I have a problem, i have two 0.7 master cylinders with balance bar connected to cortina calipers and solid disc on the front and drums on the back, I adjusted the balance bar so that the rear is on the shortest side and the cylinder rod is screwed in the furthest on the rears compared to the fronts.

The rears lock up first, so i changed the fron t master cylinder to a 0.625 with the same settings and re-bleed the brakes but the backs still lock up first

Any ideas?

If you are sure that everything is working properly in the front circuit (properly bled and no blockages or master cylinder problems and push rod inline with mc) then your next step would be different sized wheel cylinders for the rear brakes (smaller??)

One other thing you could try is to swap the MC's round to see if that doesn't swap the problem round - then at least you know that MC's are or aren't ok.

[Edited on 9/10/07 by Ivan]

whoa - if the shortest distance is to the rear m/c you'll be putting most pressure on the rears so they'll lock first.
imagine if the rear m/c was right under the pivot - you'd get all the pressure on the rear and none on the front.
or have I got the wrong end of the stick?
Bob

shortest distance on the balance bar but with the longest amount of the master cylinder threaded into the balance bar if that makes sense

Have you left enough slack in the bias bar to allow it to do its job properly? I used a couple of stainless 'repair' washers to make sure nothing was binding under braking pressure.
You could also try lengthening the pushrod on the front m/c to get a little more bias.

[Edited on 9-10-07 by RazMan]

there is enough slack, i can't make the rod any longer on the front one or shorter on the back one.

I read somewhere about moving the pivot point closer to the cylinder that needs more force, but this is the opposite from what i have read on here

Set the balance bar up so the spherical bearing is dead central.

Then adjust one turn at a time -- screwing the spherical bearing closer to the front circuit master cylinder INCREASES the braking at the front.

Thanks Britishtrident i think this solves all my problems, i've been adjusting the wrong way, i'll try this later tonight and hopefully get it working right,