I have a KX500 - Don't use anything less than an MX riding boot to try start. Lightly push down on your kick starter multiple times until you find the sweet spot. You'll be able to tell because your kick starter will be at its highest point. Jump your entire body into the air and come down with a kick. Don't waste your time trying to start without finding the sweet spot first.(top of stroke) - You may have to adjust your kick lever forward one notch to get "high" point on your lever. - Hope I helped - Good Luck