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| Listed in parts books | Not catalogued by year yet |
AUTO ADVANCE
An auto advance unit for the ignition system, per a bare catalog listing with no further detail on file.
PN · 54419167
This part number turns up in our records simply as an auto advance unit, with no further detail attached in the catalog entries we have. Auto advance units are ignition components that adjust spark timing mechanically as engine speed rises, tied into the magneto or distributor drive on British bikes of this era.
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