Don't walk, RUN to your computer, get on EBAY, and BUY a CCP Stabilizer for your 400EX. It is AMAZING! We live on land that is NOT manicured. In fact, it is downright ROUGH. This CCP Stabilizer smooths it out like it is barely bumpy. I used to have to hang onto the bars with a death grip. Now, I can ride at the same or faster speeds while barely holding the bars. I am NOT kidding! I could go on, but you get the idea!