| Diagram | CHAINCASE AND CHAINS |
| Subsystem | primary |
| Listed in parts books | Not catalogued by year yet |
Gearbox sprocket (19 th) 1 STA, T100R
A 19-tooth gearbox sprocket from the chaincase and chains section of the parts catalog.
This is a gearbox sprocket, 19 tooth, listed in the catalog as part number 71476/19. It shows up in the chaincase and chains figure, which places it in the primary drive area where power moves from the gearbox to the rear wheel via the final drive chain.
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The catalog entry ties it to models designated STA and T100R, but beyond that our record is brief and doesn't give further detail on years or exact fitment. If you're matching this against a chaincase teardown, count teeth and compare against what's currently on the box before ordering.
Call the shop and we'll confirm fitment before you order if you're not sure this is the right tooth count for your setup.
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