| Also known as | T500 |
| Diagram | Fig. 7 — GEARBOX INNER COVER AND SELECTORS · ref 3 |
| Subsystem | gearbox |
| Listed in parts books | 1960–1962, 1964–1965, 1967 |
CAM PLATE 650 TRI TO 72 - Use 57-4055
Gearbox cam plate for the 650 Triumph, used through 1972 production, now superseded by 57-4055.
This is the gearbox cam plate for the 650 Triumph, listed in the parts books through 1967 and used up to '72 production before the part was superseded. It's the notched plate that sits inside the gearbox inner cover and works with the selector mechanism, translating movement from the selector forks into gear changes as you work the pedal.
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The catalog also lists this under the earlier T500 number, so if you're working from an older parts book or a bike with T-prefix numbers on the tag, T500 and 57-0500 are the same physical piece.
Our records show this part was superseded by 57-4055, so if you're ordering for a later gearbox or can't find 57-0500 in stock, that's the current equivalent. Worth double-checking your gearbox internals against the parts book before ordering, since cam plates changed over the years and swapping in the wrong one can throw off your shifting.
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