Topic: CB350/360 petcock on a 550F tank?

[Scott S]

 I'm working on a CB550F and even though the bike is a '76, apparently the tank is from a '77. It uses the single outlet 16mm x 1.5mm petcock.

 I have one, but it's missing the filter screen and the fuel tee. The tee is no problem. The screen is about $30-35 but I can't seem to get the nut off the petcock to install a new seal and filter sock. Plus, I'd rather forego the tee if possible.

 I DO have a brand new, genuine Keihin dual outlet petcock that was used on the CB350/360, among others. It has the sediment screen and a brass filter on the reserve pipe, plus dual outlets.
 It looks like it would hang down lower than the 20mm petcock used on the '75-76 models, but is actually slimmer.

 Pictured below, left to right (when you click on it....top to bottom, otherwise): 20mm '75-76 petcock, 16mm CB350/360 petcock, 16mm '77 550F petcock.

 Has anyone used the dual outlet petcock on a '77 550F tank? Everything clear OK?

 How do I get the nut off the single outlet 16mm petcock to install a new filter sock? It just spins in place. I've tried regular and reverse threads. This petcock was on the tank when I got it. It was removed for paint.

[Scott S]

Here's the filter I'm talking about. Do it and the O-ring just sandwich in between the petcock and the tank?
 It's #3 in the diagram.

[Scott S]

 It's awesome being a parts hoarder.

 Ten minutes after posting this I found a good used sock filter for the single outlet petcock. It just pushes down on the tube.

 AND.... I found a brand new aftermarket 16mm petcock that I forgot I bought.

 I'd still like to know if the dual outlet CB350/360 petcock would fit and clear everything.

[bryanj]

Only way to know is fit it and see