| Diagram | Fig. 22 — Handlebars, Disc Brake Master Cylinder and Hose Group |
| Subsystem | brakes |
| Listed in parts books | 1975 |
Norton Kit, Repair, Master Cylinder
Seal rebuild kit for a Norton front disc brake master cylinder, PN 06-4244.
This is a rebuild kit for a Norton front disc brake master cylinder, listed under PN 06-4244. Our catalog shows it appearing in both the front brake master cylinder group and a rear hydraulic system figure, so it covers the seal work inside the cylinder body that pushes fluid out to the caliper when the lever is pulled.
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This is a Norton part, not a Triumph one - the description is explicit about that, and the manufacturer tag on our end lines up. If your master cylinder is leaking past the piston or the lever feels soft even after bleeding, the internal seals are usually the culprit, and this kit gets you the pieces to sort that without buying a whole new cylinder.
Our records tie this to 1975 catalog listings. Confirm which master cylinder body you have before ordering, since Norton ran more than one design across the Commando years and the shop can help match the kit to your unit.
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