frame

Bike has an aftermarket master cylinder, however, I have the original that needs to be cleaned and rebuilt. Having a problem removing the plastic reservoir. Appears that all the fasteners are removed, but the reservoir is stuck. Perhaps the large O-ring has bonded to the metal body. hesitate...

Hi guys, I'm in the process of replacing seals on one of my front forks, I've measured the length of the fork spring, which is coming in at 525mm, according to my Haynes manual service limit on these is 551mm?? Seems like a massive amount of wear?? Can anyone confirm the service limit on...

Rebuilding the MC as it was original. Ordered a rebuild kit. Then a second one because I thought I made a mistake. Both came in with a smaller diameter kit than what is on the bike. Plunger was about 1MM smaller. Could this be because the MC came from an older model and used anyway at the...

I am working on my project bike 1982 cb750sc nighthawk. I replaced the front wheel bearings myself but when they were pressed in place I could not turn the inner race by hand. I knocked one bearing back out and it turns easily. When the inner race of both bearings press against the spacer...

1978 CB750F, has no center stand. Would a center stand from other CB750 models fit the 78 F model, or is that stand model specific? Thank You! Dave

I removed the forks on my 1982 CB750SC nighthawk and had them rebuilt. There are two rubber bushings on each fork and for the life of me, I can't remember how they were when I took them off. One goes on top and bottom of the blinker assembly that the fork slides through I'm sure. Any help is...

Looking for a mounting bracket or source for a Windjammer III for a 1979 CB750K

Does anybody know the fork oil capacity for a 1983 Nighthawk 750? Also, will it matter if I remove the original caps and replace them with some that won't allow me to add air? The hose connecting the two forks would stay in place.

I just wanna ride!!! Still with front brake issues... I rebuilt the master cylinder and it appears to function with check valve working. I also rebuilt the brakes including new piston seals. The brake lines were not replaced but were cleaned out with wire and compressed air passes easily...

I’ve broken my second speedometer on 1980 CB750c. It’s an aftermarket LED style one from Vintagecb750. I bought the bike with it already installed and when I popped the first one I got a replacement and that one popped after about 100 miles. Basically what is happening is that the speedo still...

Replacing the front fork seals and can't figure out what side faces down into the fork. Both sides of the seal have compression springs and have flat surfaces. The OD also appears the same on both sides. One side does appear to have 2 ridges/lips internally and also has a larger external gap...

Rehabbing my newly acquired 1973 CB 750. Ordered a new front brake master cylinder rebuild kit for a 73 and the piston is too narrow. I believe the master cylinder on the bike is from a Goldwing based on the shape of the front of the brake lever? (the front brake was converted to 2 discs at some...

Hey everyone, I recently purchased a 1980 CB750 cafe racer project and I want to put it on a center stand. While it was at the shop for getting the carbs tuned, I ordered a complete center stand assembly for him to install. When I checked in, he has some pretty interesting news. The bottom of...

I'm getting closer to to road ready on a '82 CB750 Custom. The previous owner had let the bike sit, but his brother installed a new plastic brake reservoir on the brake lever and gave me all new front brake lines (all the way down to the calipers). Installed those, but their full of air at the...

Hi all, I am a Filipina so I hope using my language is manageable by you. Inquiry lang po sana. Im from baguio snabe ko lang location kasi dito madaming taas, baba na daan madami din curves at blind curves. Anu po ba ang magandang Motor na gamitin for initial budget na 50-60K automatic...

Replaced the brake shoes on my rear drum as part of rear wheel service, (all new bearings to) all went together fine. This is on a bike I have been restoring for the last 2 months. Finally took it out for a short ride, motor still needs some tuning but all in all it ran pretty good. Had to...

So I'm looking to do a few upgrades to the brakes on my F2C. The current rotors have seen better days (as you would expect for an 30+ year old chunk of metal) and rather than just opting for some OEM replacements that will also be used, i was wondering - does anyone have any...

Can anyone tell me what the difference is between the 79 cb750k and cb750f swingarm?

Hey so I have a 1981 cb750k and have a friend you has a 2012 thruxton front end he’s willing to give me. Has anyone attempted to do a swap. I’d like to do this because I like the 17” front wheel and more modern from brake. Thanks in advance for any guidance.

Hello again, My front was a bit blocked up with crud but managed to get it free with compressed air up the line and working enough to allow me to remove all the pistons from the calipers. Now that I’ve fully dismantled the master cylinder, I could easily clean it up in a sand blaster then buy a...

Hi all, I’ve commenced stripping down my 82 model and the current task is rebuilding the brakes. Quick question in regards to replacing the front lines, is there any pros or cons in sticking with the oem 3 line configuration utilising the splitter or going with a 2 line (race set up) where both...

I am ready reassemble my Forks on my 81 Honda CB 750 ,. Can anyone show me where the metal seal stopper goes,.? Thks Keith,.,

Hey Guys, I am a newbie to the CB750.com forum but an avid motorcycle enthusiast. Back in 2011, I stumbled across a C/L ad for a Honda CB750 collection of parts in Colorado Springs. The wife was selling her ex's collection of Honda CB750 OHC parts. The story goes he was a Honda Service Manager...

Anybody have any good videos on how to spoke these wheels,.,?

Hi, Anybody know a source for the rubber bushings inside the headlight / fork ears? Rehabbing a barn find K1/K2. It came to me as a '71 frame & motor with a '72 front end. It sat for quite some time before I got it and most all the rubber bits on it need replacing. There are used bushings...

New member signing on, just purchased an 81 CB750F with 12k original miles here in WA state. Runs ok but has been sitting for quite a while. Actually rode it today up the street and of course carburetion is an issue. Initially it looks like a float is stuck in #1 or #4(not sure how the carbs...

As I am starting to reassemble my 750. I am confused as to what spring is used for the Center Stand,.,? I s it the larger Spring with the plastic cover over it,.,? Or the longer skinnier spring ,.,? Thks Keith,.,

Hey All! Happy to join the ranks of happy CB750 owners. There are a few questions I have regarding my newly acquired cb750. Hopefully you will be able to see the pictures attached. First: Is that front rotor too rusted? it isn't pitted at all, pretty smooth.. the rust seems to rub off...

When I took apart my forks on my 81 Honda CB 750 K. I noticed a ring thin in design. And had some weird shapes to it.,,Do I need to replace these when reinstalling Fork assm. ? Thks Keith,.,

Hi all. First post here and after some information from anyone who has used the comstar conversion rings for a CB750 DOHC. Looking at using a kit for the rear to match a Cognito Moto front hub, however I would like to run a wider style tyre and unsure what the biggest I could potentially run...