ok i just have to put this out there.i go to change my spark plug on my 400ex and i just noticed that its been running lean,,, FOR FOUR MONTHS.so i pull the top end and it looks really good.when i pulled my 250ex top end the piston looked like it was gonna take a sh*t anytime so i changed that.400ex is bulletproof!!!and yes i fixed the jetting im not that stupid lol
