| Also known as | H4087 |
| Diagram | Fig. 19 — FRONT FORK · ref 13 |
| Subsystem | forks front |
| Listed in parts books | 1971 |
Main spring
Front fork main spring for 1971, part 97-4087, later superseded by 97-4011.
This is the main fork spring, part number 97-4087, listed under the FRONT FORK section of the parts book and also known by its earlier alias H4087. It's the spring that lives inside each fork leg, doing the job of holding the front end up and giving the fork its basic ride rate before the damping takes over.
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Our catalog record shows this part appearing for the 1971 model year, and it was later superseded by 97-4011, so if you're working from a newer parts book or a later fork rebuild kit, that's the number you'll likely see instead. Same physical part in the fork leg, just a different factory number depending on which book you're holding.
If you're rebuilding a front end and pull an old spring stamped with either number, they're the same component in the eyes of the parts books. Give us a call if you want to confirm which one matches your fork internals before ordering.
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