| Diagram | Fig. 25 — ELECTRICAL EQUIPMENT · ref 38 |
| Subsystem | electrical |
| Listed in parts books | 1963–1968, 1970–1974 |
Rectifier, type 2DS 506. (99-0589)
Lucas type 2DS 506 rectifier (99-0589), converts alternator AC to DC for charging.
This is the Lucas rectifier, type 2DS 506, also cataloged under 99-0589. It shows up across a wide run of electrical figures in the catalog record, from early nacelle-and-headlamp wiring setups through the later coil, capacitor pack, flasher unit, zener diode and horn groupings, which tells you it was a common fitment across a long stretch of the electrical system's evolution rather than a one-off part.
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A rectifier's job is straightforward: it takes the AC current coming off the alternator and converts it to DC so the battery can charge properly and the rest of the electrical system has usable current. On these machines it typically works alongside a zener diode, which is why you'll see the two called out together in the parts book figures.
The catalog entry doesn't spell out a specific model or year for this exact application beyond the broad range it appears across, so if you're chasing this for a particular bike, check your own wiring setup against what's listed before you order. Give the shop a call if you want to talk through fitment.
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