| Also known as | 57-1476C, T1569 |
| Diagram | Fig. 11 — CHAINCASE AND CHAINS · ref 1 |
| Subsystem | primary |
| Listed in parts books | 1964–1970, 1974 |
Gearbox sprocket (20 th)
A 20-tooth gearbox final drive sprocket, later superseded to 57-1476C.
This is the gearbox sprocket that carries the final drive chain off the transmission, a 20-tooth piece that lives in the primary chaincase area on the models it fits. It's the mainshaft-side half of the final drive setup, meshing with the rear wheel sprocket through the chain.
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Our records show this part under 57-1569 and also as 57-1476C, which is the number it was superseded to at the factory — same physical sprocket, just a later catalog number. You may also see it listed as T1569 in older parts books using the letter-prefix system.
It shows up across catalog entries from 1964 through 1974, so there's a fair bit of history behind this number. If you're ordering, have your parts book or engine number handy so we can confirm you're getting the right tooth count and spline fit for your gearbox.
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