carburetors

HELLO... Looking for info from Honda CB750 sandcast experts out there. Does anyone know how many of the early sandcast CB750 bikes were made/sold with the 5mm type throttle cables and 28 carb tops before they were recalled??? Also does anyone know why the 5mm throttle cables and carb tops...

Hi all, new guy Rob here. Writing about my '92 Nighthawk 750. I am in the process of removing the carb assembly and it will not budge from the engine. I removed the airbox and the choke cable. All the clamps are loosened, just about to fall off. I shot some WD40 around the intake boots and let...

Looking for proper procedure to set float height. Manual states height should be 15.5 mm, but unsure if this is with carbs lying flat or turned on side. Having difficulty getting 15.5 mm when carbs are on side? Thanks for any input.

I just bought my son a 1992 Nighthawk 750. He loves it. It has a ruff idle when 1st started when cold. Im planning on cleaning the carbs and syncing them. It has 24k miles on it. I already have a carb sync tool but not the adapter the screws into the carb intake. Does anyone know what size...

I have 2 carb sets, one is original to the bike the other I bought off eBay. They both have broken pilot screw tips that are broken off inside. I have tried the push pin trick but can get the tip down far enough to push them out. Anyone else have an idea other then replacing them?

HELLO... Can one of the early CB750 experts out there confirm the differences between the early 1969 4into1 throttle cable part numbers 17910-300-010 and 17910-300-030. As I understand/guess the 17910-300-010 cables had a larger end nipple (5mm) on the carb side that locks into the throttle...

Can anyone recommend a carb rebuild kit for a '79 CB750F Super Sport ? I have been told the '79 is *unique* in that it had metal tabs on the floats and "will need a flat top needle and seat", so I wanted to make sure I get the correct product. I would also like to replace the bolts with Allen...

Hello Everyone, So I removed my carbs for some cleaning while I awaited parts to arrive. Upon reinstallation, when I pull the clutch in to shift through the gears, I can hear the bike "surge" or what I describe as the rpms slightly increasing. Prior, when I pulled in the clutch to shift...

Hey there awesome people. John from little ole England here, Im looking for a little help with a fueling issue to the carbs. So, my sons 1981 DOHC, he's on active duty in Afghan and I promised him Id get it running sweet before he returns in November. Its bored out to 823cc because I had to...

Ive been having gas leaking out of my carbs for months. i did a full cleaning and carb rebuild. We decided to connect a hose to a gas tank and elevate it (removed from the bike) to see where its leaking from. Carb #1 is by far the worst and the others only begin to leak if you leave the gas on...

New member here! I recently acquired a 1979 cb750k on the local classifieds--not running, but otherwise in great condition with 12k miles on the odometer. I have no experience with older motorcycles, particularily carbs. The throttle was "stuck" and I discovered (after pulling the carbs out)...

Hi Gang, Jut got my vacuum gage and am getting ready to sync the carbs on my 93NH. The instructions say that I should have the choke full on while doing the sync. I have read a bunch of info on the net and watched a number of videos on carb syncing and I have never seen anyone have the choke...

Hi people! First time on the forum. After owning and working on a CM400T for the last years im now working on a 1982 CB750f project (EU). While in the process of doing general inspection and maintenance using the FSM I cleaned out the bottom end of the carbs using carb cleaner and put in some...

I just took off my carbs to fix my accelerator pump. Got it to work finally but as soon as I put everything back on the carb overflowed. I took off the carb inspected the float/float height everything seems fine and also replaced the needle. Again it overflowed like Niagara out #1 carb what am I...

Hi guys and gals. Great little forum you have here. I'm sure I will learn a lot. I have a 1980 CB750F in great condition and have a question about the choke. I don't believe mine is working properly as it is hard to start. How many of the carbs. does the choke effect? Is it a blade type choke...

Hey, Just picked up a 1981 cb750c. The #1 carb bidy has a broken jet tower. I found a cheap carb body for a 1981 cb900. Are the carb bodies the same just different jet sizes? Thanks in advance James

I have a 1980 CB750C. The air filter seems to fall down a few minutes after I put it in. Is there something that is supposed to be holding it up? I feel like something is missing on my airbox that holds the filter up.

Hi Everyone; Newbie here. Have a '78 CB750k that hasn't run really well since I got her. She is a cafe, running on pods and bogging down a lot. She was sitting for a while, so I'm thinking of pulling the carbs and giving them a good clean. From scouting around on here, I get the impression that...

Guys, I'm looking for vacuum fittings I can use to connect gauges to my bike to synchronize the carbs. I have a 1980 CB750C and I just rebuilt the carbs. I'd like to hook up some gauges but I don't know how to connect them to the ports in the head. The screw has a 5mm x .8 thread and I haven't...

So I disassembled carbs on 82 CB750 that idled only on choke and killed with throttle. I'm sure I did not do the process justice. They looked pretty clean. Removed all the jets ... they all looked clean. Stuffed the wire brushed through each including the pilot jets, at least the various...

Hey everyone. I have a 1980 CB750F Super Sport project. While rebuilding the carbs I noticed in carb #1 (left side) the accelerator pump nozzle was damaged by the previous owner. No gas nor cleaner will get through and it looks like somebody tried to remove it at one time, only to damage it...

Title basically says it all; I've been rebuilding my 1978 CB750A for the past three months, and I think it's finally in a shape to run. I rebuilt the carbs with the carb rebuild kits, and cleaned everything, and replaced all screws. I put it in, hopeful it would start, and as it was cranking...

Title basically says it all; I've been rebuilding my 1978 CB750A for the past three months, and I think it's finally in a shape to run. I rebuilt the carbs with the carb rebuild kits, and cleaned everything, and replaced all screws. I put it in, hopeful it would start, and as it was cranking...

Hey guys, I have an '82 Cb750 I'm building and the carbs need love. I was referred by Sean Grier here who says he no longer sells the hardware/software kits. Does anyone sell anything comparable? My fuel intake is also jiggling and I will probably need an o ring set for that as well or its gonna...

Hey everyone this is my first post, I just bought a 1980 750 that was sitting for a while. It started spitting fuel out of the bottom of carb #1 so I figure I probably should take apart and clean all of them, what is the best kit to buy for this bike? I read that randakk is the best bang for...

I was having a hanging rpm problem before and noticed that the intake boots were cracked. I replaced them. Carburetors have been cleaned. After replacing the intske boots, i assumed that the carbs weren't in sync. I tried synching them and just couldnt get it to work. I believe it was a vacuum...

hello cb750 friends -- how do I remove the stock air box on a '79 CB 750F SuperSport DOHC ? Do I have to remove the carburators first ? I'm in the process of installing a smaller custom-fabricated air box. I'd appreciate any guidance and advice.

Guys and Gals, I'm resurrecting a 1980 CB750C that's sat for a decade or so. Getting lot's of good info here, taking my time but it's not going to be a complete rebuild. One problem I'm having is with the fuel strainer, how do I get it out?. The petcock came of easily but the fuel strainer is...

My bike came with pods...not a fan...I cant find a decent used airbox so I wanna make one. Problem is I don't know what the inside looks like to replicate it. Any help with dimensions and pics of the inside would be awesome. Thanks

Am in need of a pic of the assembly for 74 cb750 so I can figure out what the p.o. removed, lost, whatever.... normal parts Fiche isn't clear enough for me. Basically need a pic of the carb holder with everything installed except the carbs....thanks.