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How to Find the Correct Master Cylinder
or Replacement Parts
From the early days of hydraulic disc brakes for motorcycles, Brembo has supplied master cylinders for a variety of applications and mountings, including handlebar-mount brake and clutch units, and rear-mounted master cylinders for standard and integrated brakes. This broad selection is augmented by the availability of integral and remote-reservoir variants in brembo OEM and "Gold Line" versions and the latest development in front master cylinder technology- brembo's "Radial GP" unit, whose original design offers the ultimate in feel, adjustability, compactness and lightweight forged-alloy construction.
There are eight "families" of master cylinders produced by brembo over the years, as well as some one-off varieties.
There are two ways to identify your brembo master cylinder for
repair or replacement:
1. Check INDEX-1 (pg.62 - 70) “brembo Master Cylinders & Calipers-OEM Applications” for the part number of the unit fitted as OEM to your machine. Check this number against the “Master Cylinders Cross-Reference” (pg.20) for the unit type. Refer to images in the “brembo Master Cylinders” section (pg.22 - 23). Compare your unit to the image found in this section and order accordingly.(Due to production line variations by the manufacturers, we recommend verifying your needs by also utilizing the next method ).
2a. Can’t find a matching part number? Find the piston size of your unit: Front Master Cylinders - check the top or bottom of the lever clevis for a stamped alphanumeric string. The last two digits in the string indicate the piston size in mm (EXAMPLE: ‘1PJK 15’ = 15mm piston. In the case of ‘Radial-GP’ pumps, you may see a ‘PR’ or ‘/’’ stamping, followed by a number. If the number is “19x18” or “16x18”, the first number is piston size, the second refers to the pivot centers of the unit’s lever). Rear Master Cylinders - for lever-types, check clevis area as above. If rod-actuated, check the entire body for the alphanumeric string or a string starting with ‘PS’ (EXAMPLE: ‘PS12’ = 12mm piston). In some cases, there will be no stampings at all - if this is the case, contact us for assistance.
2b. Scan the appropriate pages in the “brembo Master Cylinders” section (pg.22 - 39) for an image corresponding to your unit. The correct replacement or repair part number information, based on the model & piston size of your unit will be on the facing page.
(Further note - the raised number on cast units IS NOT the part number, and is only useful as a start- ing point in master cylinder identification. DON’T confuse the cast number with the part number!).
Click on the master cylinders below for more detailed information:
FRONT MASTER CYLINDERS:
(LRD) FRONT, LARGE ROUND RESERVOIRS
(standard & remote styles)
(SRD) FRONT, SMALL ROUND RESERVOIRS
(standard & remote styles)
(REC) FRONT, RECTANGULAR RESERVOIRS
(REM) FRONT, INLINE REMOTE RESERVOIRS
(RAD) FRONT, "RADIAL-GP" REMOTE RESERVOIRS
(FNS) FRONT, "NON-STANDARD" TYPES
REAR MASTER CYLINDERS:
(RRD) REAR, ROUND RESERVOIRS
(R50) REAR, REMOTE RESERVOIRS, 50mm MOUNT
(R40)/(RNS) REAR, REMOTE RESERVOIRS, 40mm
MOUNT/non-standard MOUNT
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