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Last bit of wiring for the mo.
Thanks for everybodies help on this topic, and I've searched all the posts and seen the info. there.
I'm about to make the insulated plate that mounts on the ammeter.
My ammeter is not standard but I hope will do for now.

Looking at the wiring diagram I can see the wiring connections, ignition bulb, resistor.
Can't see an earth for the bulb, so is the bulb mounting earthed?
Are there any other earth or wiring connections not shown?
Is the insulated plate simply to mount the bulb bracket, and resistor?
Are the ammeter terminals connected to anything other than Term. 6 and Batt. Negative and Horn?
I can't see any reference to the Resistance of the resitor, does anybody know this?

Many thanks

Thanks everybody for your help.
Still waiting for a replacement nylon stand-off.
But the photos are where I'm up to.
I'll mod. the bkt ends and cover with shrink insulation, but am waiting for a replacement nylon stand-off first.

Image orientation fixed - Dave, 15 July 2020
Douglas Motorcycles - General Discussion / Re: My Douglas
« Last post by cycarmark on Yesterday at 17:05 »
The AMAC carb float body on my 1920 Clyno looks similar to yours.  The float needle has no grooves, but is held in place by a clip and a spring over the needle.  The float level can be adjusted by moving the clip and spring.
Douglas Motorcycles and Parts For Sale - Private / Douglas 350 gearboxes
« Last post by nf79 on Yesterday at 12:54 »

I would like to sell my two Douglas 350 gearboxes.
Cost 600 EUR both + shipping.


Image orientation fixed - Dave, July 15 2020
The exhaust specialist isn't taking on any further work until September so I'm going with your suggestions, Eddie, with trimming the deformed collar and adjusting the bends with a suitable bar etc.
I will report back my progress.

I would like to sell my Douglas 350 Petrol tank. 
Cost 350 EUR + shipping

Hello Doug

Thanks for the precise advice
I will set the ignition timing of L-3 at 40 degrees BTDC.
Soon the engine will be back from the internal combustion store.

Douglas Racers and Racing History / Re: 1932 TT Douglas
« Last post by cardan on 13 Jul 2020 at 23:03  »
Here's the description of the 1932 TT Douglas from The Motor Cycle in May 1932:
"LAST week the first of the T.T. Douglases was to be seen down at Brooklands. C. T. Atkins, the well-known Douglas exponent, who is largely responsible for the "upbringing " of this model, was putting it through its paces over the half-mile for the first time.
... Special Druid forks are used...

In the photo above, it's not hard to imagine Tommy glancing enviously at the solid steering head and Druid ES fork on Bill Lacey's Norton and thinking "I could do worse that have a front end like that..." And, for 1932, he did.

I'm now convinced that any Douglas racer with a long steering head, Druid or Webb fork, and Sturmey Archer non-cross-over gearbox was born no earlier than 1932.

Atkins' 1931 track bike owes a lot to Judd's 1927 track bike, with the carburettors bolted directly to the inlet ports harking back to Dixon's 1928 2-cam TT bike, listed in the 1929 catalogue as the TT Model. It was the design for the 1932 racing bikes - Atkins at Brooklands, and a Works teams in the Senior TT - that had the real innovation. Clew's engine and frame number tables suggest bikes of this "1932 TT" pattern were built for special customers (like Babl in Germany, maybe Bejarano in Spain, Atkins and the Bury brothers at home) beyond 1932, perhaps as late as 1935.

Here's a photo - from the stilltime archive - of a race at Brooklands showing TWO of the 1932 TT bikes in action. Almost certainly the same event (Brooklands Senior GP, July 1932) shown in the Perryman photos above. Students of Brooklands might be interested in the track layout. The event used the short Mountain Circuit, in the clockwise direction, which involved a hairpin bend at The Fork, from the the exit of the Members' Banking onto the Finishing Straight. The Perryman photos are taken at The Fork: the first from the outside of the corner, the second from the inside. Look at the first photo, and in the distance, beyond the Vickers building but before the Members' Banking, you can see a barrel in the middle of the track.

In this photo, you can see that the race started on the outside of the track, ran alongside the Vickers shed, then did a U-turn around the barrel in the middle of the track onto the Mountain Circuit proper. The barrel is partly obscured behind the second Douglas rider. I haven't seen a barrel in the middle of a race track for a while.



I have not seen a handbook for the L3, but the ignition timing would be the same as the 1931 model A31 350cc side valve. The handbook for the A31 states full advance as 40 degrees BTDC.

The 1929-30 T6, S5, S6 handbook states full advance to be set at 34-37 degrees BTDC for the 500/600cc. They would have used the same setting in 1932.

1930 Douglas ignition timing questions


I am now restoring two Douglas.

1930 Model L-3 350cc
1931 Model D-31 600cc

I would like to know the proper angle for the ignition timing of 350 cc and 600 cc of magneto
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