| Also known as | T1525 |
| Diagram | Fig. 7 — GEARBOX AND CASING · ref 1 |
| Subsystem | gearbox |
| Listed in parts books | 1960–1962 |
GEARBOX COMPLETE — STANDARD RATIO
A complete standard-ratio gearbox assembly, factory part 57-1525 (formerly listed as T1525).
57-1525 is a complete gearbox assembly, standard ratio, as listed in the GEARBOX AND CASING section of the parts book. This is the whole box as a unit rather than a piecemeal collection of internals, so when a catalog entry calls out "complete" it means the casing and its full set of gears and shafts are meant to go together as one item.
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The old book number for this one is T1525, which you will still see on some parts lists and invoices from the era. The catalog shows this part turning up across entries from 1960 to 1962, so it belongs to that stretch of production, though we don't have more specific model-year fitment detail than that on file.
If you are trying to match this up to a bike, bring us the casing or your parts book reference and we will confirm before you order. A gearbox swap is not the place to guess on fitment.
We've never carried this one. Tell us what you're after and we'll go looking — you'll get a price and photos before you commit to anything.
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