| Also known as | E4142 |
| Diagram | Fig. 1 — CRANKSHAFT AND CONNECTING RODS · ref 40 |
| Subsystem | engine bottom |
| Listed in parts books | 1966–1967 |
DOWEL ET 500 ALT ROTOR
A crankshaft-area locating dowel for the alternator rotor on the 500 twin, part number 70-4142.
This is a dowel pin listed in the crankshaft and connecting rods section of the parts book, tied to the alternator rotor fitment on the 500 twin. Dowels like this one are used to locate a component precisely on the crankshaft or rotor so it seats in the same position every time it's removed and refitted.
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The catalog entry is brief, so we don't have more detail on this one beyond its place in the crankshaft and rotor assembly. It also carries the older E4142 form as well as a supplier number, 98985A309, which you may see referenced in some parts books or supplier lists as the same piece.
If you're working on a bottom end rebuild or swapping an alternator rotor and need to confirm this is the right dowel for what's on your bench, give us a call before ordering and we'll check it against your engine.
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