Ducati master cylinder - Suzuki GSXS1000 Forum
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post #1 of 6 Old 07-27-2018, 02:22 PM Thread Starter
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Ducati master cylinder

Hello.

Is this good choise for replace Nissin OEM pump?



https://www.ebay.com/itm/322037042284?ul_noapp=true
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post #2 of 6 Old 07-28-2018, 05:28 AM
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Originally Posted by yaluroo View Post
Hello.

Is this good choise for replace Nissin OEM pump?



https://www.ebay.com/itm/322037042284?ul_noapp=true
I wouldn't recommend a smaller diameter master cylinder, longer travel of the lever to create the same brake effort, remaining at 19 mm stock or going to a 20 or 21 mm is a better option by far.
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post #3 of 6 Old 07-28-2018, 05:48 AM
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[QUOTE=Robbieben;365054]I wouldn't recommend a smaller diameter master cylinder, longer travel of the lever to create the same brake effort, remaining at 19 mm stock or going to a 20 or 21 mm is a better option by far.[/QUOT

Brembo don't make a master cylinder larger than 19mm
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post #4 of 6 Old 07-29-2018, 08:41 AM
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There are other makes available with larger diameter master cylinders.
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post #5 of 6 Old 07-30-2018, 09:03 PM
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I am sure it would be fine. IIRC, the calipers have 4x32mm pistons, so the said master, set at 21mm fulcrum (creating a 16x21 master), would work quite well. I am running a Galespeed 17x17 (17.5mm piston and 17mm fulcrum length) radial master along with a pair of calipers with the same piston configuration (Nissin monoblocks from a 2010 Daytona 675) as the the GSX-S's Brembos and the combination is sublime (bike is a heavily modded 1999 VTR1000). The lever is soft, feedback is awesome and power is incredible; I suspect you would get a very similar result here. Some will try to steer you to the RCS19, but IMHO, even at its shortest fulcrum, it's still too firm (from one who likes a relatively soft lever for the added feedback it provides and improved modulation if offers). Far too many mistake a firm lever for braking power, don' fall into the trap.

FWIW, over the course of many years of experimenting with many varied and various braking components, I made the jump at one time from the Nissin 19x18 (which I believe is what the GSX has) to an OEM Ducati Brembo (the 18x19 unit used on many/most late-models ducs with M4 calipers) and the improvement was noticeable. May be another (cheaper) option for you.

Last edited by mikstr; 07-30-2018 at 09:09 PM.
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