The BSA A7-A10 Forum

Technical (Descriptive Topic Titles - Stay on Topic) => Lucas, Ignition, Charging, Electrical => Topic started by: mike.loehr on 26.05. 2025 21:10

Title: Lucas rb 108 regulator
Post by: mike.loehr on 26.05. 2025 21:10

Is this not a 12 volt regulator?It was installed in my newly aquired A 10 which had a 6 volt battery.

Title: Re: Lucas rb 108 regulator
Post by: KiwiGF on 26.05. 2025 21:37

A quick google and the aftermarket has 6v rb108’s for sale, and that there were 6 and 12v versions of the rb108 made by lucas.
If the bulbs are 6v and its charging ok, you probably don’t have mismatched parts?

Title: Re: Lucas rb 108 regulator
Post by: berger on 26.05. 2025 22:44

that looks like it's off my mates tractor from the 1950's

Title: Re: Lucas rb 108 regulator
Post by: trevinoz on 27.05. 2025 04:51

The voltage should be stamped on the back. The part number and date should be there also.