Short... bad ground... and then a whole host of things past that as well.
Best thing to do is take off the plastics, and work on checking every connection, cleaning it and filling it with die-electric grease. If it is a connector problem you will find and fix... or if it is an obvious bad wire you'll see it in the process.
One KEY place to look is the wiring that runs over top of the intake tube (short rubber part). I found my wires there to be pinched between the tube and frame when I went over mine just to do the grease. Glad I found it because that would have spelled trouble in the future.
A project in progress...
...brought to a screeching halt (3/09)
Time for a new 450R!
'08 Monster Energy KFX450R (Black)
Jardine RT99 Exhaust
Procom ECU (fully programmable)
ProArmor Tether & Install Kit
ProArmor PowerGRIP System
ProArmor Dominator Bumper
ProArmor full skid protection
'99 Sport 400
Out of a time capsule...
Bone stock, new condition (6/08)