We just bought my son a used 2002 KLX300R today. The bike ran fine as we tested it. After we got home he rode it for about 15 miles and the bike started to cut off when clutch was pulled during stopping. Seems like it ran fine as long as the throttle was active. The last time it happened it wouldn't crank for about an hour. I was able to get home but like I said once the clutch is pulled in bike stops running. Any thoughts would be helpful.