carburetors

  1. Rhino2131

    In NEED of one of these

    I am in need of the #2 float bowl on a 1978 cb 750 carb. If anybody has one available, please let me know. Thank you, Rhino
  2. H

    Main jet recommendation

    1991 nighthawk 750 with keihin carbs (4). I removed the factory airbox and installed "pods" I had the carbs rejected and it's bogging really bad to point of dying. The main jet is a 120 and the idle jet is 38 Need suggestions so I don't have to go .5 at a time. In addition do I need to change...
  3. Rhino2131

    1978 carbs

    Hello, I am building a 1978 cb 750. Next up for me is the carbs. I have 2 of the 4 float cap covers. One of them had a 1 on it and the other has a 3.4 on it. When getting the other two float covers do I need one of each that I already have? Just making sure they all face towards the center of...
  4. R

    Dust Rubber Boots

    Can you buy after market dust rubber boots that go on the choke rail, 4 off
  5. P

    is fuel pump needed

    is it better to a carb with the fuel pump, or just disregard this plus connect the tank directly to the carb
  6. 7

    New Petcock

    need new petcock and i have been looking around on Ebay and other sites. can someone recommend best place to get a quality part per your experience. Thanks
  7. C

    CB900 2 QUICK QUESTIONS! PLEASE HELP

    i apologize as I was not able to find a cb900 forum, i know they were only here in the US for two years but i figured that they must atleast use a very similar design for the carbs to a same year cb 750, i just have two quick questions and they are in the video i posted, again these are not...
  8. D

    First bike. High idle issues.

    So, I have an 82' 750c that i just rebuilt the carbs on. i got everything put back together after following this PDF https://www.cb750c.com/publicdocs/SeanG/Honda_Carb_Manual_revG.pdf after re-attaching the carbs to the bike, and starting it, the bike idled at 4k. adjusting the pilots screws...
  9. D

    1994 DOHC

    Anybody had any success with dumping the air box and fitting K&N’s to individual carbs? Keep on hearing that it can not be done and still have a sweet running engine. I do not believe in “can not be done”.
  10. D

    Help with installing carburetors

    Any tips on installing a carburetors as in should I put the rubber intake on the motor first or the carburetors first I tried to carburetor way and I had trouble, any help would be appreciated
  11. 80750f

    Airbox-Carb Boot Installation

    Bike: 1980 CB750F Hello everyone, so this weekend project initially began as a quick and easy carb clean- my first one mind you. That was all fine and dandy but the thing is, the carbs are back on the bike but I can’t get the boots back in their proper position- with them sealed around the...
  12. J

    VB52A Carb - Cant' find new Emulsion Tube

    As i was rebuilding the Carb, one of the holders was stuck. During the fight, the Emulsion Tube got damaged. Therefore, i desperately need a new Emulsion Tube, however i cannot seem to find this specific model any where. Can somebody please provide me some help? Jakob
  13. K

    Carb or maybe something else help

    Hey folks. My user name should explain enough. I’m an electrician so I understand when mechanical knowledge lacks and this is true for me here. I recently picked up a couple bikes. Not sure when last run. I cleaned up the plugs and they cleaned well and see I have good spark. No compression test...
  14. S

    84 cb750 nighthawk

    Anyone know if the carbs from this bike will work on a 79 cb750k dohc thanks
  15. H

    82 custom just will not ideal below 5000

    Short story, I NEED HELP! Longer story. Have a 750 we just picked up. starts right up but after 10 seconds just start going up, likes to run about 5250. checked valves, installed new boots from carbs to intake, cleaned out carbs, like i said she starts right up. Where should i be looking? After...
  16. Rampton

    Advice required on how to strip and clean bank of vb52 carburetors .

    Hi to all, I have a 1981 cb750 Dohc, with help from members I have been trying to get her running. So far charging system sorted compression test 130 average, valve clearances done. Pick up coils and plugs changed. Had carbs cleaned (sonic) and I have removed carbs and changed jets needle valves...
  17. Z

    Drinking to much fuel and looses power on high rpm.

