2 Cylinders

if it started working when you moved wire, trim wires back about 1/4 inch. the wire ends corrode
plugs go bad. did you ever change the plugs?
check the gap.

 

Coils won't cause plugs to fail.
There is nothing at this time to indicate that your coils are failing.

 

Agreed.
Gonna try some new plugs... And I bought the XJCD years ago so we know what kind.

Will post the resistance values for posterity.

 

Plugs that are in the bike are DR8EA.
Local Canadian Tire didn't have any.
They had these - E3.36 (https://www.jpcycles.com/product/383-528/e3-spark-plugs-e3-36)

Hitting the Yammy dealer in the AM.
Will cut back the wires, reattach the caps with some grease sparingly applied!

ohm measurements as promised. Meter zero'd out prior to each reading.

- Wires 1 & 4 sparked to the head.

- ohm Secondary 1 & 4 with caps on approx 26
- ohm Secondary 2 & 3with caps on approx 34

- ohm Primary 1 & 4 looked to be approx 2
- ohm Primary 2 & 3 looked to be approx 4

Hard to tell on the analog MM but
- pickup looked to be just over 500

Any thoughts on this variance?

Interesting to me is the resistance on 2 & 3 was greater than 1 & 4 @ both the primary and secondary...
and, over the years, cylinder 1 has givin me some trouble...

Thanks for all your help - If the new plugs resolve the firing issue I will let you know.

 

Yeah - It wouldn't start... but it tried on cyl 1 so that's why I think plug too.

 

Update.
Thank for the discussion regarding coils.
I learned a lot... and would love an opinion re the different resistances I'm seeing.

New plugs were the ticket.
Everything firing now.
Excellent!

 

DR8EA are plugs used Iin Canada, down here in the US we use non resistor plugs. that is what the R stands for in the plug number.

 

So you use resistor caps instead of resistor plugs?