| Diagram | Fig. 15 — HANDLEBARS, CONTROL LEVERS AND CABLES · ref 13 |
| Subsystem | controls |
| Listed in parts books | 1971–1972, 1974 |
HANDLEBAR SWITCH—L. H.
Lucas-style left-hand handlebar switch (turn signal side), catalog PN 39595, also known under the earlier factory number 54033666.
This is the left-hand handlebar switch, Lucas-style, the unit that carries the turn signal function on that side of the bar. It shows up across the electrical equipment and handlebar/control-lever figures in the catalog from 1971 through 1974, so it's the switchgear you'll find on that generation of bikes using this style of Lucas switch housing.
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The part number 39595 has an older factory number behind it, 54033666, which is the same physical switch under an earlier designation - if your parts book lists that number instead, it's the same unit.
These switches take a beating from weather and years of thumb use, so cracked housings, worn contacts, and sticky indicator action are common reasons to replace one. Since the catalog data doesn't spell out which specific models this went on beyond the figure titles, check your bike's switch housing and wiring against the physical part before ordering.
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