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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

2025-06-04, 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?

Dave

2025-01-07, 19:16:39
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Dave

2024-06-11, 21:02:05
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Mk 4 gear change problem

Started by Ray Dodds, 10 Oct 2010 at 21:43

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Ray Dodds

Hi All,my question is the gear change on my Mk4 its dificult to find nutral and not as slick as my Mk 3 sports any sugestions anyone, Regards Ray Dodds

eddie

Ray,
        Problems selecting neutral can often be caused by the clutch not freeing comletely. This may be down to oil on the plate or a distorted plate or maybe a collapsed spring causing the plate to lift on a tilt.
       Oil on the plate can be overcome by blocking the drain hole in the bellhousing, pouring about a pint of petrol in through the inspection hole, then lift the clutch and operate the kick start about 20 times to spin the plate, then drain the petrol. Make sure you regrease the release bearing before replacing the inspection plate.
      A distorted plate or collapsed spring will, of course, require a strip down to remedy.
     If your Mk3 Sports and Mk4 have their original gearboxes, you will find the gearchange slicker on the Sports - this model had some detail changes to the selector mechanism which improved its operation.
                                 Regards,
                                        Eddie.

Ray Dodds

Thanks Eddie, i shoud have stated the clutch is fine and the bike runs very well but the gear change is sloppie and finding nutral is a mater of up and down on the lever till its found where as my mk 3 sports is a delight to use i am going to pull of the cover plate and check if i can find anything amiss, Regards Ray Dodds