So how fast can a quadsport be?

 

I've ridden every one of those bikes, and the quadsport doesn't have a chance stock against any, with the exception of the blaster(rider variables). They can be as fast as your wallet is thick.

 

i have an 88 lt250r, paul turner pipe,k and n filter,and it runs right about even with my two stock banshees,will kill my buddies 400 ex,would murder a blaster, plus the power of the 250 seems way more useable than a banshees

 

Which quadsport are you talking about? I assume it's the 230. There's also the LT80, LT250, and Z250 and Z400. They're all quadsports. As for the LT230S, completely modded with a big bore and cam and larger carb, you can get about as quick as a stock 400EX.