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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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What size spanner for tappets on a Douglas 600?

Started by summers1, 07 May 2017 at 22:12

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summers1

07 May 2017 at 22:12
hi can someone tell me what size spanner i need for the tappets on a 600,thanks ian

Doug

#1
08 May 2017 at 05:55
Which one?

A 600cc 4hp, OB, OC, 600EW, E/F28-29, DT6, T6/S6, F/G31-32, OW1, Wessex, Greyhound, 600Aero?

-Doug

summers1

#2
08 May 2017 at 14:55
hi douglas aero 600 thanks for the reply

Doug

#3
08 May 2017 at 21:42
Ian,

O.k., that I can answer. The 250/350/500/600cc Aero tappet adjuster has a 3/8 inch hex milled on it. The jam nut is 7/16 inch. Not sure why they did not just use the prevailing Whitworth wrench hex sizes, but they didn't.

-Doug

summers1

#4
09 May 2017 at 21:49
hi thanks i thought it was 1/4 whit.
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