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Find, Fix, Restore, Ride - Douglas motorcycles
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Douglas 1927 EW 600cc SV engine for sale
by Travishall
[10 Jun 2025 at 20:58 ] -
Dragonfly wheels Free old and rusty
by ZEBB100
[25 May 2025 at 23:27 ] -
pancake generator for sale
by DSIM
[23 May 2025 at 19:15 ] -
EW Crankshaft
by Cliffy73
[16 May 2025 at 17:40 ] -
SW5 for sale
by roger h
[15 May 2025 at 09:52 ] -
douglas aero 600project bike for sale.
by Dave
[09 May 2025 at 18:40 ]
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Douglas Aero Clutch
by Dave
[11 May 2025 at 02:27 ] -
Parts wanted for mk 1v
by Sunbeam36
[08 May 2025 at 14:14 ] -
petrol tank cap
by roger h
[01 May 2025 at 13:24 ] -
Douglas S6 Gearbox
by cbranni
[29 Apr 2025 at 18:53 ] -
Plus 90 barrel wanted
by Andy H
[23 Apr 2025 at 20:57 ] -
Bike wanted - Douglas Dragonfly
by Roys rider
[20 Apr 2025 at 08:45 ] -
1930s heavyweight foot rests
by saluki42
[19 Apr 2025 at 10:37 ] -
Parts wanted
by Hutch
[03 Apr 2025 at 05:06 ] -
Douglas Aero 1936 - Mag drive gear
by Bruce Shadbolt
[25 Mar 2025 at 22:40 ] -
B&B 123-5 btm feed float bowl top
by Mike Catling
[02 Mar 2025 at 18:24 ]
Quick Comments
Lat Fuller
2025-06-04, 05:57:00Does 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, 09:23:12I am looking for a carburettor for veteran Douglas motorcycle engine-13651. Could you please help me with this?
Dave
2025-01-07, 19:16:39Forgotten your password?
Click the 'Log in' button in the main menu, then use the 'Forgot your password?' function to create a new one.
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In this case, use the 'Contact' option in the main menu to send us a message and we can issue a new password.
Click the 'Log in' button in the main menu, then use the 'Forgot your password?' function to create a new one.
The new password will be sent to your email address. If your email address has changed since your last login, that method won't work as the email will go to the old address in your profile.
In this case, use the 'Contact' option in the main menu to send us a message and we can issue a new password.
Dave
2024-06-11, 21:02:05Have you tried the new Drafts feature yet? I just lost a long message today and learned my lesson. It is a good idea to save a draft of any long post you are writing. You can then just keep writing and keep saving a draft, knowing you have a backup if there is a glitch. The draft is automatically deleted when you post the message.
Recent posts
#1
Douglas Books, Manuals and Advertising material / looking info for the 4-speed g...
Last post by ManfrerdSt - Yesterday at 20:26looking for spare parts list and manual for the 4-speed gearbox of my T6
Regards
Manfred
Regards
Manfred
#2
Douglas Motorcycles and Parts For Sale - Private / Re: Douglas Mark III Engine fo...
Last post by Travishall - 10 Jun 2025 at 20:58Thanks mate! Updated ad!
#3
General Douglas Discussion / Re: DT 5 settings
Last post by Doug - 10 Jun 2025 at 02:41I am not a tunner so I cannot offer useful carburetor advice, but you might want to mention what carburetors you have fitted. Douglas used several types over the years. AMAC and track Amal to name but two. Or it could have any other make & model carburetor fitted in the intervening years.
On the cinder track they originally ran a 50-50 mix of Pertol-Benzol mix. But the same engine as a road model ran happily on petrol, and in sprinting events they have run on petrol, methanol, and 10% nitro-methane (briefly!) It is a matter of having the right compression ratio, carburetor, timing, and ignition for the fuel you are using.
Douglas used the same cams (there were several) for cinder track racing as for the road models; though usually with a single carburetor on the road models.
