| Diagram | Fig. 15 — CHAINCASE AND CHAINS · ref 13 |
| Subsystem | primary |
| Listed in parts books | 1968–1970, 1973, 1976–1978 |
Stator, RM 21 (47205)
The RM 21 alternator stator, part number 99-1006, the fixed coil assembly that generates AC current for the charging system.
This is the stator listed in the parts books as RM 21, part number 99-1006. It's the fixed coil-winding component that pairs with the rotor to generate AC current for the charging system, and it shows up across the electrical equipment listings as well as in the primary drive and crankcase timing sections since the alternator setup sits behind the primary chaincase on these engines.
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The stator itself doesn't move — it bolts to the crankcase and stays put while the rotor spins inside it, driven off the end of the crankshaft. Because it lives right next to the primary chain and timing gears, it turns up in those figure listings even though its actual job is purely electrical.
Our catalog record has this part appearing across a run of years from the late '60s into the late '70s, but we don't have it pinned to a specific model here. If you're matching this to a particular bike, give us a call and we'll confirm fitment before you order.
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