Ok so i just picked up a 2006 yz450f im so excited. I got a 05 yz250f now and I got the 450 so I can race the 125 and 250 amatuer classes and soon hopefully expert. but I got a few questions how did you guys break in ur new 450s, how should I break it in? Also is there anything I should know about the 06 yz450f? I didnt even start it yet tomorrow im going to drain the 87 gas and put in 93 and drain the coolant and put in engine ice but how should I break it in? I want to break it in correct so I can race it this sunday. Just let me know anything about this bike that will help me in keeping it totally mint. Thanks so much guys!