Just put my friends Aero engine together and wondering if somebody could tell me the tappet (valve) clearances. Thanks Bruce

This is on my Aero

Most models I can think of did have a return spring. On the ones where the cable is vertical a compression spring is fitted between the end of the cable adjuster and the knuckle of the operating lever. On ones like the S6 and derivatives where the cable is horizontal, an extension spring is fitted between a hole in the operating arm back to a hole through the rear wall of the primary chain case casting.

Picture of the S6 type return spring below.



-Doug

Hi I have a query regarding my Model Z clutch. The clutch disengages well, now I have a thinner friction plate fitted, but my issue is with the Cam operating arm not returning when the cable is slackened. I can't see or feel any groove in the can ramp surface so am wondering if there should be a return spring attached to the operating lever, there is a small hole through the lever. If there should be a spring has anybody got any details regarding its length, shape etc and also where it located in the primary chain case.

any help with this would be welcome.
Chris

Hi Guys
1926/7 platform mount EW 350 Gearboxes x 2
These are incomplete see photos.
$250 I can post worldwide at your cost.
Daren 0401 333 351

Lovely bike. Enjoy !

At future Douglas gatherings, you might keep an eye out to see 
if all 4hp's share that number ?
Would not be the first marque where similar happens ...

Many thanks EW Ron. I must confess to feeling somewhat sheepish as the auction sales images are those for my bike so it's slightly galling to find that I already had an image!

It seems slightly odd that the number should be stamped on a detachable piece-the engine base clamp- but unless anyone knows of another location for the frame number that is what they will get. Now all I need to do is learn how to take rubbings of the various numbers-what precisely is wrong with good photographs?

Always lusted after a 3.5/4 HP Douglas having ridden one around Tasmania on a rally so fulfillment of a dream if the DVLA manage to get the paperwork in order.

Thanks again

Shaun
Ealing
London

Engine no and frame number on another 1914 up for sale
https://handh.blob.core.windows.net/stock/20061692-67.jpg
https://handh.blob.core.windows.net/stock/20061692-43.jpg

All you need to do is figure out where that camera was pointing .... !

https://www.handh.co.uk/auction/lot/lot-223---1914-douglas-model-b/?lot=61263&sd=1
Hopethishelpsabit 

Having recently acquired a 1914 Douglas on a NOVA I have now summoned enough patience to do battle with the DVLA for an age related number. First hurdle is to find a frame number. Should be simple methinks but it's not a 2.75 HP but the rather rarer 500 cc 4 HP.

Anyone got a pre 1915 4 HP and knows where the frame number is perchance?

Shaun C
Ealing home of the comedies
London

Hi Doug and Darren

Doug - Thank you for the link to the drawings, I can manufacture if need be.

Darren -Thank you for the offer of the parts. Please send me a DM with how much you are looking for for those parts. I will also send the pictures to the bike owner so they can have a rummage around and make sure they don't have them.

Cheers
Frank