I know [@#$%&!] about the topic! What to buy and why? I have a 2001 YZ426, my first. I´m 185cm high. I use the bike for stunting practice and for fun at the farm. I have bend 2 within a month now and bought some used from a friend. Is it worth the money for me to buy renthal for instance? What is the difference between them, cuz there sure is some money to save..