| Also known as | T1476 |
| Diagram | Fig. 10 — CHAINCASE AND CHAINS · ref 1 |
| Subsystem | primary |
| Listed in parts books | 1964–1970 |
Gearbox sprocket (18 th) T100S, T100C, T100T
18 tooth gearbox sprocket for the T100S, T100C, and T100T, fitted in the chaincase at the transmission output.
This is the gearbox sprocket, 18 tooth, that lives at the output end of the transmission on the T100S, T100C, and T100T. It sits under the chaincase and carries the final drive chain from the gearbox mainshaft back to the rear wheel sprocket. In the catalog it shows up in the CHAINCASE AND CHAINS section, right where you'd expect for a part that spends its life running dry or oil-bathed depending on your chaincase setup.
Read more
Older parts books may list this same piece under 57-1558, which this number superseded, and the shorthand T1476 turns up too if you're cross-checking against an older list. If you're chasing a sprocket for one of these smaller unit twins, this is the part number to have in hand at the counter.
Our records show this part across catalog listings from 1964 through 1970. If your bike falls outside that window, or you're not sure which tooth count you've currently got fitted, bring in the old sprocket or give us a call before ordering so we can match it up.
Sorry if we got something wrong here. If you think this information isn't correct, .