Anyone know what might be causing this.... '04 WR450 symptoms: At between 20-25 mph, seems to be a complete misfire or very bad stutter resulting in a jolt every 20 yards or so.... at higher speed it's OK. Jetting - OK with PJ/PS/PAJ: 48/1.5 turns/100, Needle/Clip: EMN/4, MJ/MAJ: 170/200, LJ: 40, Idle: 1800 rpm (approx). CDi output voltages - OK TPS - OK. Coil secondary winding - OK, unable to check primary winding as meter is not accurate enough. Plug - OK In the middle of checking all other wiring, connections, grounds etc - haven't found anything obvious yet. Any help out there.... Stonie.