1951 Royal Enfield Model S S672

[cruise98]

Hi everyone
Ive just purchased a 1951 Royal Enfield Model S 250cc
I got this bike without a magneto and was wondering does anyone know what mag it is suppose to have ? I ve been told a Lucas M01/6 but when i mounted it to engine the shaft sat too high to go into hole in crankcase.Did the lucas mag come out in different shaft heights?

[mini-me]

Probably it did not use a Lucas magneto.

Lucas M01/6  is a mag-dyno probably far to big fr the space available.

Have a word with Hitchcocks.

[cruise98]

Yeah they said lucas M01-6 which doesnt fit

[cardan]

There are two standard spindle heights: 35mm and 45mm. Presumably your bike uses the lower one.

Leon

[cruise98]

Thanks leon so what should i be looking for in part number etc

[cruise98]

Yes spot on 35mm is what i need

[iansoady]

As mini-me suggested, Allan Hitchcock is your man.

[cruise98]

Yeah i emailed alan he doesnt know alot about the 250cc model s unfortunely

[mini-me]

It might well have been a different make of magneto, or  probably one of those combined dynamo/contact breaker affairs. Could be Miller as well as Lucas.

This was a bike built down to a price in a time of real austerity, not the soft version they moan about these days. Likely to be using up pre war stocks of the above unit.

Sounds like Hitchcocks have fobbed you off with  a standard response.Unlike them.

First thing for you is to get a parts book for that exact year and do some swatting up.
I can't find a pic of one.

Are you in UK?

 edit
You can just about make out the unit here.
http://1.bp.blogspot.com/-8EfSqMLXCjk/UEDG2w7ir8I/AAAAAAAARdI/2xHIFkMxFBw/s1600/Model_S.jpg

you can see the cradle the dynamo sits in here

http://www.pdrestoration.ca/PhotoAlbums/album_1400262565/

[chaterlea25]

Hi Cruise,
Some googling shows up a few pics of such a model
From one of them it looks like the base for the "mag or dynamo? is semicircular ?
http://www.pdrestoration.ca/PhotoAlbums/album_1400262565/
This would tend to indicate that mini-me is on the right track
I cannot identify the unit fitted in the attached photo,
Another photo in google images shows a mag dynamo fitted to a 250 ? (it says 1951)
https://www.flickr.com/photos/michel_67/2813353615/

Good luck with it
John

[mini-me]

better one here

http://www.pdrestoration.ca/PhotoAlbums/album_1400262565/

[chaterlea25]

Hi mini-me
I had included that link in my earlier reply

John

[mini-me]

that'll teach me to read all t he posts

[R]

Is this the unit we are talking about ?
This is a Lucas E3HB
I thought they were only prewar ?

Prewar, if you bought a standard model RE, this is what you got for ignition and lighting.
All 30  ? watts of it !
If you bought the Deluxe Model, you got a magdyno, and tubular forks...



btw, these things spin at engine speed.
Finding the gear to drive it can be tricky too ?

btw2, I'm not sure of the function of that clamp, or where/how it should be fitted.

[33d6]

A mate and I started off our riding careers with me on a WD M20 and him on a pre war RE 350 with one of those dynamo with points on the end things. I'll swear Royal Enfield fitted a special pump to push oil out of the timing gears and through the bleeding thing. It positively dripped oil out of the points box and keeping the points working was a battle. I've suffered a severe lack of enthusiasm for both Royal Enfield and that style of coil ignition ever since.
Of course both bikes worked under the serious handicap of being owned by gormless teenagers but the M20 was more gormless proof than the RE.