'06 ZX636 master cylinder problems?

**pete376403** · 27th December 2012, 20:53

OK I had a (quick) look at centipoise wrt brake fluids and if i'm reading this correctly it is basically a measure of viscosity.

I could see where a thicker (higher viscosity) fluid could make it more difficult to bleed unless using a pressure bleeding pump, but dont see where the diameter of the master cylinder has a bearing, unless the higher volume of fluid displaced per stroke assists.

However, I have only theory, but you have practical experience in the matter.

Did you notice any trade-off in braking performance with the larger master cylinder?

**Wheeliemonsta** · 28th December 2012, 08:56

Originally Posted by pete376403

OK I had a (quick) look at centipoise wrt brake fluids and if i'm reading this correctly it is basically a measure of viscosity.

I could see where a thicker (higher viscosity) fluid could make it more difficult to bleed unless using a pressure bleeding pump, but dont see where the diameter of the master cylinder has a bearing, unless the higher volume of fluid displaced per stroke assists.

However, I have only theory, but you have practical experience in the matter.

Did you notice any trade-off in braking performance with the larger master cylinder?

No trade off at all Pete - just a massive improvement in consistancy of performance...

Cheers

**imdying** · 28th December 2012, 15:06

Just stick it together and have Mickey ride it down to work tomorrow morning. I'll have a bleeder somewhere, but if it' not leaking then it'll be fine.

Wheeliemonsta makes a interesting point... this is all factory 636 gear from the same year, yes?

**BADGRL** · 30th December 2012, 19:31

yup all looks factory to me, all the seals look really good. The whole bike's in exceptional condition it's only done 17clicks, 1 owner with full service history. I cleaned the m/c and put it back together, bled all the lines again over n over and it feels fine BUT I know in a month or so it'll be back to nothing. Nah it's definately not leaking anywhere you may be right maybe it needs a pressure bleed :S Haha Mickey can't ride atm