Do as outdoorsman said, switch on the key switch, hit the run button, place finger on one of the compression releases and hit the start button. You should feel the compression release click. If it does do the same test to the other release. You can also pull the green wire off of the starter and do this test. This will stop the starter from turning over the engine and make it easier to feel the releases engauging. Replace the green wire on the starter and manually push the release down, hit the start button and if engine turns over and starts then suspect you have a compression release problem. However be sure you are getting power to the release when you hit the start button. If no power then you may have a problem in the handle bar controller circuit board or a loose/broken wire.