sohc

I bought a 74 CB750 approx 1 year ago. Bike didn’t run when I bought it but would turn over using kick starter. Previous owner said engine ran before bike was parked 10 years ago. Bike has compression 120-150psi, spark, fuel and timing is correct. Good starter and new battery. Damn thing should...

Hi, I have a cb750 -71. And I noticed the battery wont charge. I measured the rectifier and got 0.2V DC. So I continued with measuring the volt from the 3 yellow wires from the generator and got 0.2V AC so i think the rectifier is OK but something is wrong with the generator. After some...

So I'm currently working on a top end rebuild for a 1972 CB750. When I got the bike, the engine turned over easily, but as it hadn't been run in a while and I had no idea on the internal condition of the engine, I decided to do a top end rebuild just to be safe. I tore it down with minimal...

Have 78 CB750A with no spark. I tested the voltage going to the coil and only getting 8 or so volts. Should I be getting 12 volts?

Hello all. I'm at wits end and hope someone can help me. 75 SOHC motor. Just did a stock rebuild. Head professionally rebuilt. Everything lines up as per the manual. #1 cylinder at TDC, notch on the cam pointing up, etc. I adjusted the valves on cylinder #1 no problem. According to the shop...

Spent most of the late winter an early spring putting my F back together. I finally got a chance to ride and found that after about 20 min. running time 2 and 3 would cut out, after a few min. running on 1 and 4 it would kick back in and run good for quite a while sometimes and other times it...

And it didn't fit. The listing said it was compatible but the holes aren't matching up. My fault for not having done the homework but now I'm trying to figure out if I A) Waste time trying to find a decent used 69-72 clamp B) But a NOS one on ebay for 250+ or C) But a slightly beat up front end...

Hi y'all, My '74 CB750k4 is in great condition, all original, 10k miles and runs fine. Headers are good, but the mufflers are badly rusted out. For me, this bike is a nice looking classic rider, not a concours restoration project. I'm looking for some input to help me decide what replacement...

I was given a CB 750. Needs some work.. I know I need a carburetor and airbox(or alternative). . This is my first motorcycle and I'm really excited about working on it and getting it road ready. . any advice on where to get the parts I need would be great. (Pretty sure that's all I need to get...

Hey guys. Super, super newbie here. Have had 2 motorcycles which were shop maintained. Just bought a new 72 CB750 I’d like to fix up. First things is need to complete my engine and can’t fihure out the difference between pods and air filters. Everyone says pods are bad but I don’t even know...

Hi there and thanks for letting me join the forum. I have just purchased a CB750 K5 which was imported into the UK some years ago and given a 1978 registration plate by our Vehicle Licensing authority. I believe that the bike was actually manufactured in 1974 and sold in the US in 1975. Does...

Cb 750 1973 I’m having trouble with the second gear on my bike when I shift into second and go hard on the gas it feels like it keeps on coming in and out of gear ,but this is only if I’m going hard on the gas and it only does it on second gear I’ve changed the clutch already but it made no...

1974 cb750 bought last summer fully disassembled. Engine was complete but valve cover and side covers were removed. I now have the bike reassembled, new battery. Compression checks out on all cylinders 120 psi. Engine turns over very slow and won’t start. Starter Solonoid is new and properly...

Hey Guys! I'm new to the forum and would like some advice from some of you who are much smarter than I am. I'm currently in the middle of doing a full engine rebuild ('75 SS). Most of the websites seem to have parts for the K engines but seem to have hardly anything for the F engines. I...

So kind of a complicated situation I've gotten myself into... but after doing some modifying of the frame geometry, I'm trying to calculate whether the Cognito Moto oil can will work on my bike... what I need is the dimensions between the mounting studs. So, distances between the four holes...

Hey, brand new to the cb crew I want to covert into a cafe racer type and want to swap out he fork and maybe lift the suspension and play around with it. I don't know where to start any suggestions ?

Does anybody by chance know what the standard length and free play of the push and pull cables on a 77?

Hey Everyone, I just rebuilt the carbs on my 1978 K8. I had an issue with a vacuum leak before so while changing the boots I used the opportunity to buy rebuild kits for the carburetors. -replaced all the jets apart from the slow jet (as a new one wasn't included in the kit), Gaskets...

Hey guys I recently got a new battery (lithium) for my bike. I cranked it took it for a short ride got back home then heard hissing coming from the battery with alot of smoke. The battery was a name brand one that was recommended from the battery store I went to. I was wondering how to go about...

Good morning, my 750 motor with a socket on the crank moves about 6 inches oneway then sounds like it hits the block and stops. then I can take it back the other way and about 6 inches it sounds like it hit the block again and stops again. what could cause that?

Hi all, Just finished a 74K project, and have discovered that I hate the original prickly Honda hand grips. Does anyone have a recommendation for comfortable and functional grips that they have used? I'm thinking of maybe going with the British style grips like those on my '78 Triumph...

Just a quick intro. New to the CB750 but not new to motor cycles. I mostly work on them now rather than ride. My age is showing. This year I have rescued 2 old relics and turned them into useful bikes. A 50cc Chinese monkey bike for my younger grand son and a CB400T II for my older grandson...

have a 78 model and would love to put a drum brake front on it,think late model 450's shared the same disc as the 750's,wonder if the drum front end would fit,anybody fitted a drum to their bike

Hi I'm Tommy. I live in the Lehigh Valley in PA. I recently acquired a 1978 CB750F with 30K miles on the engine. The bike hasn't been registered since 1984 and the engine turns over with the kick start without a problem. My friend was saying "just do a compression test and if it's good then go...

Hey everyone, I'm doing a full rebuild on my PD 42 carbs. Ive spent the last few hours scrolling the internet trying to figure out the type of tubing and size between the carb bodies to no avail. Im guessing the yellowed tube is a vacuum tube and the black is fuel line. Does anyone have a...

Hi new guy here Bought a 1976 cb750. Carbs were clogged. Latest issue. It seems like it is overcharging. 15.7 volts. What do I need to replace or check first?

Hello, I have a 1974 750-4 with the wiring all screwed up. My problem today is I got the motor to fired up but no spark at #1 or #4 cyl. I changed to a different coil pack and the same problem 1 and 4 no spark. HELP

gday all ,have a 78 k7 that has had the wiring butchered,wondering how can i get rid of all the wiring and leave ignition only to see if it will run,will grab a complete harness later,have pulled all lights and other gear off

Hey Everyone, I have a 1978 750K I've been having trouble getting a decent idle. I can get it down to around 1600 RPM, Any lower and I will get that odd pop hiss sound and the bike will die But, when my idle is working at that low the bike will bog down and stall if I give it too much...

Hey Everyone, Just started a CB750 project and this is my first day on the forum. I have a 1978 K8 I plan on rebuilding the carbs, But after a bit of research I've noticed that finding parts for the 77-78 carbs is much harder/more expensive compared to the K0-K6 Is it feasible to put the...