Hey Knobbiethrower, I regularly beat guys on 520's (even on straightaways)
because they think that because their bikes pull easy wheelies and have massive power that they will be able to win races or beat me to the next turn. NOT TRUE!!! My 400
is much easier to ride and race and find traction too. The only guys that can
really put the 520 to REAL use are top experts and pros. Fact is, it is the rider, not the bike. Just remember, John Dowd still gets beat regularly by guys on 250's too. J.D., For tighter tracks and woods, the 400 really is superior. For hill climbs, open desert, or roosting your buddies, or just to brag that you have the bike with the most power(which I highly doubt that you will ever have the thing WIDE OPEN and in total control except in a straightline drag race) then the 520 is for you. Insane, ... seriously consider your riding ability, and be honest with yourself. Then consider what type of riding you will be doing. Then make an educated choice. Erik