| Also known as | O178 |
| Listed in parts books | Not catalogued by year yet |
CHROME 2IN FUEL CAP VNTED
Chrome 2 inch vented fuel cap, Triumph part number 82-3216V (aka O178).
This is a 2 inch chrome fuel cap, vented, listed under Triumph part number 82-3216V (also found under the older O178 designation in some parts books). It's a threaded or bayonet-style cap sized for a 2 inch filler neck opening, finished in chrome.
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Being vented, it lets air into the tank as fuel level drops so the system doesn't develop a vacuum that can starve the carb. That's the main job of a cap like this beyond just keeping the fuel in and the weather out.
We don't have a lot more detail on this one in our records beyond what's above. If you're not sure your filler neck is the 2 inch size or need to confirm the cap style matches what you've got, give the shop a call before you order.
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