I had a nifty matched set of Aprilia brake and clutch master cylinders lined up for the Aermacchi-Ducati Special, but both right and left are 14mm units. That’s waaay too large for just the single Yamaha blue-spot I’m using on the front.

So Instead, I picked up a brand-new 11mm Grimeca (OE for MZ 2-stroke singles). It’s not nearly as stylish, but it calculates out as an ideal match to the caliper.

Unfortunately, 14mm is also too large for a VTR250 front brake, so I can’t even hand the old one down to The Bride.

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