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31
I have a Douglas CW frame (CF8508) forks, handlebars, front & rear wheel hubs, seat assembly and fuel tank. "For swap or sale" Frame has had a very early repair on the rear right axle lug, 3 out of the 4 fork spindles missing, the fuel tank has damaged oil / fuel and oil pump interfaces. Generally the frame and forks look straight with very little rust, the seat pan has surface rust/pitting but is very solid. l would like to swap it for parts I need for my Douglas TS (1924 ish) Iím after engine/parts. I will sell but prefer to swap for parts I need.

 Parts needed:


Gearbox belt pulley and nut.

Gearbox sprocket and nut.

Flywheel sprocket and flywheel nut.

Carburetor.

Inlet manifold and exhaust manifold nuts

Pistons and conrods.

Valves and springs.

Oil and fuel caps


Update 30 Sep 2022:

Have swapped everything but frame and fuel tank for the parts I need (less one oil cap) thanks for reading 👍
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I concur with the last comment. If the slide is at all sloppy in the bore of the carburettor you will never get any sense out of it
33
The jet for my LUCAS NO. 344 ACETYLENE Rear Light is broken. Does anyone have one or know of a source?
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Douglas Motorcycles - General Discussion / Re: Douglas V 4
« Last post by EW-Ron on 28 Sep 2022 at 22:04  »
and "the man" in the motor house to oil things before every outing and this would work.

This lubrication 'feature' persisted long long long after 1907 though. !

Engines with inlet-over-exhaust layouts (ioe) etc had exposed valve gear until it mostly died out in the late 1920s.
So needed some manual lube along the way.
And many a sidevalve had open air valve gear, with mere covers, until after WW2 in some cases.
WW2 army Norton 16H's had grease nipples on the valve guides, to assist in this dept.
Manx Nortons had valve springs out in the fresh air until the early 1960s. (and never redesigned).
But had a 'deliberate oil leak' to keep the guides lubricated.

Royal Enfield claimed at some point that their 1936 models were the 1st to featured full enclosed valve gear,
to permit a fully lubricated design of valve gear. There were earlier (unsuccessful ?) attempts at this ?

We diverge ...
35
Douglas Motorcycle Technical Articles / Which screws do I need?
« Last post by Domas on 28 Sep 2022 at 17:15  »
Which screws do I need? (see picture)Motorcycle is a 2 3/4 HP.
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Hi Michael
                 Hope the photo helps, this is my mk v. phil.


[Reformat image.  28Sep22, Doug, admin]
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Douglas Motorcycles - General Discussion / Re: Douglas Aero 1937
« Last post by Eric S on 28 Sep 2022 at 12:47  »
Back in business !
I finally received the parts. He did cut 2 in a piece of metal I sent and 2 more.
He left the tabs longer and uncut so I can cut them.
I have 2 made in stainless .074"/1,88mm and 2 in galvanised steel .059"/1.5mm thick. Not sure which ones i will use.

Now I need to make sure how to make it tight.
I cut a wrench to fit nicely over the hex head. Question is how can I tell if the bolts are tight enough? Is it good if I tighten the bolts as good as I can and bend the taps.
Is there any way to make the bolts tighter?
Use Loctite? Although this will not make nothing on torque and tabs are here anyway to hold the bolt...

Any advise is welcome before I jump back in there.
38
Hi all,

I still have the hope to get informations about the timing gears of the plus models.
I want to to start re-assamlbe the engine in the next days and would like to knowwhat parts to fit to the crankcase (and what bushes to make).

I will be happy for every information.

Michael
39
Douglas Motorcycles - General Discussion / Re: 1030's kickstart spring
« Last post by saluki42 on 28 Sep 2022 at 08:06  »
Thanks for the information Steve you have answered a couple of my questions there which will make my life easier. I'll have to turn up a replacement spring bearing which shouldn't cause a problem.
The only big issue I've had with this gearbox is my jigsaw of a Model Z came with three fully dismantled and differently shaped gearboxes with a random assortment of shafts and gears. At the moment I seem to have a functioning 4 speed gearbox with rack and pinion selector and now hopefully, with half hours machining, working kickstart. Get this one sorted and I'll have to loom at what the other ones are.

Thanks again
Chris
40
Douglas Motorcycles - General Discussion / Re: Douglas V 4
« Last post by cardan on 28 Sep 2022 at 01:56  »
In the original description of the v four (Motor Cycle, 27 November 1907) the valve gear is described as follows:

"...the inlet valves are automatic, while the exhaust valves are worked by outside tappets on the Daimler principle."

In a 1907 Daimler car - choice of the King and others, large and lovely but a little primitive - the camshaft ran in the open air with cam followers with adjustable tappets operating the valves, see first photo. A low revving revving engine and "the man" in the motor house to oil things before every outing and this would work.

Apparently the Douglas V four was similar - see photos - but there were no adjustable tappets. This was pretty typical of motorcycles of the era. Adjusting the valve clearance was done with a file - very fiddly inside the V of the cylinders. And as the motor would be quite high speed, like the contemporary 4-cylinder FN, I'm not sure that the lubrication would be up to the task. Still, the survivor made it to Brighton a few times.

Leon
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