Does anyone know if a YZ 400 or YZ 426 CDI box will work on my 98 WR 400? I just replaced the stator to the tune of $180 and am still fouling plugs like crazy. I sure would like to try someones CDI box before I take another $200 gamble. THere are a couple of WZ's around but no WR's. I disconnected the blue wire...no change. Cleaned the carb, filter, checked everything that I could think of and took most of the suggestions posted here. Seriously considering going red! Any help is appreciated.