| Diagram | Fig. 19 — Handlebars, Disc Brake Master Cylinder and Hose Group · ref 17 |
| Subsystem | engine top |
| Listed in parts books | 1975 |
Norton Cup, Secondary
A secondary cup for a Norton front brake master cylinder, catalog number 06-1945.
This is a Norton part number, 06-1945, listed in the catalog as a secondary cup. The catalog places it with the front brake master cylinder and hose group, which points to it being a component inside the master cylinder assembly rather than anywhere on the engine top end despite how it's filed here.
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The entry only shows up once in our records, tied to 1975, and there's no further breakdown of size or material given. If you're rebuilding a Norton front master cylinder from this era, this is worth checking against what's actually in your unit before ordering.
We don't have more detail on this one beyond what's above. Call the shop and we'll confirm fitment before you order.
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