classic motorcycle forum

Motorcycle Discussions => British Bikes => Topic started by: grantrm on November 24, 2014, 08:00:30 AM

Title: magneto numbers and letters
Post by: grantrm on November 24, 2014, 08:00:30 AM

Hi, I have a magneto and would like to know what it was made for, thanks.

 I think the letters  and numbers on the plate are something like Joseph Lucas Birmingham n10 454115 AO 136 and I think the letters

and numbers on case is DO   R650

Title: Re: magneto numbers and letters
Post by: cardan on November 24, 2014, 08:49:45 AM

The date is January 1936, but a photo would help with the ID.

Leon

Title: Re: magneto numbers and letters
Post by: 64hip on November 24, 2014, 07:49:43 PM

Probably not of direct help to you, but of general note, to quote Bacon:

"Magnetos had a set of standards from their early days when they were always mounted on a platform. This set the spindle height at 35mm (code letter M) or 45mm (code letter K) above the platform, along with other outline dimensions. Over the years, magneto performance went up and their size went down, but the spindle heights stayed the same."

Title: Re: magneto numbers and letters
Post by: R on November 24, 2014, 11:27:29 PM

The Lucas bible says Ajays and Matchies usd a whole series of AO maggies in the mid 30s,
and AJW used a DO.

But there should be more identifying letters/numbers ?
A photo would definitely help.

Title: Re: magneto numbers and letters
Post by: grantrm on November 25, 2014, 02:11:07 AM

thank you all