    Hi Recently I have tuned up my cb750f with new pod filters and changed the jets to 35 to 40 and 115 to 125. Raised the needles with 1 shims. Megaphone exhaust. Now it’s drinking fuel like hell. Consumed 5 litres fuel in just 6 or 7 kilometres. Please advise what to do. On the other hand after 6...
  18. 9

    Airbox rubber insulator orientation

    There’s a flat section to the rubber does that face down?
  19. deeveeance

    CB750C Carb 2 leaking fuel, entire bike runs only on choke

    Hello all, picked up a project for only the cost of the uHaul and gas by trading an unused laptop. 1982 CB750C Previous owner had new baby, had the bike he wanted to work on, no time, sky is blue. He mentioned a gas leak, and he thought it was the bowl gaskets. Had the part, no time...
  20. C

    Cb 900 bog

    Hi gang, I have a stock 900 custom that i have been going over little by little. Im still having an issue witth it bogging under 3000 rpm. Over 3000 grand it rips but not so good at take off and up to 3 range tank screen clean, carbs clean down to the tiny orifices in the throat, no vac leaks...
  21. Willishal

    original jets and floats

    i am rebuilding carbs on a 74 cb 750. have cleaned and gone through the carbs and cleaned, all the jets look good. Floot bowls have no holes and also look good. besides gasket and o rings on fuel t's...should i replace internal carb parts with new aftermarket carb kits....?
  22. B

    Converting four to two

    Hello, I have an 1981 honda cb750k that I have been considering converting the carburetors from the four to two and would like some insight on what's the best option thanks
  23. K

    Source Help for These Keihin PD 41A Oddball Throttle and Choke Shaft Parts

    Deep cleaning a set of very dirty PD41A carbs for a '77 CB750 K7 project and found parts not shown in the factory parts fiche anywhere. Throttle shaft opening in the carb body has a sleeve / bushing that fell out after an ultrasonic bath. Carb was so dirty I didn't notice the sleeve or the...
  24. A

    1982 CB750C dies with sudden throttle

    Hello everyone, I have been a lurker of this forum ever since I got my CB750. I have an annoying issue which I have been dealing with, but I hope to find the source of the issue. The bike was in pretty rough shape mechanically when I picked it up just from lack of use. It has 12,000 original...
  25. E

    1981 cb 750 with pod filters

    My son just bought a 1981 cb750 the previous owner" bobbed". It has no airbox and is running pod filters . I am having trouble getting it to idle. Has a aftermarket exhaust also. Could it not be causing enough vacuum to draw fuel at idle? Bike runs great above idle.
  26. 8

    Idle problem Honda CB750 81

    I have a 1981 Honda CB750C and I am a new rider and I need some help. I’m having troubles with my choke. Trying to start the bike is difficult I have to find a sweet spot with the choke in order for it to start and as I let it warm up and try to push the choke back in it completely shuts off...
  27. S

    Pulling WAY too much fuel under load (upon take-off)

    I helped my son pick up an 83 CB750 Nighthawk last year, supposedly with 4,200 miles on it. It had been sitting awhile, so naturally the carbs were left with crap-gas in them and were in rough shape. It actually ran and went down the road, but low-end was pathetic and it kept wanting to high...
  28. S

    New improvement fix on leaky float seats on Honda cb750k

    Hello fellow cb750 fans. I posted a thread to this approach a while back that addressed the issue of debris in float seats in carbs on most float type carbs. But I think this would apply on all fuel system With fuel injection you have no float, but still need to be aware that loose particles...
  29. A

    Carb fuel question and fitment

    Bought a set of carbs from eBay that the seller assured me would fit my 79 CB750F SS. There is a "T" fitting along the fuel rail between #3 and #4 carbs. Should this be capped? Pics for clarity. Also, there's a capped nipple on the throat of #2 carb. Does this supply vacuum for the slides in...
  30. C

    Hanging throttle/high idle

    Edit: originally posted this in SOHC carb thread by mistake - not sure how to remove that post. Hello all! I have been racking my brains on a recently purchased 1981 CB750K, with the VB42 carburetor set up; original air box and original breather tubes. The bike was sold to me in 'as is'...
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