| Also known as | H4200 |
| Diagram | Fig. 10 — TELESCOPIC FORKS · ref 37 |
| Subsystem | forks front |
| Listed in parts books | 1971 |
Damper tube and valve assembly
Internal damper tube and valve for a telescopic front fork leg, controlling oil damping as the fork moves.
The damper tube and valve assembly is part of the internal works inside a telescopic front fork leg. It's the piece that controls oil movement as the fork slides up and down, giving the front end its damping action rather than just letting the springs bounce free. This part shows up in the fork parts-book figures under the number 97-4200, with the older H4200 form being the same physical piece from before the modern numbering.
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On these fork assemblies the damper tube rides down inside the slider and stanchion, and the valve at its end meters oil through drilled passages as the leg compresses and rebounds. If you're rebuilding a fork leg and this part is worn, scored, or the valve isn't seating right, you'll get inconsistent damping - one leg soft, one leg harsh, that kind of thing.
Our catalog record ties this to telescopic fork work appearing in 1971, but it doesn't spell out which specific model that fork assembly belongs to. Best to check the part against what's actually in your fork legs before ordering, since fork internals changed around through this era.
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