| Also known as | T4397 |
| Diagram | Fig. 12 — PARTS REQUIRED FOR OPTIONAL 5 SPEED GEARBOX · ref 28 |
| Subsystem | gearbox |
| Listed in parts books | 1971 |
Gearbox sprocket—19T
19-tooth gearbox mainshaft sprocket for the optional 5-speed gearbox conversion, 1971 catalog listing.
This is the 19-tooth gearbox sprocket listed in the parts required for the optional 5-speed gearbox conversion, catalog year 1971. It's the sprocket that mounts on the gearbox mainshaft and drives the final chain, splined to take the drive off the transmission and send it back to the rear wheel.
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The old book number for this one is T4397, so if you're working from an older parts list that's the number you'll see instead of 57-4397 — same physical part either way.
Because it's tied specifically to the optional 5-speed gearbox listing, don't swap it in on a standard 4-speed box without checking tooth count and spline fit against what's already on your mainshaft. Give us a call if you're not sure which sprocket your box takes.
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