dohc

Hey everyone this is my first post, I just bought a 1980 750 that was sitting for a while. It started spitting fuel out of the bottom of carb #1 so I figure I probably should take apart and clean all of them, what is the best kit to buy for this bike? I read that randakk is the best bang for...

Hi, all. I'm coming to you as an ignorant noob, hat in hand, with my first motorcycle and a ton of capacity for learning (aka, I don't know anything). I bought my 750 from an old coworker who told me it was a 1989. I'm not mad about that (it's very cheap and it runs) but it did lead to a few...

I recently bought a 79 cb750 DOHC, guy converted it in to a cafe racer and put on these shitty after market tail lights and indicators. He blamed the oil stop lamp being on because they were cheap LED lights, uppon inspection of the wiring there are some relatively unreliable connections and the...

I was having a hanging rpm problem before and noticed that the intake boots were cracked. I replaced them. Carburetors have been cleaned. After replacing the intske boots, i assumed that the carbs weren't in sync. I tried synching them and just couldnt get it to work. I believe it was a vacuum...

hello cb750 friends -- how do I remove the stock air box on a '79 CB 750F SuperSport DOHC ? Do I have to remove the carburators first ? I'm in the process of installing a smaller custom-fabricated air box. I'd appreciate any guidance and advice.

Guys and Gals, I'm resurrecting a 1980 CB750C that's sat for a decade or so. Getting lot's of good info here, taking my time but it's not going to be a complete rebuild. One problem I'm having is with the fuel strainer, how do I get it out?. The petcock came of easily but the fuel strainer is...

Howdy ya'll, I am now a proud owner of a 1981 CB750F Super Sport. This is my first bike. Literally bought it yesterday. Riding it back from the guy I purchased from yesterday and the battery died on the freeway. I was able to make it home and I left the battery on the tender overnight. The...

I am having trouble setting the cam chain markings to set timing can anyone help

Hello, I bought a 1982 750 Super Sport last week. The exhaust has big holes in it on the underside. As part of the deal, I got a new, still in the plastic bags, MAC 1-1609 exhaust set. When I look at the MAC Performance website, I see that the recommended exhaust set is 1-2609. The 1-1609 is...

Hello everyone, I am new here, so first up something about my bike. I bought a CB 750 KZ '79 DOHC with 80.000 KM on it last winter. It's my first 4-Stroke motorcycle, but I was repairing/restoring some cars before that and wouldn't call myself unhandy with vehicles in general. The bike was...

I have a 1972 cb750 that did not come with the correct carbs and I'm unable to find sohc carb in my area for a decent price. however, there are carbs for a 1981 cb750 of a price am willing to pay. does anyone know where I could buy working carbs for a good price or if I could use the newer carbs...

Hi everybody There is any way to know the wheel offset side to side of the rim in relation to the hub. I am assembling the wheels without previous references because they where in parts. Best Regards

I'm looking to repair a stripped out cam cover bolt on an '82 CB750. Can someone tell me what helicoil I need to do the job, is it an M6 x 1?

Hi guys, Recently I've bought a CB750C from 1983 but I'm a bit disappointed that I only get him to max 110-120km/h in 5th gear at 9000rpm. As I read here on the forum and on the internet that he should go a lot faster, the motorbike has been modified and rebuilt by an unknown person. Can...

Rebuilding 1981 CB750K. Rebuilt the carbs and reinstalled on the bike. Now I realize somewhere in the project I broke one of the arms off the throttle arm that holds the pull cable Now it will not secure. Have not found the broken arm piece. Not a replaceable part. Any suggestions are welcome!

i i have a 1981 cb750k with low mileage that has been stood for a lot of years i have cleaned the carbs out and replaced it seems to be running weak the plugs are nearly white do they run very lean or am i missing out on something could it be the fuel accelerator pump diaphram be anything or...

I'm interested in getting a honda cb750f supersport, and I found one listing on craigslist. Under the description, he mentioned that the bike has problems at higher RPMs so I messaged the seller and asked him about the "higher RPM issues" to which he replied with a video showing some engine...

Working on non-running 82 CB750SC/Nighthawk. Replaced Coils and now firing on 4 instead of 1 cylinder. Still kills with throttle. Guessing Pilots. In meantime I wanted to check valve lash as I see many suggesting this is critical. spec is .08mm +.05 so 8 to 13, both intake and exhaust. All...

hi all, is there a strong argument for either rebuilding or replacing the OEM brake master cylinder on my cb750 DOHC? Thanks.

I’ll post some pics later of my 1981 cb750f cafe build when I get the tires on. I’m pretty set on the 4.50-18 rear and 4.00-19 front Coker tires, however, here in Utah almost every road is grooved and the tread of the Coker tires makes my bike sway when going over 30mph. My initial tire was the...

Howdy All, I've got an '80K that runs great but is in rough shape cosmetically. I can pick up a '79 that has pretty parts. I'm wondering if the seat, tank and covers are a straight bolt-on application. Many Thanks.

I'm going to start riding again! Gave up my last bike after my son was born - 26 yrs later he brings this 79 CB750L home so I can have something to play with! (Mostly because he want's me to ride with him!) Been sitting a lot of it's life, only 4K miles on the odo. I have the Carbs off and am...

This is my first go at an engine rebuild and Im torn on if I should replace both rod and main bearings. Engine had 36k miles with low compression on all cylinders. I believe these are the original bearings as they still have their green and brown markings on them and I haven't seen too much to...

Hello everyone! New here. I Just moved up to a 79 cb750k (technically the 10th anniversary edition) from My Last bike a 76 cb550 and I’m stripping it down, removing the airbox, and has 4to1 exhaust. I’m about to rebuild the carbs and plan to jet appropriately for pods and the exhaust. However...

Hi all, if you've seen my other posts you know I started with inconsistent compression across all 4 cylinders. AMC kindly advised to adjust my clearances but digging a little deeper I found a leak in my cylinder 1 exhaust valves. I did a leak down test which confirmed that suspicion. So in...

Hi CB750 Fam! Been reading posts on the forum for quite some time, slowly learning and getting to know these beauties. Not until recently where I jumped on a purchase did I find the need to post this. So here goes my story... Found this 1980 CB750 up for sale in my area and snatched it up...

Sorry, posted in the wrong forum, moved it to the 1981 forum. THank you.

This doesn’t seem right. Can’t find the exact answer I’m looking for.

Hey all This is my first post, so I'm hoping i go by the rules on that Ill start by saying that I'm hoping you all will understand my English, as it is not my first language. So the question: I have a 1979 cb750. I took apart the engine to replace the head gasket. I haven't measured...

Hey all, Just bought a 1980 CB750, since I have some spare time on my hands (Thanks Covid...). It came in a variety of parts, and its hard to tell how long it hasnt been running. I got it fully built yesterday and ...it runs! Which is pretty good, not knowing anything about the history on it...