Yellow tag and brake compensation valve.
Turbo Mini Forums

Hi running a yellow tag master cylinder, but have no braking force whatsoever. It bled up no air at all. But wondering what ive done wrong, could it the the compenstator valve gone wrong or was i meant to remove this when using the yellow tag dual cylinder?

Ditch the bulkhead mounted one and try and source the early rear subframe mounted one's.
I've got this setup on my track car using 4 pot's at the front, and the brakes are amazingly good.

I have removed it on my car and fitted an adjustable bias valve for the back brakes.

You did fit the pedal/pedal box that I sent you?

yeah, bin the stupid valve. I have just fitted an adjustable bias valve in the rear pipe.

But Andy's solution is the best idea.

Fastest 998 mini in the world? 13.05 1/4 mile 106mph

Andy i did fit it all... Cheers.

Ok i will get a rear bias on order.

Thanks.

Edited by Rick.SPI on 14th Sep, 2013.

Have you got it plumbed in the right way round? The back is the bottom port on the cylinder.

We are having a similar problem.

Brand new yellow tag master cylinder. It's not even pushing fluid out the pipes. Both pipes undone, cylinder full of fluid but pumping nothing out.

Faulty master?

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

Schrödinger's cat - so which one am I ???

Thanks Rod,

A bit of pressure on the reservoir and we have some fluid coming out the lower port.

I'll get a proper Eezibleed and try again.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

The other trick, if the pistons are really sticky (didn't have to do this on the Mini but on a previous project) is disconnect both outlets and put a little bit of compressed air on the lower connection first (push the bottom piston down) then the top connection (push the top piston down on top of it) which uncovers both inlet drillings.

Schrödinger's cat - so which one am I ???

Yes they are on the right way, comp valve ditched and sorted, brakes working :)

Cheers.

Oh and for the initial bleeding, i had the trouble at first, what i did was wedged the pedal open, undid 4 bleed nipples and let gravity tun its course, tighten them when they run, then bleed it properly from there.