Topic: 1976 cb550F

[captbt]

I have a 1976 cb550F motor with what I believe to be 1973 cb500F carburetor model# 627B.  Will this carb reduce performance?  I don't have the bike up and running yet, I am just looking for opinions on whether this carb will be fine or if I need to look for the correct model.

[geminimotors]

The carburetors are the same. The stamped number denotes the combination of internal parts- jets, etc. You can use those carbs and re-jet them to suit your bike- air filter and exhaust choices necessitate changes to the jetting.

[Accolay]

+1. It really depends on what you're running. Check out TT's spreadsheet from the Carb FAQ:

http://forums.sohc4.net/index.php?action=dlattach;topic=5410.0;attach=3002

[luap]

My buddy has close to the same set up. 72 500 frame 76 550 motor with same carbs listed runs fine