Recently purchased a 2013 low hr rmz250 . Cleaned bike , set up suspension , rode bike about 5 minutes . While practicing turns , bike cut off and will not start back . Checked spark with plug against cylinder , sprayed either , no start. Adjusted valves , checked fuel pump , removed injector and has spray , still no start .Tore top end down, no piston / ring problems , adjusted valves on bench . Have some kind of electrical problem , maybe not enough spark ?