SOHC.co.uk Forums > CB750

Getting closer

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K2-K6:
The bike looks really good Mark, quite envious of it as I do think it's one of the nicest modifications to do to this type of bike if not left standard.

The standard rear brake with rod operation is quite powerful on these and will easily have the back hopping without much effort. The 70's bikes I've ridden with cable rear drums have usually had a softer action which I've always found more controllable just when you don't want to try and concentrate on being careful with it, so I feel they are easier to use so may be worth a go to see what you feel about them. That double setup at the front will also get the bake very light if you have the right master cylinder ratio as well, so you probably won't need that much back brake ayway. just comes down to prference I guess.

Anyway, you've got something really good coming out of your hard work, thanks for posting the pictures.

MarkCR750:
Cheers K2, to be honest I had a few pangs of guilt re destroying the K7 donor, it was in a very poor state though, I bought a GT750 rear brake cable to start the conversion but got tempted by the time saving of just flipping the rear brake arm and connecting the rod to the rear set lever with zero modification!, I was talking to Dave Perry at Classic Racing Hondas and he said that he thought the rear brake felt underpowered after converting to cable, although I take your point entirely that it could be too sharp with the rod, especially with the bike being so much lighter than standard, I'll see how it feels when completed and its only a few hours work to convert if needed.
I'm reasonably sure I have the front brake piston ratio dead wrong at the moment!, I have used a Fireblade master cylinder but have a bit too much lever travel, David Silver sells pattern Goldwing master cylinders for about £40 though so I'll swap to one of those soon, Dave Perry uses them on his replicas and the lever travel is much less than on mine.

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