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71
Douglas Motorcycles - General Discussion / Re: EW 350
« Last post by douglas1947 on 08 May 2019 at 12:20  »
Hello Manfred,

congratulation to your EW350; with Henry Body it had a very well known owner in the past.
I hope your bike is in good condition.
I´m working on a 1930 H3 350cc bike, a model that follows the EW.

Michael
72
Douglas Motorcycles - General Discussion / Re: CW Fork Spindles/EW
« Last post by Charlie18 on 08 May 2019 at 08:03  »
Eddie ,
            Thankyou for that information , I’ll search out a TIG /lathe operator and see what they can do .
                   Cheers  Doug
           
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Douglas Motorcycles - General Discussion / Re: CW Fork Spindles
« Last post by eddie on 08 May 2019 at 07:30  »
Hi Doug,
              As with all repairs of this type, the success rate depends upon the expertise of the person doing the welding, and their ability to control the temperatures within the parent metal. Having said that, if the damage is restricted to the threaded end that retains the timing pinion, the repair should prove reliable. I have seen damaged tapers on the DRIVE end of DT crankshafts built up with TIG weld and remachined to give further service in sprint engines (and you cant give a Douglas crankshaft much more grief than that!)

  Regards,
                 Eddie.
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Douglas Motorcycles - General Discussion / Re: CW Fork Spindles/EW crank
« Last post by Charlie18 on 08 May 2019 at 06:52  »
Hi Eddie,
                 Re your suggestion to Jeff ,would you use a TIG  to build up and rethread the timing end of an EW crankshaft.?  This is the end that drives the oil pump . My other option would be to turn down the damage and rethread to 9/16” and make up a new nut/ drive.  Cheers Doug
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Douglas Motorcycles - General Discussion / Re: Aero 600 Engine re-assembly
« Last post by Aero on 07 May 2019 at 16:37  »
After giving it some thought over the bank holiday I think this spring design will do the job.
I've just adapted an old spring from inside an oil filter & its not very tough so will need to be remade in a better material before I can use it.
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Douglas Motorcycles - General Discussion / Re: CW Fork Spindles
« Last post by eddie on 07 May 2019 at 15:25  »
Hi Jeff,
           Firstly, an observation! Quite a few prewar Douglas components seem to suffer from damaged threads due to the items being fully hardened. Now, threads are quite highly stressed anyway, and also suffer from stress concentrations at the roots of the threads, so the hardened threads often shatter and break away.
   Now, a suggestion! Assuming you only have the thread damage, if you can get the stripped thread area of the spindles built up with TIG weld, and re-machined, the spindles should then be stronger than they originally were because the weld heat would have tempered the spindle, making it tougher and less brittle.

Regards,
               Eddie
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Douglas Motorcycles - General Discussion / Re: CW Fork Spindles
« Last post by carl denton on 07 May 2019 at 13:58  »
hi search on eBay Australia and look for cjchris71 he is an amazing bloke and makes all sorts of parts for Douglas bikes .

hope this helps carl
78
Douglas Motorcycles - General Discussion / EW guides
« Last post by tck on 07 May 2019 at 07:33  »
Finally finally I have got a chance to look at the 26  EW. Years ago Eddie said 'look at your valve guides' but suffering from too many bikes the EW soldiered on with an occasional outing till it failed to get my wife up kop hill 2 years ago.
the guides are worn in fact it was the coke in the front  Inlet port that sapped the power completely! never seen anything like it. I can get new guides I suppose from the club but when it comes to recutting the seats do I send it away? or do it myself?  there used to be sources for individual grinding stones but now only expensive car sets and most of those are 45 degrees (I am not certain what the EW seat angle is -30?  I can turn up a suitable pilot to suit.
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Douglas Motorcycles - General Discussion / Re: CW Fork Spindles
« Last post by lovejoy on 06 May 2019 at 18:17  »
Hi, Many thanks for the sad news. Perhaps someone else has ideas or drawings so I can have them made.

Regards Martin
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Douglas Motorcycles - General Discussion / Re: CW Fork Spindles
« Last post by graeme on 06 May 2019 at 13:06  »
I'm sorry to report that the maker of these parts, Stephen Sellar, sadly passed away a couple of years ago  :(
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