| Also known as | E5976 |
| Diagram | Fig. 15 — CHAINCASE AND CHAINS · ref 5 |
| Subsystem | primary |
| Listed in parts books | 1967–1968, 1970–1971, 1974 |
| Also fits (as replacement) | 1974 · for 70-4147 |
Chain tensioner abutment
The chain tensioner abutment for the primary chaincase, PN 70-5976, formerly 70-4147.
This is the chain tensioner abutment, PN 70-5976, the older factory number for this same part being 70-4147. It shows up in the catalog under the CHAINCASE AND CHAINS and CRANKCASE figures, which puts it in the primary drive area of the engine.
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An abutment like this works as part of the primary chain tensioning setup, giving the tensioner blade or adjuster something solid to bear against so it can take up slack in the primary chain over time. If your chaincase has been rattling or the tensioner adjustment feels like it has nowhere left to go, a worn or damaged abutment is worth checking.
Our catalog entries span 1967 to 1974 across nine appearances, so this part has been in the parts books for a good stretch of that era. Confirm fitment against your own primary chaincase setup before ordering, since we don't have model-specific breakdowns tied to this number.
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