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    Early Honda CB750 question...

    I'm working on my bro's '69 CB750, and put in a set of later model carbs with mounting plate and mech linkage in place of the individual cable operated slides. It's essentially the same carb, but I noticed the air screws are different, they are hollow. These carbs came to us with NO SPRING UNDER THE AIR SCREWS, and the screws fully seated, not backed out 3/4 to 2 turns as you would expect an air screw to be adjusted. It doesn't seem to make much tuning diff if you back them out, either. Is fully seated the correct treatment?
    '82 & '83 GS1100e

    #2
    You might try the SOHC/4 site. They have a lot of Honda CB experts there that could answer your carb questions.
    1979 GS1000S,

    1982 Honda CX500 Turbo, 1982 Honda MB5 w/CR80 motor, 1977 Honda "nekid" Goldwing, 1976 Honda CB550F cafe', 1972 Honda XL250 cafe'

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      #3
      yeah, went there, didn't want to hassle with registration...it's sooo tedious, you know...
      '82 & '83 GS1100e

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        #4
        This is for a '72 K2
        ✓access the CARBURETOR (KEIHIN) schematic✓find Honda CARBURETOR (KEIHIN) spares easily✓CARBURETOR (KEIHIN) parts quickly delivered


        Figure out what carbs you have, dig around in here and you could at least answer the spring question.
        97 R1100R
        Previous
        80 GS850G, 79 Z400B, 85 R100RT, 80 Z650D, 76 CB200

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          #5
          Have they got the metering holes in the side of the airscrews? If so try soldering those holes off - they often let too much air in and you can't adjust the richness level enough.
          79 GS1000S
          79 GS1000S (another one)
          80 GSX750
          80 GS550
          80 CB650 cafe racer
          75 PC50 - the one with OHV and pedals...
          75 TS100 - being ridden (suicidally) by my father

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            #6
            This is supposed to cover 69 to 78 models so somewhere there should be info on all the carbs used.


            MY BIKES..1977 GS 750 B, 1978 GS 1000 C (X2)
            1978 GS 1000 E, 1979 GS 1000 S, 1973 Yamaha TX 750, 1977 Kawasaki KZ 650B1, 1975 Honda GL1000 Goldwing, 1983 CB 650SC Nighthawk, 1972 Honda CB 350K4, 74 Honda CB550

            NEVER SNEAK UP ON A SLEEPING DOG..NOT EVEN YOUR OWN.


            I would rather trust my bike to a "QUACK" that KNOWS how to fix it rather than a book worm that THINKS HE KNOWS how to fix it.

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