| Diagram | CHAINCASE AND CHAINS |
| Subsystem | primary |
| Listed in parts books | Not catalogued by year yet |
Chaincase
A primary chaincase cover, listed under part number 11727, with limited catalog detail on file.
Part number 11727 is listed as a chaincase, the outer cover that encloses the primary drive on the left side of the engine. This is the housing that keeps the primary chain, clutch, and engine/gearbox sprockets running in an oil bath and out of the weather.
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The catalog record we have for this one is thin, just the single figure entry under CHAINCASE AND CHAINS with no model or year tied to it beyond a single-year window in our records. We would not call this a Triumph part just because of how it turned up in our system; the manufacturer tag on file doesn't line up with what a chaincase actually is, and we're not going to guess at a brand here.
Given how little detail we have, treat this as a starting point rather than a confirmed match. Call the shop with your bike's details and we'll get you sorted on the correct chaincase before you order.
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