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Also, any thoughts on the fact that I can get a very weak spark from the coil if I remove the boot and touch the wire to the block? Same result if I install the boot, insert a screwdriver and touch the screwdriver to the block. I get a very weak spark.

When I check the voltage at the primary plugs of the coil, with key on I have 12 volts. Is that what you mean? The voltage is pulsed when cranking the engine.

Hey guys, first thanks for the continued help. Second, my posts all still need admin approval before actually being posted which is a bummer, because my most recent post (a few up) was actually posted before all of your most recent suggestions. Let me know your thoughts on what I most recently posted. I did test the resistance on the original coil and it shows 2.9 on the primary side and 13.4 (without the cap) on the secondary side. Both of these number are below the info in Mech's PDF (thanks for adding that), however are they "below" enough to call out the coil as the problem? I did buy a replacement coil (cheap one off Amazon), and the primary side tested 4.2, with the secondary being 9.8 (without the cap). I'm thinkin the new coil is junk based off the very low secondary testing. All the tests done in the above post were with the original coil, for S&G's I'm going to repeat the same tests with the new coil, but I'm starting to wonder exactly what role the ignition unit and/or pulser play in the ignition equation? Do either one of them dictate the voltage going to the coil? I'm thinking I have too low of voltage going to the coil. That the only reason I can explain being able to create a spark jump without the boot installed as well as using a screwdriver to the block with the boot installed. I will be traveling today, and won't be able to look at the quad again until Saturday night but wanted to post this to hopefully get admin approval and have my post visible to you guys while I am gone. Thanks again for all the help, and for posting the PDF for this bike.

It's frustrating how little info is available isn't it? The coil I bought was listed for Kymco 250/270/300 ATV's. It looks almost identical to the original one. I did some more testing today. I followed every ground I could find and cleaned up the connection. I installed the original coil since the new one produced no improvement. I checked resistance on both plugs that I have, both read around 6.0 ohms. I pulled the spark plug boot from the original coil, and touched that close to the engine while cranking and actually saw a spark. I checked resistance on the spark plug boot, and see about 5 ohms. Installed the boot, and plug, no spark when touching to engine and cranking. I reduced the spark plug gap to .4mm and still see no spark. I placed a phillips head screwdriver in the coil boot, and will see a spark jump from the spark plug to the block while cranking. So I can verify that my coil is producing spark, however it will not produce spark across the gap of a spark plug. Where I'm torn now is do I possibly have 2 bad coils? Or is there another component to the ignition that generates the voltage to the coil? I have 12 volts constant to the power of the coil when the ignition is on, and I see pulsing voltage when cranking. I hate to buy another coil, or any other part just to throw stuff at the wall and see what sticks, but I'm really at a loss here. Thanks to all who continue to help me with this. I appreciate it.

I plan to check grounds today. You confused me a bit with the coil statement. Are you saying the MXU is 12v or CDI? I believe it is a 12v system.

I have "almost" the service manual. I can not locate a 270 service manual, but I have found the service manual for the 250/300 which seems to use much of the same parts. However, I would love to get a hold of a PDF for the actual 270 for peace of mind if nothing else.

The tester I have is not used in place of the coil, it is used in line with the coil. Below is a pic of the unit I have. You basically plug it in inline and it will flash (mirror the ignition signal) indicating the coil is functioning. When I do this, I get a pulsing signal on the tester, but I am never able to see an actual spark on the plug when touching it to the head. I will check the resistance again on the coil(s), old and new. Does anyone have a source specifically for the MXU 270? I found a workshop manual for the Mongoose 250/300 which is appears to be a very similar machine, and that's what I have been using to help me troubleshoot. The part that keeps bothering me as I continue to look into the ignition is the quad was running fine, was put away for the season and never ran again. That just seems more "fuel" than "ignition" in my experience, but I would think if it was a fuel issue I would at least be able to get it to sputter having drained the tank and carb and put in new gas. I get no sign of life out of it when trying to start, and no visible spark on the spark plug when touching to the head and cranking over. Thanks all for your continued help.

Thanks for all the suggestions guys. I am still fighting this thing. Had to take a couple weeks off due to both mine and the wife's car needing some attention. Back to the MXU. This is where I am to date. I have connected a 12v test light to the plugs for the coil, and I get a flashing light when cranking. This tells me that the ignition module, and pulser unit is functioning as intended. Just to be safe, I tested the resistance on the pulser unit and it falls within specs for the MXU 250/300. As mentioned above I'm working on a 270, and finding information on that model seems all but impossible but it seems that many of the parts for the 250/300 are the same for the 270. I bought a Lisle coil tester, and when connecting that inline and cranking the engine I get a pulse from that as well. This really threw me off, because I get zero visible spark when touching the plug to the block. I did buy a new coil, and installed that today and frustratingly I am in the same boat. No start, no visible spark on plug. I repeated both tests using the 12v test light on the coil plugs, and the Lisle coil tester and both produce a pulsing light when cranking. I actually have 2 brand new plugs, and neither plug produces a spark so I'm thinking that rules out a bad/faulty plug. I really don't want to start throwing parts at this thing, but I'm running out of options. Any suggestions, or thoughts would be greatly appreciated. Thanks,

The issue I am having with this one is not starting. The owner told me the gas is 5-6 months old. I also know it was not treated. I assumed clogged fuel lines or carburetor. I have drained the tank, and carb. I did pull the coil and bench test and was surprised how weak of a spark it produced, so even though I suspect a fuel issue I would love to verify the coil with some resistance readings, hence my reason for wanting a workshop manual. Alternatively if anyone here has had a reason to check their coil on a bench test, or just putting the plug against the head I would be curious what level of spark they see. I had to dim the lights in my garage to see the spark.

I am trying to find a workshop manual, and it seems that finding anything for Kymco is tough. I was hoping if I could find one for Kawasaki that would be close enough (assuming they are mechanically the same).

Hello all, I am working on a MXU 270 and having the hardest time finding information. I recently saw a youtube video that claims the MXU 270 is mechanically the same as the Bruteforce 300. Can anyone confirm?