Author Topic: Cam swap?  (Read 2129 times)

Offline SixFingerJack

  • N. E. England
  • A's Good Friend
  • ***
  • Join Date: Apr 2011
  • Posts: 56
  • Karma: 0
  • °§ïX?ïÑg?®JÅ©K?°
Cam swap?
« on: 25.05. 2011 15:22 »
My cam is fairly shagged, and in need of either repair or replacement.
My question is, can I fit a cam from a later A7 or A10 in my '48 longstroke motor?
Obviously, the part numbers differ, but the bushes are the same diameter, so are they interchangeable?
The reason I ask is that the later cams seem to be much more easily available than the early ones, and I don't have a later cam to compare with mine.
Thanks chaps.
°§ïX?ïÑg?®JÅ©K?°

1948 A7 Rigid

Online trevinoz

  • Newcastle, N.S.W. Australia.
  • Wise & Enlightened
  • *
  • Join Date: Jul 2006
  • Posts: 3226
  • Karma: 71
Re: Cam swap?
« Reply #1 on: 25.05. 2011 21:35 »
Jack,
            The later cam is completely different and will not fit.
If you can't get another cam you will have to get yours built up and ground.
This seems to be a common fault with these cams.
I have several and only one is any good and it is one with the part number stamped into the end.
All of the others have no number.

  Trev.

Offline SixFingerJack

  • N. E. England
  • A's Good Friend
  • ***
  • Join Date: Apr 2011
  • Posts: 56
  • Karma: 0
  • °§ïX?ïÑg?®JÅ©K?°
Re: Cam swap?
« Reply #2 on: 25.05. 2011 21:53 »
Thanks Trev, it was worth a try. Looks like I'll have to bite the bullet and get it re-profiled if I can't find a good used one.
°§ïX?ïÑg?®JÅ©K?°

1948 A7 Rigid

Online trevinoz

  • Newcastle, N.S.W. Australia.
  • Wise & Enlightened
  • *
  • Join Date: Jul 2006
  • Posts: 3226
  • Karma: 71
Re: Cam swap?
« Reply #3 on: 25.05. 2011 21:59 »
Jack,
            The followers are usually buggered as well.
Might be a good idea to get everything nitrided.

  Trev.

Online Brian

  • Wise & Enlightened
  • *
  • Join Date: May 2007
  • Posts: 1820
  • Karma: 43
  • Mt Gambier, South Australia.
Re: Cam swap?
« Reply #4 on: 26.05. 2011 03:09 »
According to their website Draganfly have the cam and followers in stock. The followers are exchange.

The parts numbers are,  cam 67-695 and followers 67-1024

Offline SixFingerJack

  • N. E. England
  • A's Good Friend
  • ***
  • Join Date: Apr 2011
  • Posts: 56
  • Karma: 0
  • °§ïX?ïÑg?®JÅ©K?°
Re: Cam swap?
« Reply #5 on: 26.05. 2011 10:08 »
Cheers Brian, I just had a look on their website, £110 - ouch!
Oh well, better start saving.....
°§ïX?ïÑg?®JÅ©K?°

1948 A7 Rigid

Offline bikerjohndavies

  • John Davies, Bath, UK
  • Valued Contributor
  • ****
  • Join Date: Jun 2010
  • Posts: 286
  • Karma: 6
  • 1953 BSA A10 Super Flash
Re: Cam swap?
« Reply #6 on: 26.05. 2011 10:10 »
I have used Newman Cams to make a new 67-695 cam for my long stroke A7 and was really impressed with the quality. They also hardended the NOS cam followers I had to match the hardness of the new cam.

I would recommend that you speak directly to David at Newman Cams as they charged me a lot less than Draganfly charge for a exchange one though I had to wait a few weeks for it.

http://www.newman-cams.com/contact.html
1931 Ariel VB31, 1935 Triumph 5/3 project, 1946 Ariel Square 4, 1952 Norton Model 7, 1953 BSA A10 Super Flash, 1954 Ariel VH

Offline SixFingerJack

  • N. E. England
  • A's Good Friend
  • ***
  • Join Date: Apr 2011
  • Posts: 56
  • Karma: 0
  • °§ïX?ïÑg?®JÅ©K?°
Re: Cam swap?
« Reply #7 on: 26.05. 2011 13:18 »
Thanks for that John, I'll give them a try.
°§ïX?ïÑg?®JÅ©K?°

1948 A7 Rigid

Offline Beezageezauk

  • N.E. England
  • Resident Legend
  • *****
  • Join Date: Mar 2006
  • Posts: 669
  • Karma: 21
Re: Cam swap?
« Reply #8 on: 26.05. 2011 14:32 »
Sixfingerjack,

I know a local guy who can reprofile cams and cam-followers at a very reasonable price.  I pass the old ones to him at Scorton Autojumble and get them back a month later, again at Scorton.

Send me a PM if you think I can help.

I'm from Teesside.

Beezageezauk.

Offline SixFingerJack

  • N. E. England
  • A's Good Friend
  • ***
  • Join Date: Apr 2011
  • Posts: 56
  • Karma: 0
  • °§ïX?ïÑg?®JÅ©K?°
Re: Cam swap?
« Reply #9 on: 26.05. 2011 21:51 »
Nice one!
You have mail......
°§ïX?ïÑg?®JÅ©K?°

1948 A7 Rigid