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Douglas 1913 Model P motorcycle

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Douglas 1915 3 Spd-Gearbox and Clutch

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Lat Fuller

2025-07-20, 02:39:50
I am pretty desperate for a rear cylinder for my veteran Douglas 1917 2 3/4hp "W" model.   I there is anyone who may have one of these that can be re-sleeved or know where I may find one I would be very pleased for the help.  I have a number of engine parts that I can exchange such as matching crankcases, conrods, crankshaft, flywheel etc. Any help appreciated.

Lat Fuller

2025-06-04, 05:57:00
Does anyone have the specifications for the oil inlet valve spring for early 2 3/4 engines - Part number 424.   I have tried to order one from the club spares but apparently Jeff Swan is indisposed at the moment.

skapoor

2025-05-19, 09:23:12
I am looking for a carburettor for veteran Douglas motorcycle engine-13651. Could you please help me with this?

Douglas EW

Started by patrickhowell, 23 Jul 2015 at 10:31

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patrickhowell

I spoke to a chap on the Banbury Run who had fitted an Amal carb in lieu of the drip-prone Brown & Barlow. I believe his bike was circa 1926. If anyone has the exact model of Amal, I'd appreciate it.

oily bloke

Hi Patrick,
I think that may have been me.
It is an AMAL 274.
When I get home I will put up all the details.
Andy

oily bloke

Hi Patrick,
I fitted an Amal as per the following link;

https://www.douglasmotorcycles.net/index.php?topic=3109.msg11732#msg11732

Go to reply #21.

You may need to make a thin sleeve to join the carb stub to the manifold and an air ram for the inlet side towards the head to warm the incoming air (the long inlet tract can cause the carb to freeze if the air isn't pre heated).
I fitted it with a bottom feed bowl. A bit tight around the mag pick ups but works fine.
I have done many miles with no carb issues.
Cheers
Andy.

patrickhowell

Thanks, Andy, much appreciated. Patrick