| Also known as | GB34, T2678 |
| Diagram | Fig. 3 — GEAR CLUSTER AND TIMING COVERS · ref 7 |
| Subsystem | engine bottom |
| Listed in parts books | 1968, 1970–1971 |
THRUST WASHER,BSA .093-4
A thin thrust washer, PN 57-2678 (also listed as GB34), around .093 in. thick.
This is a thrust washer, catalog number 57-2678, also known under the older GB34 designation. The description on file ties it to BSA and lists a thickness spec of .093-4, which lines up with a gearbox spacer/washer of that same thin dimension seen in other catalog listings.
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Thrust washers like this one sit against a shaft or bearing face to take up end float and keep rotating parts running true rather than walking side to side. Beyond the thickness figure in the catalog record, we don't have more detail on this one in terms of exactly which shaft or gearbox location it mates to.
Given the shared BSA reference in the description, give us a call before you order so we can confirm this washer matches what's in your gearbox or shaft assembly.
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