this just happened to mine,couple backfires before it started but heard a rattle behind cover. i shut her down and need to investigate the damage. doesnt sound to bad on mine. WE SHALL SEE
2003 SUZUKI Z400 - +2 burgards 250r arms,front 450r revalves,gtthunder rear revalve and link,434 kit,hotcams,ferrea valves, dyna cdi,yoshi full system,flexx bars,powermadds,shamrock front,yellow label rear beadlocks,roll pegs,roll heel guards,400ex intake,450r tailight,190 fan switch,burgard swinger,rpm axle,250r rear caliper,anti-fade, kfx450 reverse thingy, it hauls and looks pretty too!!!
03 yamaha fz1 -*** rippin sport-tour bike