I have a 98 Wr400 and it all of a sudden started fouling plugs. At least 1 each time I ride. I have performed all the OHM tests outlined in the service manual to no avail. Everything checks good. Once the bike is ran it seems to have a miss while at a constant RPM. Once under acceleration it goes like it should until it fouls the plug. I have cleaned and checked the carb. I am thinking one of the charge coils in the stator is going bad but I hate to take the $180 chance. Any ideas, any known problems with this kind of thing. I am currently using lots of NGK plugs.