V-Twin Forum banner

Wiring ignition coil

20K views 14 replies 5 participants last post by  Moby Dick  
#1 ·
Good afternoon,

I have a 2012 ******* engineering rocket that I'm in the process of rewiring the ignition on and the wiring diagram shows a jumper wire but doesn't explain where it goes if anybody knows where to attached too I would really appreciate it?

Image
 
#9 ·
The jumper is just a continuation of the red wire. It carries system power from the +term of the left coil to the + term of the right coil.

Not sure what that's on, but its two dual fir coils firing independently. So it fire two, and then fires the other two at another point.

Could be a twin with dual plug heads. Or could be a 4 cylinder with single plugs per cylinder. Based on the text, its a dual plug twin. firing both plugs in the cylinder with no stagger or temp correction.
 
#6 ·
The diagram you show clearly states dual fire, dual plug. That means each cylinder has two spark plugs for a total of four, it will also require two coils. The diagram you post shows two coils, not one.
Perhaps this isn't the ignition system you think you have. Re-examine the instructions, there are other ways this system gets wired for using one coil and single plug cylinders.
 
#11 ·
Here is a couple pictures of my ignition coil. I have thecompufire ignition model number 21835 the engine is a S&S EVO 124" super sidewinder.

These are my choices besides the crane ignition
View attachment 274020
From what I see in the photos, single dual fire coil, single plug heads, figure 10 is how you would wire it.

The In figure 12, the Crain set up is just a generic single fire coil.

You prolly should consider determining what the required ohms are for coils used by that system, then odrer a single fire coil. Then Wire it like figure 12.

Also, its not mentioned, but with a 124, you'll want to be damn sure it has a working VOES on it.