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dyna s problem, new system, no sparl

  • Thread starter Thread starter kennerth750
  • Start date Start date
K

kennerth750

Guest
So I installed a brand new dyna S in my gs750 78 a a while back, then i had some health problems for a couple of months so it sat
for a while, i finally finished it all up last week.
When i tried to start it tho, nothing. no spark on any plug.

I checked the coils resistance (3 ohms from a bandit) they are good,
power goes straight from kill switch to coils, and the to red dyna wires.
i have 12.1v at the coils, 10,5 when cranked, both coils, also 12 on the coil sides where the white and black dyna wires hooked up, however if i check the volts with the blue and white disconnected from coils i get 6v from the white wire and 4.5v from the blue wire, both dips to zero every second revolution if turning it manually so the boxes still works, simulating points.

the 6v and 4.5v seems odd?

HELP!
 
Last edited:
There is a basic ignition test in the manual. The negative side of the voil should go between 12v and abot 1v when you crank the engine. Don't disconnect it to do the test.
 
it drops considerable when cranked, what worries me is that if i disconnect the white and black cables from the dyna (one to each coil) they give me about 6 on one and 4 on the other, constant, when turning it by hand only to drop to zero once every full revolution
 
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