Author Topic: Throttle on 1930 350cc Douglas  (Read 329 times)

0 Members and 1 Guest are viewing this topic.

Offline douglas1947

  • Senior Member
  • ***
  • Join Date: Feb 2014
  • Posts: 271
  • Location: Germany
Throttle on 1930 350cc Douglas
« on: 25 Jul 2018 at 16:42 »
Im working on a 1930 Douglas H3 and trying to keep the original condition.
Unfortunately the air lever (bottum part), combined with the throttle body has a bad repair, because the wire fixing was damaged.

Has someone an idea for repair? Im afraid, there is no spare part available!

Michael

Offline Doug

  • Global Moderator
  • ****
  • Join Date: Mar 2004
  • Posts: 3383
  • Location: Pennsylvania, USA
Re: Throttle on 1930 350cc Douglas
« Reply #1 on: 26 Jul 2018 at 03:23 »
Michael,

I believe the combined twist-grip and lever control dates from 1935 onward. They are typical seen on the Aero models. Usually they break at the pinch clamp. The only repair is to build up the area with weld and re-shape it to the original contour. Unfortunately Douglas aluminum alloy has a very poor reputation for weld-ability.

-Doug

Offline Daren W Australia

  • Master Member
  • ****
  • Join Date: Apr 2005
  • Posts: 467
  • Location: Sydney Australia
Re: Throttle on 1930 350cc Douglas
« Reply #2 on: 26 Jul 2018 at 04:53 »
Hi I dont have one but this pic may help Daren
too many dougli not enough time!

Offline douglas1947

  • Senior Member
  • ***
  • Join Date: Feb 2014
  • Posts: 271
  • Location: Germany
Re: Throttle on 1930 350cc Douglas
« Reply #3 on: 28 Jul 2018 at 13:13 »
Hi Doug and Darren,

thanks for replies.
My throttle has also a break at the clamp.
I can see that on your picture, Darren.
Are the throttle body "B" a repair?

Michael