| Also known as | 1812, E4871 |
| Diagram | Fig. 2 — CRANKCASE · ref 16 |
| Subsystem | engine bottom |
| Listed in parts books | 1963–1964 |
GASKET T20 CHAINCASE
Chaincase gasket for the Triumph T20 Cub, part 70-4871.
This is the chaincase gasket for the T20, Triumph's small-bore Cub model. It's a Triumph part despite the crankcase-family filing you'll sometimes see it under in the parts books, and it seals the chaincase cover where the primary drive lives. Catalog listings for this number tie it specifically to the T20 and span 1963-1964.
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It also shows up under the alternate numbers 1812 and E4871, so if you're working from an older parts list or a different reference and see one of those, it's the same gasket. Given how thin and inexpensive these are, it's a part worth having a spare of on hand whenever you've got the chaincase cover off, since gaskets rarely come off intact.
We don't have much more detail on this one beyond what's in the catalog record. If you're not sure it matches your particular Cub, give the shop a call and we'll confirm before you order.
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