Missouri_2004_400ex 10 Posted October 14, 2012 Hello, I have a 400ex with just a few add ons pipe, filter nothing done to the motor. I want faster how do i do this? Will i blow it up? Same qeustion for my buds z400 PLEASE help us. Share this post Link to post Share on other sites Like what you are reading? Please help us by sharing this content.