| Diagram | Fig. 13 — FRONT FORK · ref 14 |
| Subsystem | forks front |
| Listed in parts books | 1969–1970 |
BSA Fork oil seal
A front fork oil seal from the 1969-1970 front fork parts-book listings, fitted at the base of the fork slider to keep oil in and dirt out.
75-5099 is a fork oil seal that shows up in the front fork sections of the parts books for 1969-1970. It sits down in the bottom of the fork slider where the stanchion tube passes through, and its job is straightforward: keep the fork oil in and keep road grit and water out.
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These seals take a beating over time from age and heat cycling, and a tired one is a common reason for a wet leg or a fork that feels harsh because it's lost its damping oil. If you're pulling the fork legs apart for a service, this is one of those parts worth replacing while you're already in there rather than putting it back together and finding out later it was marginal.
Our catalog record ties this one to the 1969-1970 front fork figures, but it doesn't spell out which specific model that fork belongs to. Check it against your fork leg dimensions or give us a call before you order to make sure it's the right seal for what you've got.
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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