| Also known as | T1237 |
| Diagram | Fig. 14 — CHAINCASE AND ALTERNATOR · ref 15 |
| Subsystem | primary |
| Listed in parts books | 1960–1962 |
Outer chaincase
The outer chaincase cover for the primary drive, sealing in the chain and clutch on the left side of the engine.
This is the outer chaincase, the cover that bolts over the primary drive and closes off the chaincase compartment. It's the part you look at from the left side of the bike - the panel that seals in the primary chain, clutch, and alternator so oil stays where it belongs and road grime stays out. In the parts books it's shown in the CHAINCASE AND ALTERNATOR figure, which tells you it's grouped with the alternator hardware on the inside.
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Older catalogs list this one under the T1237 designation before the shop switched over to the numeric 57-1237 format - same physical piece either way, so if you're working from an older book and see T1237, that's this cover.
Our catalog record on this one only shows it turning up in listings from the early 1960s, so if you're trying to match it to a specific model year, give us a call and we'll go through what we've got before you order.
We've never carried this one. Tell us what you're after and we'll go looking — you'll get a price and photos before you commit to anything.
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