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Are the radial clutch/brake masters for Monster S4RS rebuildable?

Started by booger, February 17, 2026, 07:08:24 PM

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booger

February 17, 2026, 07:08:24 PM
I think I have a blown clutch master. I found a rebuild kit I think, at Gotham Cycles- 15mm. This got me thinking I might need to find a brake master kit as well to put away for when Brembo doesn't sell these anymore. But the brake master is reported to be 19mm per Google search. Can't find 19mm OEM Brembo brake master rebuild kits. Gotham seems to have everything and they don't have it. I think I might be operating on bad information. Are they really 16mm?

Does anybody know what is which with these vintage Brembo OEM radials??? Like what exactly are the bore and piston dimensions, what masters went on what bikes, etc. Are these anything like the 999 masters? Trying to find the correct parts and I'm confused.  ???
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2001 M900Sie - sold
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2008 HM1100S - sold
2004 998 FE - $old
2007 S4RT
2007 Vespa LX50 aka "Slowey"
2008 BMW R1200 GSA

ducpainter

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Today at 04:48:42 AM
I don't know the size, but on most Brembo masters the bore diameter is cast/stamped/etched on the bottom near the banjo.
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