| Diagram | Fig. 1 — CRANKSHAFT AND CONNECTING RODS · ref 24 |
| Subsystem | engine bottom |
| Listed in parts books | 1960–1962 |
Rotor
An RM15 alternator rotor that keys onto the crankshaft to generate charging current.
Part number 423506 is listed as a rotor in the crankshaft and connecting rods section of the parts book, which is a bit unusual since rotors for the charging system normally show up under electrical or alternator listings. The catalog title on record for this number identifies it as an RM15 alternator rotor, which tells us it's the magnetized center piece that spins with the crankshaft and generates the current for the bike's charging system.
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Because it turns up filed alongside crank and rod parts, it's worth double-checking against your own engine before ordering — the rotor keys onto the crankshaft and its fit is tied directly to that shaft, so any crank-related figure grouping makes sense even though the part itself belongs to the alternator side of things.
Our catalog record for this one only goes back to 1960 through 1962 across the listings we have, so if your bike falls outside that window, give us a call and we'll confirm fitment before you order.
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