New Coil?

Working on the KZ200. I pulled the plug and grounded it against the head. Sometimes I can see a spark and other times there's nothing. I tested the resistance of primary winding and it reads somewhere around 3.00 to 3.10. The spec in my book is 3.5 to 5.0 ohms. It looks like it doesn't have enough resistance. Should I replace it?

No. You are close enough IMHO.
I would look to your points and condenser instead, and check the wiring for things like a poor quality ground.

If it looks old and crusty, I would get a new one. Unfortunately, a good one won't be cheap for your bike. Emgo makes a nice dual-output one for cheap, but your bike needs a single-output coil. I'd stay away from the ones that look like a big silver bottle. I've had problems with those in the past.

I would try to get a 5-ohm, single-output, full-size Dyna coil. But they might be a bit bulky.

I wonder if Kawasaki still has a coil for your bike?

Coil part number is 21121-093. Still active. $109 at partzilla.
That's a No-brainer. It's the best option by far.

www.partzilla.com/parts/detail/kawasaki/KP-21121-093.html

loudhvx wrote: Coil part number is 21121-093. Still active. $109 at partzilla.
That's a No-brainer. It's the best option by far.

www.partzilla.com/parts/detail/kawasaki/KP-21121-093.html

Amazing how many parts are still available from Kawasaki. That particular 093 coil was last used on a 1982 KZ305.

Think this coil would work? I can find a way to mount it if it doesn't fit.


www.mikesxs.net/product/17-6805.html

Spectre1982 wrote: Think this coil would work? I can find a way to mount it if it doesn't fit.


www.mikesxs.net/product/17-6805.html

That should work. Plug cap and wires will cost extra. I recommend using resistor wire with plain-rubber caps (as found on more modern car wires). The resistor caps seem to be more problematic.

With that type of coil, it's important to make sure the plug wire electrode is actually contacting the spike electrode in the coil. It will work for a while without it contacting, but then there is an arc in the connection, and eventually they fail there.

Also, if you can, mount it to something steel with both mounting bolts. That way the magnet field is complete and the spark will have as much energy as possible.

GPz550D1 wrote:

loudhvx wrote: Coil part number is 21121-093. Still active. $109 at partzilla.
That's a No-brainer. It's the best option by far.

www.partzilla.com/parts/detail/kawasaki/KP-21121-093.html

Amazing how many parts are still available from Kawasaki. That particular 093 coil was last used on a 1982 KZ305.

Yes, I've been pleasantly surprised a few times this year with parts I thought were long since gone.

This is my first bike with points. What all do I need to check to make sure I've got it set up right? I set the points gap and everything looks good to me. The ground is clean and tight. Im pretty sure evrything is functioning correctly but the spark is still intermittent. I pushed the spark plug lead into the coil to make sure it was snug. After that I had a noticeably brighter and consistent spark. I put the plug back in and it fired on the second kick. After I shut it off, wouldnt start again. Pulled the plug and no spark. I'm thinking it must be this coil unless the points are set wrong. Any tips? I've got time and my trusty snap-on multimeter. Where should I look?

Did you ohm out the plug cap to ground? If it is infinite, the coil, or more likely the plug cap is bad. If you can remove the plug wire (some coils can't have the wire removed) you can probably just replace the wire and cap.

I admit to being puzzled about this thread. Why is the coil being targeted as the issue behind an intermittent spark? I honestly don't know and a good explanation would help in my understanding.
AFA removing the spark plug wire, some are epoxied in and you can (usually) dig the epoxy out and remove the wire.
The first thing I would do is cut off about an inch of the spark plug wire and screw the cap back on. The end where the cap screws into will corrode over time. Cutting off just a bit will give you nice shiny copper again.

koolaid_kid wrote: I admit to being puzzled about this thread. Why is the coil being targeted as the issue behind an intermittent spark? I honestly don't know and a good explanation would help in my understanding.
AFA removing the spark plug wire, some are epoxied in and you can (usually) dig the epoxy out and remove the wire.
The first thing I would do is cut off about an inch of the spark plug wire and screw the cap back on. The end where the cap screws into will corrode over time. Cutting off just a bit will give you nice shiny copper again.

The primary resistance was measured at around 3 ohms. It should be closer to 4.2 ohms. This can be one indicator of a coil starting to go bad.
Also, when he played with the plug lead, the sprak got better temporarily.

And yes, the spike inside the cap tends to corrode from arcing over time, but it can also corrode the same way at the coil end.

For $30, it may not be a bad idea to just get a new coil.

New points and condenser are not a bad idea either, if the budget allows.

Here's a manual, in case you want to print out certain sections etc.
home.comcast.net/~loudgpz/Kz200fsm.pdf