| Also known as | 68-0657 |
| Diagram | Fig. 4 — CRANKSHAFT · ref 24 |
| Listed in parts books | 1970–1972 |
| Also fits (as replacement) | 1970–1972 · for 68-0647 |
T/S CRANK BUSHING USA
Timing side crankshaft main bearing bush, PN 68-0657A, supersedes the earlier 68-0647.
This is a timing side main bearing bush for the crankshaft, listed in the catalog as T/S Crank Bushing USA under part number 68-0657A, with 68-0657 as the earlier factory number it replaced. It sits in the timing side of the crankcase, where it supports the crankshaft as it spins.
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The catalog record here is thin, so beyond identifying it as a crank bushing on the timing side, we don't have more detail to add on which specific models it was cataloged for. Given that it's a bearing surface item, get your case measured and confirm the size you need before ordering, since these come in different bushing sizes for the same bore.
If your parts book lists 68-0647, that's the older number for this same physical part - the two are the same bushing under different factory numbering.
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