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Douglas 1913 Model P motorcycle

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Douglas 1915 3 Spd-Gearbox and Clutch

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Dave

2025-01-07, 19:16:39
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Dave

2024-06-11, 21:02:05
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Dave

2024-06-08, 19:30:04
For Sale
xman has two very nice 1950's machines available - a green 1950 mk4 and black 1951 mk5 - both in good condition and running well.

Dave

2024-06-07, 03:13:36

Dave

2024-06-03, 09:23:05
For Sale
Duncan has just listed his green and cream 1957 Dragonfly for sale with spares and documents.

Dave

2024-06-02, 09:34:05
Parts avalable
alistair still has parts available - barrels, carburettor, castings - see all listings.


Dave

2024-06-01, 19:33:27

Dave

2024-05-28, 01:09:46
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I would like to have the Douglas EW600 crankshaft

Started by yoshimasa negishi, 16 Dec 2024 at 16:24

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yoshimasa negishi

I am looking for a Douglas ew600 crankshaft for my Douglas ew600.

My ew600 crankshaft has a loose press fit on the timing side crank web and is rattling around.
The tapered surface of the flywheel is also damaged.
I can't find a Japanese company that can repair Douglas crankshafts.

alan reid

Hi Yoshimasa,  I have had a T6 crankshaft rebuilt by Alpha Bearings -
info@alpha-bearings.com.

My T6 is a 1930 Douglas. It looks like the same as yours.

Regards Alan Reid

yoshimasa negishi

Hello, Alan.

Thanks for letting me know who can repair my Douglas crankshaft!

I found a repairer in Japan for the ew600 crankshaft.

I was also looking for a repairer for the Douglas d31 crankshaft.
I am contacting Alpha Bearings.

Thank you kindly.

Yoshimasa Negishi

Eric S

Yoshimasa
I had good luck having the journals on the crankshaft laser welded (cold weld, not heating the metal) and then machined.
The difficult is to find a repairer.
Mine has the parts for years ....

yoshimasa negishi

Hi Eric.

Thanks for your kind advice.

The Japanese repair shop I hired to repair my crankshaft was highly skilled.
He can correct the correct dimensions and axial centre using thermal spraying and grinding to make a perfect circle of the crank journal and crank centre.

If necessary, a new crank web can also be made.
We look forward to the finished product.

Thank you.