The BSA A7-A10 Forum

Technical (Descriptive Topic Titles - Stay on Topic) => Lucas, Ignition, Charging, Electrical => Topic started by: Nourish on 29.05. 2026 18:49

Title: MU42 Headlight fittings
Post by: Nourish on 29.05. 2026 18:49

I have an MU42 6" headlamp with the instrument panel. Is there supposed to be rubber beading under the panel and around the headlamp glass? Cheers

Title: Re: MU42 Headlight fittings
Post by: JulianS on 29.05. 2026 20:07

Below from Lucas shows the position of the beading on the MU42. Don't know about the panel.

Title: Re: MU42 Headlight fittings
Post by: Nourish on 29.05. 2026 22:20

Thank you for that Julian

Title: Re: MU42 Headlight fittings
Post by: Beeza on 29.05. 2026 23:01

I guess this is for the A7 LS with QD front wheel?

Title: Re: MU42 Headlight fittings
Post by: Nourish on 30.05. 2026 07:42

Will be - yes

Title: Re: MU42 Headlight fittings
Post by: Beeza on 30.05. 2026 13:57

Pretty sure it should be the 8” headlight, not sure of the number, mine is painted over so I can’t read it.
There was a LS headlight post a while back. Cheers 🍻

Title: Re: MU42 Headlight fittings
Post by: JulianS on 30.05. 2026 16:52

Lucas lists show MU142 for 1947 and 1948, which have 8 inch rims then SSU 700 pre focus type for 1949. The U means fitted with a switch panel.

Title: Re: MU42 Headlight fittings
Post by: Nourish on 31.05. 2026 09:10

"Pretty sure it should be the 8” headlight" - It should be but this is what I'm going to use. Cheers