engine

I am looking for the lower half of the crankcase. Upper half is usable but the lower half has a chunk out of it where it appears the chain has maybe broke and doubled up in front of the sprocket.. I purchased this bike that has been sitting for probably 40 to 45 years in a barn. I have found...

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?

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 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...

New here. Recently purchased a '75 CB 750 that needs some minor restoration. Looking for OEM style exhaust. Can I make the pipes from an "82 fit?

I've built by first CB750 chop. Amen savior, P&P Girder, 836 kit. My question concerns the nipple on the back of the motor... My aftermarket oil tank has the two lines that connect to the engine, no prob there. A third, smaller diameter spigot protrudes from the bottom of the tank. I've read a...

Does anyone have a decent set for sale or know where I could find them?

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...

Hi there, I'm somewhat new here, have lurked for a while but rarely post as most things have been covered, I cannot however find this particular problem in the search. I've owned this 76 cb750f for 2 years now. it ran ok...when i bought but wasn't charging. fixed that with new/proper...

I am helping a friend with his SOHC CB 750. The bike is complete and when he went for a test ride, he went through the gears and when 5th gear was selected, it got stuck in 5th gear. Now the clutch works fine and he can push the bike with the clutch lever in. I suspect the chain tension or the...

Does anyone know where I can get the Installation Instructions for putting a Drouin Supercharger on a Honda Cb750 K1? A pdf would be greatly appreciated. Thanks.

Does anyone know where I can get the Installation Instructions for putting a Drouin Supercharger on a Honda Cb750 K1? A pdf would be greatly appreciated. Thanks.

My CB750K exhaust system has just been sold.

Hallo CB-Fans, ich habe seit ca. 6 Jahren einen AME Super-Chopper mit einem Honda CB Motor, F1, BJ. 1978. Seit kurzer Zeit habe ich das Problem, daß der Motor meiner F1 im heißen Betrieb und wenn ich einen Kreisverkehr fahre rasselt. Laut einem Vorbesitzer ist der Motor rund 130.000 KM und...

Take a look at the attached photos. Do you think this is repairable?

I’m new to motorcycles and recently picked up a 1974 CB750 SOHC. Got it running and it sounded great. I accidentally left the petcock on overnight and now after it warms up it has a chirping coming from the engine and eventually stalls and dies as it heats up. Definitely metal on metal. I’ve...

I have a 1978 CB 750A hondamatic i’m looking for a four into one exhaust but when I look online they have them for other models and not the one for Honda Matic what other models will fit???

I'm trying to find a Split joining link for DID O Ring chain for my CB750 K0 all I can find are full chains? Thanks

Will the exhaust from a SOHC Honda cb750c fit a DOHC Honda cb750c. I can't find a 4 into 2 exhaust system anywhere and my original pipes have developed rusted holes.

I have a HM300 exhaust pipe for an early model, 1970/71 Honda CB750, lower right number 3. Brand new OEM never installed. Has been sitting in bubble wrap for many years. Unfortunately it has suffered a small ding and minor marks all in same area as shown. Does anyone have with insight on fair...

Does anyone know the torque on 750 honda spark plugs? Cheers

Can the head on 750K0 be removed while still in frame? Cheers

I have a 1981 CB750k that has some hesitation and sputtering under high load, and I’m also continuously getting a black plug on cylinder #2 (even after new plugs). It seems to start up and idle fine, and even runs pretty good for the most part. Cylinder 2 is getting hot right away on startup...

Hello all I’m currently rebuilding the top and bottom end on a 79k dohc. The bolts are quite bad for the casings and would like to know if there is any kits that I can buy that are good. Found couple on eBay but not sure about them. Any help is appreciated

Does anyone have engine temps, or know what max temp is acceptable for these engines? I'm looking for surface temps (valve cover, cylinder fins, exhaust/header connection and/or oil temps) after a decent ride or even just warmed up in the garage. I suspect my '81 CB750 is running a little too...

1981 CB750 DOHC. The engine was rebuilt by someone else. I am going through and setting up timing. Noticed that the 1,4 Cylinders are at the top while the timing marker is on the 2,3 cylinder. So the TDC is flipped TDC for 1,4 is set at timing mark 2,3. Cylinders 2 and 3 are at TDC when the...

Is it possible to just remove that bolt and put a new seal on it

Hey all, I'm new to the forum. I'm in the process of tearing down a K1 motor and when I could get the case to come apart, I realized the case near the chain sprocket appears almost like it has been melted. Has anyone seen anything like this before? The motor had a broken chain tensioner which is...

I'm in the Midwest and could maybe pick it up if the price is right. (Maybe other years could work).