2009 S40 was running now dead
 

was riding along, hit a bump, heard a backfire & the bike died.
tried to restart & had no power - lights, crank, horn, nothing.
tried a few minutes later & the light came on, bike started & ran for 10 seconds or so & then died. no power again. intermittently have power when turning the key. bike is stock, battery is good(when it has power it cranks just fine). any ideas?