Author Topic: I bought Douglas in Japan. Please tell me about maintenance.  (Read 980 times)

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Offline yoshimasa negishi

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Hello

Nice to meet you.
My name is Yoshimasa Negishi.
I live in Japan.

I am a beginner for three years since I started riding motorcycles.
I bought Douglas model L - 3 350cc in Japan in October.
I have little experience with vintage motorcycle and Douglas.

The bike is running.
I think that the condition of the engine is good, but there are many white smoke
I plan to overhaul the cylinder.
The tire has reached the usage limit.
You need to replace the tire or rebuild the rim.


There is something I want to know about Douglas maintenance.



I think that it is necessary to replace the 25x3 tire with its limit of use.
Is a tire of 25 x 3 Beatted Edge available?


How many liters of oil is appropriate for oil sump?


Do you have oil or grease in the gearbox?
What is the proper amount of oil?


Where can I buy a flywheel extractor?


What kind of tools do I need to be aware of when removing the crankcase?


People riding Douglas in Japan are rare in Japan.
I am dependent on your abundant knowledge!

Offline Eric S

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Hello Yoshima and welcome on board.
I am not the best specialist but I think I can reply to some questions.

On my 1937 Aero the grease in the gear box is a phyloxtropic grease. Solid grease that becomes more liquid with heat.
It can be home made mixing oil and grease but I bought it locally off the shelf from a french company.

On the Aero I don't need a flywheel extractor as the nut is a selfextractor. You just unscrew the bolt and it takes off the flywheel.

Others will reply more in depth.
Eric

Offline yoshimasa negishi

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Eric Mr. Hello
Thank you for your answer!

Explanation about grease and flywheel extractor, it is very helpful.

The motorcycle runs again after the repair of the kickstart gear is over.

Thank you very much!
yoshimasa

Offline Bert

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Konichiwa Yoshi
On my 1930 T6 with the same oil tank bolted to the engine, I fill it to the bottom of the threads of the filler cap. 

Bert

Offline yoshimasa negishi

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Hello
Thanks for the reply!

I found a guide to add oil.

yoshimasa

Offline douglas1947

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Hello Yoshimasa,

your Douglas looks quite good!

I wonder it has beaded edge tyres, but I think it was possible to get the bike still with this tyres in 1930 (also with acethylene light or lever throttle).
At the moment I restore a 1930 L3 by myself.
It is possible to get a maintance book for the model from London Douglas Motorcyle club (membership?).

Are your shure your piston are worn (because your engine is smoking white)?
May be you should do a test with fresh oil (Monograde W50), if the bike has not run for long time.
For gearbox I would use something like a "Penrite", not a mixture of grease + oil using in the past.
Would you please let me know your Engine Number / Gearbox Number?

Michael


Offline Doug

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Beaded edge tyres were standard catalog specification on the lightweight models through 1932. Judging by the catalog illustrations the lightweight models kept the beaded edge tyres into 1935, but they are by then only described as "Best British Make" so it is a little vague on the specification. The heavyweight models started getting well base rims in 1930.

Some of the lightweights intended for the colonial markets had the well based rims in 1930 too. For example the 1930 L3 is specified with 25 x 3" tyres (a beaded edge size), but the slightly heavier H3 intended for export had "26 x 3 wired on tyres" for well base rims.

-Doug

Offline yoshimasa negishi

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Hello Michael

Sorry for the late reply.
Since I could not get the beaded edge tire of Douglas, I ordered a 20 x 1.60 rim.
I will exchange it for 20X3.00 Ensign tire.

The engine is not opened, but the piston may be worn out.
I am considering replacing piston and ring.

Engine number: en 2354
Gearbox number: eg / e 750

Thank you
Yoshimasa

Offline yoshimasa negishi

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Hello doug

Sorry for the late reply.
Since I could not get the beaded edge tire of Douglas, I ordered a 20 x 1.60 rim.
I will exchange it for 20X3.00 Ensign tire.

It seems that Douglas was adopting beaded edge tires late than other manufacturers.
Thanks to you I have studied.
Thank you

yoshimasa

Offline douglas1947

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Hi Yoshimasa,

my bike is the slightly heavier model, a 1930 H3.
Frame No: FA564
Engine No:ER812
The bike has still the original paint and wire rims for tyre 3.25-19 in front and 3.50-19 rear.
May be the lighter L3 have 3.25-19 front + rear or even only 3.00 tyres.
Iīm still working on the bike.
Feel free to ask for any question or photos.

Michael

Offline douglas1947

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Re: I bought Douglas in Japan. Please tell me about maintenance.
« Reply #10 on: 12 Feb 2019 at 17:34 »
Photo of a wheel

Offline douglas1947

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Re: I bought Douglas in Japan. Please tell me about maintenance.
« Reply #11 on: 12 Feb 2019 at 17:45 »
Your engine has a number for a 1929 350cc B29.
I think you will have a frame No Wf.....?

Michael

Offline yoshimasa negishi

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Re: I bought Douglas in Japan. Please tell me about maintenance.
« Reply #12 on: 13 Feb 2019 at 12:59 »
Hello Michael

Thank you for the pictures.
The frame number of Douglas is FA 1471.
I think that it is number of 1930 model H3 / L3.

Offline douglas1947

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Re: I bought Douglas in Japan. Please tell me about maintenance.
« Reply #13 on: 18 Feb 2019 at 17:55 »
Hi Yoshimasa,

yes, it is right. Thatīs a 1930 frame for L3/H3.
I find your bike in the Douglas club register; seems so it had a UK registration?
There are several bikes with EN .... stamped engines in the register.

Your bike looked a bit oldfashened, because it has the engine without dynamo.

Michael