dohc

Bike runs, idles steady. Carbs have been pulled and gone through twice. Manifolds on both sides replaced. No indication that the bike is running on only two cylinders and it actually sounds nice at idle. Figured since I got it running fairly well id do a carb sync. Cyl 1&2 look good - both...

Hello partners! I have a 1982 Honda Cb750Kz and I have a fault that cannot be located, I am leaking oil from the central axis of the transmission. I've changed the main seal and it's still the same, has anyone experienced something similar?

Ive been working on a 1980 Cb750f Super Sport. I recently purchased a new reg/rec and hit a road block wiring. The new reg recs wiring harness seems to have a jumper wire come from one of the field coils to the ground. As far as I'm aware the field coil doesn't have polarity. The factory...

I'm building this bike with my nephew (his college transportation). I do build a LOT of DOHC I line 4 Yamaha and Kawasaki PWC motors but got a little turned around on the motor while pulling the valves, Springs etc). When I went to go throw her all back together I MAY have either the exhaust...

Hello, can some friendly soul put up a video on how to put the airbox back on? Its seems impossible. I have them almost back on but there is a hose under the airbox making the hole thing to high. I just cant get it back on properly.

My uncle has a few cb750 cafe racers and we have been working on getting her at a steady idle and to rev appropriately it's running on choke and only for a limited time he has changed multiple carbs have tried different afr have good spark going to the plugs changed the cdis multiple times and...

Hello https://photos.app.goo.gl/Lczka93N3cYBWwwa6 *Edit. The clutch handle is held down in the clip so it's not engaged. I have a 1983 CB 750 F2 RCO4 I have a worrisome sound from my engine that appeared a couple of days ago (or at least it is more pronounced). I've used a screwdriver and...

1980 dohc came to me as non runner carbs in pieces got them all cleaned up and together. Bike starts but sync gauges are all 4 rapidly bouncing in wide arc. Make me think timing or valve adjustment. But I'm a harley guy haven't worked on a cb in more yrs than I care to remember. Any pointers in...

Hello, I have a 1982 cb 750f. I have a strange thing happening. I just bought this bike so i have no history of this. Under breaking and under hard acceleration i feel a twitch or a movement in the back end. Just for a split second and goes away. Feels almost as the back tire is slipping. It...

When disassembling the automatic fuel valve (16970-461-771) I found that the gaskets were weathered and broken. I've been scouring all the parts suppliers and had no luck on finding the gaskets only does anyone know where I can find just the gaskets?

I have a 1982 cb750k2 engine with Keihin VB52A inline carburettors. The standard size main jet is 102, mine has 98's installed. The previous owner has four DNA airpods fitted. Above 3500 rpm, when the main jet cuts in, the bike pops and bangs and stutters. I think the jetting is too lean...

What is the difference between the vb42a and the vb42d carburetor?

Hey Guys looking at for some insight on some issues that I am having with the bike I just bought. So I bought the bike running took it for a spin upon purchasing it runs great the idle does sit high at 2,000 RPM when warm. The bike does not idle when cold, the bike starts right up though but I...

'79 CB750K. Idles rough at cold start. Previously I had to hold the throttle open for about 1 minute or it will die. Once it warms up a bit I can release the throttle and adjust the choke. The other day it cut out after about 1/2 a mile. I thought it might be flooded, so I waited a couple of...

'79 CB750K. Engine turns over, but I have to hold the throttle open to keep it from dying. I warm it up like this for a minute or so, but as soon as I release the throttle it dies. This started the other day when I was riding and all of sudden it cut out after about 1/2 mile. I thought maybe it...

Bonjour, je suis en train de redémarrer une cb 750 c. Celle ci ne veut pas démarrer? En démontant les quatre bougies et en faisant tourner le démarreur. Je m’aperçoit qu’il n’y a qu’une seule étincelle lorsque j’appuie sur le bouton du démarreur. Si je le relâche et que je rappuie, il n’y a...

Hello, CB750 friends round the world! I often question my life choices. My recent purchase has made me question more than ever.... So, this bike came from the USA about a year ago, still needs to be UK registered, it was chopped (by a blind man, with 1 hand, who must have been drunk) in...

Any suggestions on how to evacuate all fluids from the gas tank? I have a 750L and I need to treat it for some rust in the tank and I can’t seem to get all the gas out of the tank to treat it. I was considering compressed air to try and force it out where the shutoff mounts???

1979 cb750k: I am trying to replace only one of four fuse box terminals that broke off when I was removing a fuse. Is it possible to only replace one set of terminals or do I have to now replace the entire fusebox? Thanks.

:confused: Jamsr CB750 New member Messages1Reaction score0Points1LocationMaryland 2 minutes ago 1979 750L I scoped the gas tank yesterday and there is a rust build up on the bottom corners where the metal is pinched together. Looks like it maybe could flake. Any ideas on what to do? I was...

PLEASE Help, I have a 91 cb750 nighthawk not getting any fuel, I replaced the petcock to find out that that is not my issue. It’s the smaller vacuum line that look like goes into the engine. I am not getting any suction to the Petcock is not pushing fuel thru to the carb. Please if anyone can...

Hey everyone, I’ve got a 1980 cb750c dohc. I recent rebuilt the top end of it, minus a few seals, but I made the mistake of trying to change the counter shaft seal once the motor was together, major mistake in my part. I totally messed it up, and to get the new one in you need to crack the case...

I have a 1981 Honda CB750 I’m not getting fire and I don’t have a service manual to get through the steps can someone help me out

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.

I have a 1981 Honda cb750k I can't get the starter to spin with the button relay is good battery is new starter is good I noticed the old relay I could pull the post out so I figured it was bad and I have a spare selling away than I put it on I heard it click a few times and then nothing any...

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...

Installed double b plate managed to get an original from Holland started the bike and noise still there, pulled clutch lever and noise disappeared. Ordered the clutch rubber kit from the guy called Wout from the Netherlands 65 euro. I posted installation instructions a while ago. I will give an...

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