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Coils

  • Thread starter Thread starter wership
  • Start date Start date
W

wership

Guest
Hi
I've got a 1978 GS750 that doesn't start. Drove it to the hardware store and went to leave and nothing.
Lights all work. 12.77 at battery but no spark when i test the plugs.

Ive got 12.08 at the orange/white wire to the coils
Ive got 4.1 and 4.3 ohms between the orange/white and white and orange/white and black wires for the coils
Ive got 28k ohms between 2/3 plugs and 111k between 1/4 plugs

I think 111k is bad, but what does it mean? One of the plugs wires is bad?
I've read elsewhere that a short could affect it. Is this a short anywhere or just between these wires?

took apart the#1 cap and i found t a tiny spring, little rod, and the screw-in cap portion
the "rod" is not a conductor (infinite ohms?) even after sanding the ends... does this make sense?
as you can see its got black and white substance on opposite sides of the cylinder



I measured the ohms from #1 inside the wire (no cap) to the cap on #4 and got 20.5k...
so it must be the cap... specifically that rod?

without the innards for #1 cap i can fish around with a copper wire and find spots inside the cap that will have less resistance, but it mostly stays at "1." so that cap must be dead... is this correct?
 
Last edited:
That little rod is a resistor. Most people just replace the cap assembly, others replace it with either a piece of brass or copper rod. Those resistor rods go out with age. I say a new set of caps, cut back the wires 1/4", and you are back on the road. Or if you feel like going back to the hardware store, get some brass rod
 
thanks!
1 new cap solved that problem... now ill replace them all... appreciate the help 60ratrod!
 
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