| Also known as | 99-2751 |
| Diagram | Fig. 23 — FRONT BRAKE · ref 6 |
| Subsystem | brakes |
| Listed in parts books | 1976–1980, 1983 |
CAP, MASTER CYLINDER RESERVOIR
Reservoir cap for a Triumph hydraulic brake master cylinder, front or rear, PN 60-4365 (later 99-2751).
This is the cap that fits over the master cylinder reservoir on the front or rear hydraulic brake system, holding the brake fluid in and keeping dirt out while letting the diaphragm underneath flex with fluid level. It shows up in the parts book under both front brake and rear brake figures, since Triumph used the same cap on both reservoirs where hydraulics were fitted.
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Catalog records for 60-4365 run from the mid-'70s into the early '80s, and the part was later renumbered to 99-2751, so if your parts book or an old invoice lists that number instead, it is the same physical cap. Worth checking the reservoir body it threads or snaps onto before ordering, since fitment depends on which master cylinder assembly you have.
A cracked or missing gasket under this cap is a common reason for slow fluid loss or a soft lever feel, so it is worth a look if you are chasing a brake problem on a bike with disc brakes front or rear.
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