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One coil not firing on 96 or 97 katana engine

  • Thread starter Thread starter JOE91
  • Start date Start date
J

JOE91

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Hello everyone this is a little different than I normally would put out there but maybe someone can help me out. I have put a katana engine into a go kart over the last couple of weeks and everything was going great until yesterday. I have made my own wiring harness just the basics to make it run using the stock fuse block, ignitor, and coils. Day before yesterday I was testing things and it wouldn't start so I did a little looking and I had reversed the positive and negative on the ignitor. I swapped them back to the correct position and the bike fired right up I put everything away for the night and yesterday when I wanted to start it again so I could actually take it for a test ride it would only run on 2 cylinders, number 2&3 the other 2 cylinders are not firing at all and the coil is getting warm, the coil for 2&3 is cool to the touch and working fine. I swapped the signal wires on the coil and made sure it would fire and it did. I have used 2 ignitors swapped coils and tested the ohms on the coil and everything checked out good the ignitor I swapped into the engine was a good one that I pulled from a running bike. The only thing I haven't checked is the signal generator is it possible that it is only telling one coil to fire and not the other or a wire in it burned or is causing a constant ground which is making the coil get warm? Any help is appreciated. Btw I know my harness is properly wired up I pulled everything from the diagram and it's not my first one I've made , I will however go through it today to make sure nothing is grounding where it's not supposed to
 
Signal generator has been tested and passed with 167 ohms in a range of 135 to 200. The coil itself is a good and has constant power where it should I used an ignitor from a running bike after I thought that was the problem and it's doing the same thing coil gets hot and doesn't spark
 
hjfisk said:
Are the coils mounted properly
Click to expand...

They were not mounted properly no, originally they are directly bolted to the frame so I assumed they needed to be grounded so they were zip tied above the engine and I ran a ground wire and bolted it to the mounting point of the coil. it was grounded properly. The whole issue was in fact the signal generator even though it was giving a good reading I finally pulled one out of a spare engine and mounted into the go cart and it started firing right away. Now it runs great with no issue. I have to wrap the wiring and mount the coils and battery box up properly and we will be good to go. I did attempt to ride it yesterday but as soon as I started to let the clutch out my jackshaft bent so its back to the drawing board with that one! thanks anyways guys
 
What no pics of a Katana powered kart?:upset: Video of test ride?:encouragement:
 
Lol I can't put up a video of it riding since the jackshaft broke but I will try to put up a pic it's still pretty ugly right now.IMG_20170522_194954.jpgIMG_20170522_194954.jpg
 
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