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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?

Mark IV models, final drive

Started by gpobantam, 16 Aug 2011 at 17:58

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gpobantam

Doug.
Do you know why some Mark IV models had the chain drive on the nearside and some on the offside?
Cheers Mick

Doug

Mick,

All Mark IVs (and all Mark series and Dragonfly) have the final drive on the left-hand side. I suspect you have seen a picture or image that was inadvertently reversed.

-Doug

gpobantam

  Thanks Doug.
I thought it very strange. I saw the photograph in Members Gallery  submitted by Dave in June 2009 from Australia of his Mark IV Sports.

Cheers Mick

Doug

Mick,

Yes, the image is reversed. Not much to go by except for an oblique view of the backwards "L" plate. I'll go and flip the image the correct way now. Oddly, all the Douglas experts that visit this site and no one else has commented on it!

Perhaps I should instead just caption it as the rare export model for driving on the right-hand side of the road?   :)

-Doug

graeme

Except that we drive on the left (actually the "right") side of the road in Australia! :wink:

gpobantam

Yes Doug.

When I  went back to look at the photograph the only clue I saw was the "L" plate at the rear was obviously a reverse picture

Cheers Mick

gpobantam

Thanks Doug.

I see you have now changed the drive side - very quick engineering solution. Cheers Mick