carburetors

The carbs on this barn find are in pretty bad shape. The screws that hold down the float bowls are all stripped out and the main jet port on the carb is half broken off. Like to just get a new set of carbs or newer and better shape then whats on it. Found a few on eBay but they don't look to be...

Hello, I'm new to the site and I have a 1973 cb750four. I have notice that the slide on my no.1 carb doesn't open with the other 3 carbs, it is a bit slower to open. Is this normal or is it out of sync. Just wanted to get some input from somebody that may know more about it. Thanks

I'm rebuilding carbs and keen to keep it all stock. They are Keihin VB42, I've bought a rebuild kit which came with different jets [some numbering on top, others with numbers on the side] Originally the carbs had 68 and 100. Rebuild kit came with 102 and 89. Can anyone assist with the standard...

HI new to the site have a question I can't find the answer to I got my first Honda a 1981 cb750 I have been building. after getting it alltogether I tried to start it and it would start back fire out of cylinder 3 and die. I have good spark so I assumed the carbs were out of sync but after...

Hello everybody, Please assist a newbie from Copenhagen, Denmark. I'm the happy new owner of a partly unrestored CB750 Four K2 which has been off the road for at least 10 years. 27.000 km according to the gauge. Most soft/rubber parts, including carburetor manifolds, O-rings, fuel hoses...

I've rebuilt my carbs, replaced the needle valves, ensured that everything is clean. At the higher end of revving, when the rpm's get over 6k, it acts fuel starved. the bike starts right up, and gets gas on both the fuel and reserve settings of the petcock, is it possible that the vacuum is not...

So I bought my first motorcycle almost 2 years ago. Needed a bit of work as the previous owner had it torn apart. After finding that the sell did not come with matching carburetors for the engine I hunted down what I believe is the correct set. They need rebuilt and while I'm pretty comfortable...

Hey All! I'm new to this site, this being my first post. A while back I bought what was to be a completely restored 1979 CB750F. For the most part that seems to be the case, with one exception. I found after riding the bike a couple hundred miles that the fuel tank was terribly rusty. I took...

Hello fellas, **OP was in the wrong forum... I am trying to source some replacement boots from the block to the carbs, also from carbs to stock air box (for now...PODS look so sweet) my bike is an 1982 CB750SC - DOHC What year, make and models can I source rubbers from? I have found...

I'm searching for a regulator for my 77 cb750k. They all usually start with TL1Z-38 12v and the one I currently have on the bike ends in 607. I found different ones but they all end in different numbers; some of them it says that they are compatible with my model but how can I be sure? Thank you

'78 750A. I received my carb kits today and I noticed a difference between the new and the one I removed. you can see by the pic there is a difference. The service manual shows a needle similar to the new one. My question is about the old needle. Is that what was installed at the factory?

At first o thought the cable was going bad until I went to replace it. Now I've realized that the choke barely rotated, with force. What could be the issue. I've soaked with pb blaster a few times.

Can someone tell me whether the 'oval' fitting petcock on the K3 has to be bolted from inside the gas tank ? It seems like a difficult job. The old one seems to have nuts or square headed bolts from the inside which I have not dared trying to remove yet and the new one did not come with any...

Hello fellow 750 lovers! As a background story, I purchased a 1980 cb750k back in march and ever since it's had some problems with idling. It'll start and idle for a minute and slowly die off. If i give it throttle it'll stay alive as long as i keep throttle on. Recently though, it's gotten...

Rebuilding a set of Keihin 7A carbs and noticed #1 carb - i.e. carb with choke lever - is missing one of those little brass vent disks. Not sure if I did it when blowing out passages with my air compressor or if it was missing all along. It's not the disk in the passage that goes to the air...

1999 CB750 here. Bike has been sitting for 6 months, I stopped riding because the starter motor wouldn't fire, I just heard a click coming from the starter solenoid so I replaced that and still, just a click, so I had to back burner my bike due to school. Got back into it, I took off the cover...

Reached a dead end trying to remove rust (bad) and scummy deposits from the interior of my fuel tank. Evaporust only removed a small amount of the rust and deposits. Stuff is expensive and two gallons barely touched the mess. Looking to purchase a replacement (including petcock) with no or...

Hey guys, I know there may be know real answer but any ideas where I should set my needle, I have cycle x 850 kit, running stock air box. This is where my needle was set when I took my carbs apart.

I am just wondering if this less then perfect choke adjustment is ok, when I close the choke lever all carbs except number 3 there as you can see does not close ALL the way. I adjusted both sides with the screw linkages and this was the best position I could get. Should be ok I would think?

Hi, I have my carbs taken apart and ready for cleaning. Can I use the stuff they sell at Auto Zone or is there a special bike carb cleaner? Thanks!

Hello. The other day I changed my oil and took a quick spin to run the engine and work the new oil in. When I got back after only about ten minutes, and was backing into my driveway I looked down and saw a significant size puddle below the bike. It wasn't an oil leak, as I'd feared. It was...

Ok I took my 82 out for a ride after cleaning carbs. It starts great runs and idols good carbs are synchronized but the acceleration is not there. There's no snap to the bike.

I own a 1980 CB750K w/ Vetter with 34,000 miles that I have been working on for far longer than I care to admit. (I also own an identical motorcycle with around 23.000 miles.) Without getting into too much detail, my problem is this: I cannot get this thing to idle. I have rebuilt/replaced the...

Got new battery for the bike and tried to see if it would start crank but no go sprayed started fluid in air box started right up and died. Removed gas line from tank to see if fuel was coming out and nothing. Drain tank and removed petcock and I got cracked tube and seems to be clogged. Tried...

I have cleaned the carbs on my 82 750 Classic and now I am putting them back together. I have been using one of the guide that was posted on this forum and for the most part it has been helpful. I have hit a road block. on the 1 and 2 Carb halve, I am installing the choke shaft and trying to...

Followed all the steps in my Clymers manual plus review of other sources. Need to remove from bike to clean and rebuild. Problem is that after following all the steps, all bolts removed, battery box moved etc., cannot get carb unit to pull free from intake ducts; it's like they're cemented in...

Need to replace my float needle valves and I understand they should be replaced as a set (needle and valve) but which needle is better regular brass or with rubber tip?

so i picked up a 1980 DOHC cb750c that will eventually be turned into a cafe racer. so far ive looked over it a little just to see what i will need to try to get it fired up. well the choke is jammed so im guessing the carbs are as well, so ill probably need to tear them out and rebuild them...

Hello, I'm a new member/owner, and I love this bike. Its super clean and only has 45k on a single owner. However my #4 cyl isn't getting fuel, but the carb is. I have a sinking feeling I need to pull the carbs for cleaning, but I would like some advice first. Thanks in advance -rich

Hey everyone, I have just picked up a 78 cb750a and it missing some things, what I was wondering is where does the hose go that is in front of the fuel line on the second carb, someone has left it plugged into the carb but has cap it off, I can not see where it goes, can anyone clue me in what...