yfmwarrior38
Well-Known Member
so me and my buddy were tear n down his 400ex for bad valve seals and enyhow the guy he bought it from said it had a je 426 kit wich is 88mm but he lied its stock what iam try n to say is that a stock 400ex piston is 85mm but if u bore a warrior to 85mm its only a 366cc ?? just thought that was weird...... and i am refer n to the je 366cc piston for warrior