I'm not dogging Jim's work in any way. I guess all this stuff is relative. I rode a Trinity 420 along time ago that was handing me my ass. That guy was beating me by like 8 bikes. It didn't feel that fast then. It was though.
My bike now has what I'd call kind of a motorcross setup on it. A-arms, wider axle, full skid plate, all that crap. I'm sure it's a heavy bike. I gauge it's performance off my buddies YFZ. It hasn't changed in the last several years. He's about my size and weight. Same riding experience. Difference in speed is in the bikes. I don't want to change the equipment on my bike but the guys with what are supposed to be similar engine setups are getting me by a few bikes. I'm kinda thinking it's something I'm going to have to live with.