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Douglas 1913 Model P motorcycle

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Douglas 1915 3 Spd-Gearbox and Clutch

Quick Comments

Lat Fuller

2025-06-04, 05:57:00
Does 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, 09:23:12
I am looking for a carburettor for veteran Douglas motorcycle engine-13651. Could you please help me with this?

Dave

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

2024-06-11, 21:02:05
Have 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.

Plus series rev counters

Started by giz.neal, 06 Oct 2014 at 14:48

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giz.neal

Can anyone assist with information regarding Rev Counters for the Plus. Instrument spec. drive ratios etc. ? In addition how does the drive engage with the engine/magneto?

Steve Neal

Neville Heath

#1
Attached (I hope) is a photo I took today which may help. The drive ratio is one to one. Drive is obtained via an extended nut holding the mag pinion on. Since the drive is trying to undo the nut a special tab washer will have to be used. This locates in the extractor holes and fold up against the new nut. I have used this set up and know it works. The adaptor plate is an option. They were made for the club about 50 years ago. There is a problem with them as the drive sits too far in and the drive cable union fouls. You need to make a distance piece between the plate and the drive. It does ensure accurate alignement however.   Careful measuring is required to get the right amount of engagement between the drive and nut.  Hope this helps.   




Attachments converted to linked images - Dave, 07Feb2021

giz.neal

Dear Mr Heath,

Thank you for the time taken to photograph etc. Exactly the info required.

Yours,

Steve Neal
Norwich.