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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?

Dragonfly of despair final fitting

Started by AndyMorgan, 29 Dec 2021 at 11:43

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AndyMorgan

So far so good but a little help needed to how and where to install the electrical parts.
First, how do the ameter and switch secure to the nacelle
Next, where do the coil, rectifier and horn attach, I need to make the lower tank bracket can someone please post a photo with the details

Thanks

eddie

Hi Andy, 
              Firstly, the ammeter and ignition/lighting switch should be fitted with a rubber sleeve so that they are a push fit in the headlamp fairing. These sleeves are not listed in the spare parts book. I made mine by cutting about 5/8" from the top and bottom of an old fork gaiter. The sleeves are just 5/8" of tube with an outer lip around the top (so that they dont push right through into the fairing).
    The coil is suspended below the lower frame top tube - there is a shaped rubber block between it and the frame tube, and then retained by a steel strap. The rectifier was bolted to the vertical bracket under the front of the same frame tube (most owners have changed from the inefficient old rectifier to a modern solid state unit). The tank bracket you mentioned also provided the mounting for the horn. On my Dragonfly, I have re-made the tank bracket, in aluminium, to more generous dimensions so that it doubles as a heat sink and mounting for the solid state rectifier, as well as being the mount for the horn.

  Hope this helps,
                           Regards,
                                         Eddie.

eddie

Andy,
         I have just noticed something else on your bike - the hole in the toolbox doesn't appear to line up with the carburretor. You may find that your toolbox was intended to fit the pre-production models (the Dart). During early testing, it was found that there was not enough space available to get at the carburretor main jet, so the production machines had the gearbox casing modified so that the carb was mounted higher. When we were involved with the LDMCC spares scheme, there were 2 toolboxes in stock that had had a false steel plate fitted to the front of the box - presumably, so that the optional air filter could still be fitted when used on the production machines.

    Regards,
                 Eddie.

AndyMorgan

Many thanks Eddie, just what I needed

AndyMorgan

Happy to report it all works pretty well and has been out for a short 5 mile run.

patrickwhitty

Congratulations! I hope it runs as well as it looks.

Roys rider

Well done. Time and effort (lots of both) well spent.
Peter