Gas Man is completely right. It's more about the rider than the bike. Sure, slower guys with newer bikes will pull away off the corners but the great riders make up time on the brakes and carying corner speed. If it's not a race, don't worry about being slower. If a guy is truly a better rider he will pass you. If he's a D*&$ about it than he's a D*&$. Just have fun. I raced for 2 years and I spent the first half of the first year worrying about holding up the guys behind me. Then I ralized, hey, this is a race, I'm supposed to stay in front of them. Practice days are just that, practice. Don't worry about being the fastest. If you feel like you are holding someone up, pull to the side and stick out your leg or raise you hand so he knows you are letting him by. Have a great time and good luck.