Topic: Which modern master cylinder?

[Chris Liston]

93' Ninja ZX7R.  Using it because it was the cheapest on Ebay at the time.  5/8" piston too.

[Sam Green Racing]

We run twin discs on the CR with stainless hoses right up to the master cylinder, that's from a NC30 VFR400R.

We only paid £40 from David Silvers.

WE run stock calipers and pads.

Sam.

[bwaller]

I'm using a master from an 85 Interceptor on one bike, a ZX12 on another, and a GSXR on a third. All for dual disc set-ups. I stick to the sport bike stuff, but just about any model will do. These type master cylinders use a small mechanical brake light switch so you can eliminate the original junction tee with the hydraulic switch and run the single or dual lines direct from the cylinder to the caliper (s) By eliminating fittings you eliminate places for air to accumulate and bleeding is simplified. Sound like a broken record?

[neilbron]

Hi guys - really interesting. And sounds like a very worthwhile mod.

Any thoughts on WHY the improvement?
Better engineering/tolerances? Seal materials?
After all - it is just a lever moving a piston

Would a brand new or completely refurbished original m/c work as well?

Cheers,

Neil.

[ProTeal55]

Bigger Piston = Moving More Fluid = Better Stopping Power
Stainless Steel Line = No line expansion = Better Stopping Power

[/b]

[lassenc]

Too large a diameter is not good either!

[neilbron]

Bigger Piston = Moving More Fluid = Better Stopping Power
Stainless Steel Line = No line expansion = Better Stopping Power

[/b]

DOH! Sorry guys - gotta get a break from working these 14 hour days.

Neil.

[KCs76Cafe]

1998 Suzuki Katana master cyl......it already has the angle which allows you to check and add fluid with Clubmans.

[chippyfive50]

heres the one I bought, it looks good on the bar, but i dont have it hooked up yet.....
http://www.speedwerks.com/catalog/c0m0bm0b0s1pn0p4182np0

[cd811]

I'm running a 06 trx450 m/c on my bike...it was cheap from honda...$50...ss russell brake lines were expensive  ......with (2) 6 piston calipers, that thing will stop

[techy5025]

Maybe I'm wrong....but I thought that the force on the pad was equal to the
area ratio of the caliper piston bore to the master cylinder bore times the mechanical
advantage of the brake lever...which depends on where you hold it.

If you make the bore bigger you actually cut down on the applied pressure to the
pad, but you reduce the travel of the lever by the ratio of the increased area (not diameter).

If you want to get more stopping power you should go with a smaller bore and accept more
movement of the brake lever....assuming the same force at the same position on the brake
lever of course.

Even with dual disks, I'll bet the standard bore has enough travel. After I changed to stainless
lines and properly bled them, I still have at least an inch of travel with as much force as I can
place on the lever.

Jim