| Also known as | 1871, E11418 |
| Diagram | Fig. 5 — CLUTCH AND PRIMARY CHAINCASE · ref 6 |
| Subsystem | primary |
| Listed in parts books | 1971 |
GASKET PRMY BSA UNIT 1CYL
Primary chaincase gasket for BSA unit-construction single-cylinder engines, catalog number 71-1418.
This is a primary chaincase gasket for BSA single-cylinder unit-construction engines, listed in our records under 71-1418 (also seen as 1871). The catalog description ties it to BSA unit singles rather than to any Triumph model, so despite how it's filed in our system, don't reach for this one for a Triumph twin.
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A primary gasket like this seats between the chaincase cover and the crankcase, sealing the primary compartment so oil stays where it belongs and road grime stays out. On these unit singles that's the joint that keeps the clutch and primary chain running in a clean, oil-tight environment.
We don't have more detail on this one beyond what's in the catalog record. This part number has since been superseded by 70-7856, so if you're ordering fresh stock that's the number you'll likely get. Call the shop and we'll confirm fitment and current numbering before you order.
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