The BSA A7-A10 Forum
Technical (Descriptive Topic Titles - Stay on Topic) => Lucas, Ignition, Charging, Electrical => Topic started by: oldvet on 07.02. 2017 00:52
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G'Day Guys,
About to fit a Headlight switch, 41SA with 54330576 top plate to my '62 SR switch panel. It seems to small for the mount hole which is the right size and shape for a U39.
Is there a plate or insert for the SR to enable fitment??
Ta,
Al
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Al,
I wasn't familiar with the part numbers, but on looking them up, I've been of the opinion that U39 is the right switch (that's what I have). I don't recall seeing the 41SA used in place of the U39, but others may say quite the opposite
Richard L.
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If you have the independent headlight (not the nacelle) you need the U39 switch which is the standard switch fitted to nearly everything, pre-nacelle, including Gold Stars. There was a special switch panel used on the RGS which has a smaller hole for the 41SA switch. I don't think the special switch panel was ever used as standard on the SR but others may know better.
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Thanks for that input. I think you may well be correct as the bike had the original switch panel and a damaged 41SA fitted by means not manufacturer approved. In the meantime I'll fit the U39 and we shall have light thanks to an Alton 12 volt conversion and a Lucas flamethrower.
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[quote oldvet fitted by means not manufacturer approved.
Quote of the day! *smile*
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41SA is correct for all, RGS & Super Rocket alike. U39 was last used in the panel about 1959.
Use the U39 or modify your panel to suit. Genuine panels are hard to find.