Author Topic: Is this a Dyna S ignition?  (Read 1530 times)

0 Members and 4 Guests are viewing this topic.

Offline david 750f

  • Expert
  • ****
  • Posts: 827
  • 1976 CB750F
Is this a Dyna S ignition?
« on: November 16, 2009, 01:34:48 pm »
This was installed by the previous owner. Is it a Dyna S ignition covered in black Goop? Or something else? The timing is off on 2-3 cylinders and I need to adjust it.

Thx
1976 CB 750F

Offline 75750SS

  • Enthusiast
  • **
  • Posts: 166
  • 75 750F, 2010 Concours ABS
Re: Is this a Dyna S ignition?
« Reply #1 on: November 16, 2009, 01:42:08 pm »
Doesn't look like my Dyna S or Dyna III??

Offline bwaller

  • Really Old Timer ...
  • *******
  • Posts: 7,484
Re: Is this a Dyna S ignition?
« Reply #2 on: November 16, 2009, 02:33:39 pm »
That might be a Prestolite.

Offline kos

  • Hot Shot
  • ***
  • Posts: 718
    • m3racing.com
Re: Is this a Dyna S ignition?
« Reply #3 on: November 16, 2009, 02:55:44 pm »
Not Dyna


KOS
220...221, whatever it takes.

Offline Jim F

  • Need a bigger house for more toys
  • Master
  • *****
  • Posts: 1,887
  • go baby go
Re: Is this a Dyna S ignition?
« Reply #4 on: November 16, 2009, 03:40:29 pm »
an old Martek maby
2002 RC51 1000 (SP2)
1983 GS1100EC Suzuki
2002 998 Dukati (Customers Bike)
1992 KTM500 2 stroke
1975 CB750/836 Honda
1978 GS750/840 Suzuki

Offline Terry in Australia

  • Really Old Timer ...
  • *******
  • Posts: 33,281
  • So, what do ya wanna talk about today?
Re: Is this a Dyna S ignition?
« Reply #5 on: November 16, 2009, 04:32:21 pm »
And the winner is......... B.Waller. It's an old Prestolite. I bought a bunch of NOS Prestolite ignitions from a guy in Oregon who used to have a shop, he warned me that they were pretty crappy and he wasn't wrong, but if yours is still working, that's a bonus, as they were certainly at the "lower scale" of quality electronic ignitions.

From memory, you need to be mindful of the air gap between the rotor and the pickup, Prestolite used to supply a thin plastic "feeler gauge" (and they stressed that you musn't use anything metal) to set the gap. Cheers, Terry. ;D
I was feeling sorry for myself because I couldn't afford new bike boots, until I met a man with no legs.

So I said, "Hey mate, you haven't got any bike boots you don't need, do you?"

"Crazy is a very misunderstood term, it's a fine line that some of us can lean over and still keep our balance" (thanks RB550Four)

Offline david 750f

  • Expert
  • ****
  • Posts: 827
  • 1976 CB750F
Re: Is this a Dyna S ignition?
« Reply #6 on: November 16, 2009, 04:40:15 pm »
Thanks for the info everyone.
It has worked fine for the ten years that I have owned the bike. 1-4 Cylinder timing is perfect but the 2-3 cylinder timing is slightly retarded. It might be time to get a Dyna S if I cannot adjust the 2-3 cylinder timing.
Cheers,
David
1976 CB 750F