Well I have had my first problem out of the xr600 I bought. It has worked fine and I was just riding one day and then I shut it off, then the next day, went to start it and nothing. I kicked for an hour. I figured I had ruined the spark plug, bought a new one, but nothing. Gets no spark at all. What should I try and check now? All yea, its a 1997 xr600.