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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?

compression data

Started by tck, 06 Jul 2015 at 10:22

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tck

06 Jul 2015 at 10:22
Anyone got a figure for a reasonable compression test pressure on a T35?
I am looking for a reason for power loss I am sure it was better than this :=)
I have checked tappets ,ignition,(yes I have the correct CB) plugs,leads, carbs etc I am loath to strip without some indication. the engine seems unstressed without smoke.
I have a tester but never used it much certainly not on a cylinder as small as 175
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