Do I need supression wires?

If I have the 3 ohm Dyna S electronic ignition on the bike in Sig, do I need supression wires?

only if your getting static on your radio! :laugh:

Thats kinda what I figured. Just want to be sure ordering this stuff so I only order once....

I also prefer and run Dyna's solid wire core plug wires which come pre-fitted with non-resistor caps.

Where radio static actually is an issue, could try resistor spark plugs such as NGKB8RES where the R identifies it as a resistor type plug.

Good Fortune!

Some uninformed rider have used both resistor sparkplugs and supression sparkplug wires and wonder why they have weak spark. Never use both unless you love troubleshooting!

I spent hours trouble shooting my o2 sensor before I finally checked my plug wires (dyna solid core) I switched to supression style and everything worked mint!

Yes, if you have any "modern" electronics (micro processors and such) on the bike acting goofy, it could be that you need suppression wires. Even digital multimeters can get messed up by the wires.

Old electronics like most regulators and older electronic ignitions don't seem to be affected much if at all.

Got my new wires ready to go on and Im unsure which plug goes to which input on the coils?

Try this (your primary or small wires may not be the same color as I've listed):

Ignition Coil Primary And Secondary Wiring

Ignition coils on the 80’s Kz1000,Kz1100’s and Gpz1100’s are wired the same, that is as you sit on the bike, the LEFT ignition coil primary(small wires) are two wires, RED and BLACK. The secondary (or sparkplug wires) go to #1 and #4 sparkplugs.

The cylinders are numbered left to right as you sit on the seat; #1,#2,#3, and #4.

For the RIGHT ignition coil, the primary wires, again are two wires, RED and GREEN, with the secondary going to #2 and #3.

The RED wire gets it’s voltage from the run/stop switch on the right handlebar switch pod.

The BLACK and GREEN wires connect to the IC Igniter(if the bike has the Kawasaki supplied electronic ignition) it actually gives the coils their grounds to fire the sparkplugs.

Primary(small wires) side of the coils will read between 1.8 to 3.0 ohms.

Secondary(sparkplug wire ports)side of the coil will read between 10.4K to 15.6K ohms. These ports are wired together, so it makes no difference which is used, as long as the correct coil to sparkplug configuration is followed.

To stress the ignition coils, take a hair dryer, heat the coils and see if the ohm readings change from cold to hot . If they do, it’s time to buy new coils.

Keep in mind, the wiring is reversed for the 550’s 650‘s and 750‘s, that is the RIGHT coil primary will be two wires, RED and BLACK with the secondary(sparkplugs) going to #1 and #4.

The LEFT coils primary wiring would be again two wires, RED and GREEN, with the secondary(sparkplugs) going to #2 and #3.

These engines have what is known as a “Wasted Spark” that is, a sparkplug will fire during an exhaust stroke. It does no damage and many other motorcycle engines have this design.

calvin17d wrote:

Got my new wires ready to go on and Im unsure which plug goes to which input on the coils?

On 1976 KZ900, "red" wire is red/yellow.

Good Fortune!

thanks guys, I think I understood that, I guess I was concerned as to whether it mattered which of the spark plug wires say for the 1&4 cylinders coil plugged into the forward or rear input of the coil. I guess it doesnt matter?

MFolks wrote:

Secondary(sparkplug wire ports)side of the coil will read between 10.4K to 15.6K ohms. These ports are wired together, so it makes no difference which is used, as long as the correct coil to sparkplug configuration is followed.

This was what I was looking for