I would like to post my thoughts of the 2009 yz450f..The bike is by far the best mx bike i have ridden. It has smooth and trackable power. the stock suspension works great for me weighting in a 155 pounds. The bike handles really well...and the bike is super quiet in stock form. I have put the bike through the test..mx, off-road, and endurocross and the bike is amazing in all these fields...so before jumping on the 2010 band wagon dont be affraid to check out the 2009 first!!!