With the anti-fouling pockets for the spark plugs, they tended to run a little more ignition advance than normal. My 1934 OW1 model (descendant of the DT) likes 40-35 degrees advance. If those pockets have been drilled out, the timing is going to be more in line with other marques on a given fuel.
There is no source for the original style head sealing rings that I know of. Myself and others have made them using the method shown in this post:
https://www.douglasmotorcycles.net/index.php?msg=31133
-Doug
On the cinder track they originally ran a 50-50 mix of Pertol-Benzol mix. But the same engine as a road model ran happily on petrol, and in sprinting events they have run on petrol, methanol, and 10% nitro-methane (briefly!) It is a matter of having the right compression ratio, carburetor, timing, and ignition for the fuel you are using.
Douglas used the same cams (there were several) for cinder track racing as for the road models; though usually with a single carburetor on the road models.
With the anti-fouling pockets for the spark plugs, they tended to run a little more ignition advance than normal. My 1934 OW1 model (descendant of the DT) likes 40-35 degrees advance. If those pockets have been drilled out, the timing is going to be more in line with other marques on a given fuel.
There is no source for the original style head sealing rings that I know of. Myself and others have made them using the method shown in this post:
https://www.douglasmotorcycles.net/index.php?msg=31133
-Doug
#4
General Douglas Discussion / Re: CW Brakes
Last post by Alan - 10 Jun 2025 at 01:53If of any help re your resto, attached is a copy of the invoice for new chain that I purchased for my CW. Renolds were very helpful and I always buy a couple of half-links " just in case".
#5
General Douglas Discussion / Re: CW Brakes
Last post by Justy - 09 Jun 2025 at 19:35Thankyou they are perfect.
#6
General Douglas Discussion / Re: CW Brakes
Last post by Doug - 09 Jun 2025 at 15:46These two posts might help.
Rear:
https://www.douglasmotorcycles.net/index.php?msg=20589
Front: Pics assembled further down in post.
https://www.douglasmotorcycles.net/index.php?msg=23550
-Doug
Rear:
https://www.douglasmotorcycles.net/index.php?msg=20589
Front: Pics assembled further down in post.
https://www.douglasmotorcycles.net/index.php?msg=23550
-Doug
#7
General Douglas Discussion / CW Brakes
Last post by Justy - 09 Jun 2025 at 10:42Hi I'm restoring a cw which I acquired in bits, would someone be able to please post some pictures of how the front and rear brake assembly's go together.
Cheers for the help.
Cheers for the help.
#8
Douglas Motorcycles and Parts For Sale - Private / Re: Douglas Mark III Engine fo...
Last post by Daren W Australia - 09 Jun 2025 at 06:09Hi Travishall
Its not a Mk 3 engine it is a 1927 EW 600cc SV engine
Regards Daren
Its not a Mk 3 engine it is a 1927 EW 600cc SV engine
Regards Daren
#9
Douglas Motorcycles and Parts For Sale - Private / Douglas 1927 EW 600cc SV engin...
Last post by Travishall - 09 Jun 2025 at 01:34Douglas 1927 EW 600cc SV engine for sale
Clearly old and in average condition, I am selling on behalf of my dad, a motorcycle collector that needs to offload some pieces unforuntately.
EH1538 is the engine number found on the unit.
Looking to seel for reasonable price, open to offers. $2000 AUD is the starting point.
Located in Melbourne Australia
Clearly old and in average condition, I am selling on behalf of my dad, a motorcycle collector that needs to offload some pieces unforuntately.
EH1538 is the engine number found on the unit.
Looking to seel for reasonable price, open to offers. $2000 AUD is the starting point.
Located in Melbourne Australia
#10
General Douglas Discussion / Re: Douglas MkV 1951 carburett...
Last post by Pallijen15 - 08 Jun 2025 at 10:24I've often thought of the ignition timing being out a bit. All the other points are yes. I'll take a look at this in the future. Thanks Ron