| Diagram | Fig. 16 — SWINGING FORK, SUSPENSION UNITS AND CHAINGUARD · ref 43 |
| Subsystem | primary |
| Listed in parts books | 1969 |
Stop lamp switch, type 2B (4033234)
Stop lamp switch, type 2B, for triggering the rear brake light — Triumph part 99-0725.
This is a stop lamp switch, catalog type 2B, listed under Triumph part number 99-0725. It's the switch that trips the brake light when the rear brake is applied, and the factory identified it with the reference number 4033234 in addition to the standard part number. Our records show it later carried forward under the number 54033234T, so if you're chasing down a replacement or trying to match what's on the bike against an old parts book, either number should get you to the same physical part.
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The catalog places this switch in with the swinging fork, suspension units, and chainguard section, which is typical for a rear brake light switch since it's usually actuated off the rear brake linkage rather than the front lever. We don't have more detail on this one beyond that, so if you're not sure it matches what's currently on your bike, give the shop a call and we'll help confirm before you order.
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