Topic: '77 CB550F Carbs

[Bankerdanny]

Somebody refresh my memory. It seems to me that the F model didn't get the carbs that the K model did. That the '77 F has the same carbs as the '76 and earlier K's.

I am going to look at a basket case '77 550F tonight (because building a new bicycle, sorting out the fueling issues with my '77 GoldWing and the ongoing improvements to my '72 MGB GT aren't keeping me busy enough) and I am just doing some research on parts as my goal would be on the road by the Classic MC show at Road America June 8/9 or Chicago Mods vs Rockers the following weekend.

[fastbroshi]

Every F I've seen has the carbs with the teardrop lids.

[Bankerdanny]

Yes, that's what the one I just bought has in the box, with the 2 fuel inputs rather than the single line in that my '77 550K had.

[TwoTired]

All the Fs had the early style carbs as depicted above.   Each carb mount flange has 069A on the top right side, it specify it's unique internal jetting/adjustments for the F.  This primarily matters if you are using the stock induction and exhaust system.  Modify those and the stock internal setup won't work well.

[Bankerdanny]

Well, based on what i saw in the box o'parts that comes with the bike, it was previously running pods, so no airbox. The 4-1 is also not the stock exhaust. It appears to be a Mac.

I am going to track down a stock airbox. I haven't decided what to do about the exhaust, but the vision I have in my head for this bike includes a 4-2 exhaust rather than the original 4-1.