Honda-SOHC

Hello again everybody,

I am in need of some more help if possible. My rear brakes are binding and the disc is heating up and the calipers are stuck solid.
They do ease off if left for some time then it all happens again only whilst riding though.
I have so far removed caliper checked seals and sliders all fine I think so have moved on to master cylinder.
If I push one piston in the other pops out and I can't push them both in at the same time. This leads me to think that it is the master cylinder not letting the pressure back up.
I installed new seals etc in the master cylinder when rebuilding and it seems to operate fine. There does appear to be one hole blocked but I am unsure where, if anywhere it should come out?
I have attached a picture of it hoping someone can help?
Thanks,
Magnus. [ Guests cannot view attachments ]

Hello everybody,

By way of introduction I live in Orkney. I have returned to bikes after a lengthy absence and was looking for a project so I had my first proper experience of one last year when I got an XT350 as a box of bits with only around 70% there. I enjoyed the experience very much and did almost everything myself. When approaching the end of that build in April last year, I was offered an old CB750 on a chance conversation. I paid very little money for it as I thought it might be on its way to the scrapyard but here I am just trying to get the finishing touches.

The engine was seized, the carbs were off and it had been standing for nearly 20 years in a damp shed. I thought I would remove the engine and see what I could do with it before attempting anything else with the rest of the bike.

Over the next few months I got the engine unstuck and cleaned up and repaired what I could. Giving the top end a refurb and eventually got the engine running in a stand before attempting the rest of the bike.

As it was too far gone to restore, I thought I would try to make a café racer.
I have probably gone for every cliché in the book but I am quite pleased with how it looks so far.

I probably should have joined before now as I have lurked on a few of these forums and found really helpful information, so I must thank you all for that.

Anyway I will post a few pics before I say any more just now. I do have a few questions but will hold back on them just now. See what you guys think, constructive criticism welcome.

Oh by the way it’s a 1978 CB750F2 SOHC (or was anyway).

I also have an XT350 as mentioned and an FZS600 Fazer. The bikes date from 1978, 1988 and 1998.

Cheers, Magnus.