yep, the '77 is a single out from the petcock and single in to the carbs.

If it fits you could use the 350 temporarily, the T should do the trick. I bought a new petcock assembly from Powers Edge Motorsports in Michigan. it wasn't very expensive, about $50 with shipping I believe. It was worth paying extra for a new assembly rather than getting a 30+ year old one.

Figuring out the carb linkage was the most difficult part for me, and that was despite having the exploded parts diagram and pictures of the carbs before I separated them. I should have taken far more pictures. Live and learn.