carburetors

When I pull up on the choke, the butterflies close and it idles higher. Push the choke down, the butterflies open, and it idles lower. This makes no sense to me. As a side note, the bike already idles too high (4500-5000) so I know the carbs need tuned bad. I’m just confused as to how...

I finally got my 78 to start after changing the oil and cleaning the carbs (and properly hooking up the fuel line, I put it on the wrong inlet(?) on the carb). Only thing is it idles too high, like 4500-5000 RPM high. The rubber boots from the carbs to the engine are pretty cracked and I...

I just finished rebuilding 1973 carbs, before i putting carbs back on bike before starting the sync process i have a couple questiosn, should there be any play up top on slide adjustment, should i turn the nuts so play is just removed. also what should be a baseline slide gap (a assume all the...

I have rebuilt mt 1973 carbs, i have a questions regarding adjusting the slide , is the suppose to be any play up top, also how much gap should i have before putting carbs back on bike and start sync process, any help would be must appreciated

Hello everyone. I'm a new member but not new to Honda motorcycles. I'm trying to adjust my high speed idle on my 1978 bike. I followed the book: Pull the choke on; turn the adjustment screw until it touches the cam; open the choke and then turn the screw in two full turns. I understand that...

While I was taking apart my carbs, I had my work surface clean, then this piece appeared. I don't know what it's from, even if it's from the carbs, but if it is, is anybody familiar with what this is and where it goes? Thank you.

Newbie question: I'm trying to troubleshoot a racing engine on my barn find 1980 CB750C with 21K. Carbs completely redone including full tear-down, ultrasonic, fuel rod o-rings and throttle shaft seals replaced, plus new intake boots and plugs. No vacuum leaks. Starts instantly and runs fine...

Where do I get a new one that does not leek when turned off 73 cb750 Any help would be great Live n ny

So, although the bike runs fine, I’d like to check the sync is done proper. The compression is checked good, the electronic ignition is spot on and the top end is new and correctly done. So I did a refresh on the carbs because the #2 slow jet was not completely clear. all carbs clear and floats...

2002 shadow 750.. Acceleration good up to 1/2 throttle, Accelerates slower anywhere above 1/2 throttle to full throttle. Feels lean to me?

I’ve cleaned and lubed the lines, carbs have been cleaned, throttle has been and lined. When the engine is off, the throttle snaps back as it should. But when the engine is running, throttle up .keeps it up. I can throttle down by pressing the carbs. Any help appreciated.

Check out this guys"SERVICES thecarburetorguy" https://www.thecarburetorguy.com/restoration-services bought a set of vb52 carbs for my 81 cb750 dohc, fitted them and the bikes problems disappeared if you are having problems with carb set up and cleaning check him out guys name is Shannon he is...

Hello everyone, just thought I would come by in hopes to implore the wisdom of some CB wizards. I am replacing the fuel lines on my CB750 and I’m lost.. the first issue is my fuel line immediately hits my frame after the tank so I need a 45Degree bend. The second issue is I have no idea what...

1977 CB750. Once I get the machine warmed up and idling fine, when I give her some throttle she makes a hissing sound and dies. I’m assuming she is too lean? Not sure what to adjust. Suggestions.

Hello and thanks for the help can anybody explain what the carb numbers mean this is off a 1982 honda nighthawk 750. VB 42A UTL what each digit or number means . and can a replace my honda VB 42A UTL with and VBA ### i guess ive heard any VBA -??? will work is that correct ? thanks John

Hi all does anyone know what the vacuum reading on #2 carb should be on a cb750 Dohc 1981 I'm getting 8 cmhg. Kind regards Rampton

Has anyone tried one of those ebay gas tanks? Like this one...

i bought a 1978 750k with rebuilt carbs ,the person i got it from mention one of the carbs might have a leak in one float bowl overflow tube,i started the bike and was hard to start but would run but couldnt idle leaking from overfow,, with bike off when you turn the petcock on fuel comes out...

Hi, does anyone know what the correct carburettors for a 1981 Dohc cb750k are. 🇬🇧🇭🇲

So due to me running across a dual cam bike with no stock airbox and pod filters being my only immediate option I was forced to make them work. Contrary to popular belief not only do they work but they work very well if you take a little time and put a little logic into your thinking.

Can someone tell me what this is and its function, carries the label THOP in the picture? Mounted to carb rack. Tube running from some sort of solenoid or check valve. Thanks in advance!

I know the carbs need to be sync'd better but the issue im having you can see in the video. Looks like this carb opens via vacuum leak? any suggestions?

hello friends — need shorter throttle cables for my newly installed clip-on bars bike is a ‘79 CB750F SS ( DOHC ) — any recommendation on sources ? — are CB750 SOHC and CB750F DOHC cables compatible ? ( I believe an option is to re-route my current stock cables by making wider bends, but I...

Hello all, glad to be a part of this group. I do apologize if this has been covered before. I picked up this beauty with only 3062 original miles. Obviously been sitting. Issue I am inquiring about is I am in the tank cleaning stage. This is a single tube petcock screw on design. When I removed...

Hey all, Been searching for a while and I simply can't find any documentation or labeling about something I'm looking to identify on my fuel tank and was hoping you all could help me out. Long story short, I recently bought a '75 CB750F which has a '78 CB750K fuel tank mated to it. Everything...

Hello, I bought a 1981 cb750c in November. Complete bike, all 4 carbs were together, in a box. Took float bowls off, cleaned everything, replaced a couple jets, all 4 main gaskets and float bowl drain screw o-rings all from Chinese carb rebuild kits that the previous owner had for the bike...

If anyone can guide me to the best kit, tried and true would be appreciated

I have a 1973 CB750. I have recently ran into a problem in how it acts like it is not getting enough fuel. I can start riding and it runs fine. Starts right up and purrs for awhile. Then it starts acting like it is not getting enough fuel. Sometimes it will run like that for a short time then go...

I have a 1973 CB and I just got some carb work done and when I got it back the left carb is leaking out of the pod. Does this mean I have a flow problem or vacuum problem. I’m running 110-40 jets. Please help! Thanks!

Looking for an 80s Honda supersport fuel tank, thanks.