I recently bought a 2002 WR426 (less than a year ago). The bike has been running good, but last time I rode it, it would stall whenever I would pull in the clutch. Before this last ride, I had never had this problem. The bike was warmed up when this happened. After stalling the bike was very hard to start, but I think this may be due to the stalling. When I got the bike running again, it would idle just fine. Any ideas on why the bike would stall when I pull in the clutch?