I have a good question for you guys. I have a 2003 YZF450, and have been riding it for almost the whole summer, Had a Kawasaki before. Anyway, I used to race probobly 6 years ago, then got out of riding. Then 3 years ago, I started to race sno-x, then decided to get back into bikes. Anyway, long story short, I am right at the point of moving up to the 250 amateur class, and right now I am having issues with the suspension being real harsh, but also bottoming out on bigger stuff. The bike is all stock right now. I was thinking of having the suspension done by Pro Action. That would be a complete re-valve front and rear, along with an aluminum piston for the rear shock, new oil, and setup for me at the races... What kind of improvement should I expect for my money... I know the suspension will be much more plush, and resist bottoming a lot more... Can I also expect better braking charactaristics, and better cornering. Where will I see the most improvement?