The Marston Sunbeam Club & Register Forum

General Category => Technical Discussion Forum => Topic started by: oggers on July 23, 2023, 02:24:44 PM

Title: Headlamps ect
Post by: oggers on July 23, 2023, 02:24:44 PM
Couple of hopefully quick Qs please ref 1931 model 9

Lamp

Main Headlamp has blown. Looks to be a Lucas 168 bulb which a few folk sell. However Dragonfly have what seems to be a 6V LED alternative (170 LED) with what seems to be the correct fitting. Are these any good?   

Carb

I have a 29/001 M90 carb but fitted with a 140 main jet. Seems I need a 160 - is this right? Needle jet measures around .106 inch - which seems correct. What about the needle itself. What should this be please?

Many thanks
Title: Re: Headlamps ect
Post by: phutton on August 03, 2023, 08:54:44 PM
If the carb is 1 3/32" choke, 160 jet is correct. Also 0.106 needle jet, although I'm not certain of that. It should be stamped 29/076.

P.
Title: Re: Headlamps ect
Post by: singleminded on August 07, 2023, 11:53:28 AM
Hi Oggers.
Check out Paul Goff,http://www.norbsa02.freeuk.com/.
I've used him quite a bit.