| Also known as | 6T 1/64, 6T 1/64 |
| Diagram | Fig. 15 — CHAINCASE AND CHAINS · ref 18 |
| Subsystem | primary |
| Listed in parts books | 1976–1980, 1983, 1985 |
PRIMARY GASKET 650/750 - Replaces 71-1463
Primary chaincase gasket for 650/750 Triumph unit twins, catalog number 71-7009.
This is the primary chaincase gasket, catalog number 71-7009, listed for the 650/750 twins. It replaces the earlier 71-1463 number, so if your parts book or an old box shows 71-1463, that's the same gasket under its previous number. Triumph later renumbered this part again to 57-1770, which is worth knowing if you're cross-checking against a newer parts list.
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The gasket seals the primary chaincase, sitting between the inner and outer covers where the engine sprocket, clutch, and primary chain live. Its job is straightforward: keep the primary chaincase oil in and keep dirt and air out.
Our catalog record only ties this to the 650/750 unit-twin family, without pinning down exact model years, so if you're matching it to a specific machine, best to compare it against what's currently on the bike or give us a call to confirm before ordering.
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