Alternative Front Brake Master Cylinder

[headcoats]

Anyone using one off another bike ?
A radial one perhaps ?

[Luders]

I'm using a ZX6 Nissin radial MC Martin if that helps, brakes feel amazing.

[headcoats]

Cheers Luders

Just can't get the feel of the standard one unless I have done something wrong, I have to use 4 fingers to pull up at any urgency

Only been on bike 7 years

I have been riding other bikes (Buell, Bonneville) and they have a better feel for sure

[Luders]

yeah one of those should help a lot with feel. 2 finger braking is all you should need.

[Luders]

One second hand locally
http://www.ebay.co.uk/itm/322307915126

[headcoats]

£99

You know I'm a tight funt

[JanBros]

Just can't get the feel of the standard one unless I have done something wrong, I have to use 4 fingers to pull up at any urgency

something is definitly wrong, I never needed 4 fingers.

[headcoats]

This is what I thought

Brakes were all rebuilt with genuine seals and master cylinder , stainless pistons and braided lines

One thing was that they were a pig to bleed , just couldn't get the last bit of air out until I cable tied the front brake lever back overnight

Have noticed though if I haven't been on bike for a few weeks they feel spongy until I pump the lever

That's why I think the master cylinder is suspect

Always passed the MOT and I MOT mine at a brake specialist who test the brakes on their drum machine

[Luders]

Sounds likely Martin

[JanBros]

still air in them.

[Professor]

I've fitted a Brembo aftermarket radial master cylinder to my KR, works very nicely and is very well made.

Did you have two simple brake hoses fitted? this makes it a little easier bleeding than the original setup of 3 pipes with a splitter.

You could clean out the original master cylinder and fit a new seal kit and brake lever inc pivot bolt if you want to keep it original? They work reasonably well as standard if the bore isn't worn.

If the brake calipers have been cleaned out properly then the new pistons should slide back in the caliper freely and smoothly, try pushing them back to check? I prefer the genuine pistons, is there any difference to the problem if brakes are hot or cold?

[mellorp]

When you bleed the lines don't forget to bleed the top banjo bolt as well. Friend of mine spent 2 hours bleeding his brakes and got nowhere. 30 seconds after bleeding the top banjo bolt the lever pressure was perfect

[headcoats]

They do get better as they warm up

[Marty_Rillo]

I had a hell of a time bleeding up freshly rebuilt calipers and master cylinder.
The over night cable tie helped, but what made the biggest difference was taking the bike out and generating a lot of heat using it a few times.
It went spongy when cold for a few rides, but ended up feeling very good indeed.

Oh and I got a zxr400 master cylinder, loads about as those pesky kids can't stay upright.
Cheers martin.