Those are 'round top' carbs from a 71-76 750K or 75-76 750F. Functionally those are all the same. The numbers stamped on the holder will tell you what year and model so you know what jet sizes and needle numbers they came with originally, but the jets and needles interchange.
That's what I was curious about. Good to know. The guy that did work on it back in '09 (last time it was on the road) said he bought it brand new. Now I'm doubting alot of things about him and what he did.
Well your carbs are definitely Honda but not from a 1977. As Danny said 71-76....so are you sure you have a 77 and not a 76? What year model does the vin tag show on the steering neck?
Those carbs are 28mm
To help identify your bike.....
This is a 1976 K6 specs and picture.
https://bikez.com/motorcycles/honda_cb_750_f_1976.php
https://www.motorcyclespecs.co.za/model/Honda/honda_cb750k_76.html
1977 cb750 k7 specs and picture
https://www.autoevolution.com/moto/honda-cb-750-four-k7-1977.html
100% sure it's a '77. The guy who worked on it last was a bit lackluster in a few departments.
I am glad to find out the size, for now I know I need to buy something else. I'm thinking a Mikuni 32mm or so if they make one for this bike.
Any suggestions on what to buy fellas? Obviously want to stick around 32 or so.
Bike is a '77 as mentioned.
Work that has been done is:
Carillo Connecting Rods
WiseCo Pistons 11.5 (836)
Super Studs (Cylinder Studs)
CX-11 Cam
New Cush Drive Bearing
Crankshaft Lightened and Balanced
Super Gasket Set (65mm)
Treated Main Bearings
Treated Rod Bearings
Adjustable Cam Sprocket Kit
Super Flow Valve Set
Cast Guides
Spring Set
Primary Chains
Tsubaki Cam Chains (Cryo)
Primary Chain Tensioner
Deluxe Bore & Hone .65 Over
Alternator Lightened and Balanced
Undercut Transmission
Cush Drive Rebuild
Combustion Chamber Blending Modification
Head Option #2 (Both sides of head surfaced, guides replaced and reamed, valve job)
Line Lap Engine Cases
Refurbish Electric Starter
Rebuild Output Shaft