the fastest stock 450 ATV is the ds 450 by can-am.
no it is a 4 stroke without the electric start, battery, headlights ect.
Okay the banshee is exceptionaly slow even for a two stroke. im saying the fastest ATV as of right now is a YFZ 450
None, they all suck.
The 450 SX is a single cylinder 4 stroke, so no you do not mix gas.
ktm 450 sx
Honda
four stroke.
the yfz 450 is not that fastest quad, Its not far from the top but raptors have more top speed. there is no 250 that will stand up to a yfz 450 stock
pastrana has a 2007 Rm250 2-stroke to do the freestyling. when it comes to racing he has the new RM-Z 450 suzuki 4-stroke.
A KTM 250sx is the worlds fastest 250 2 stroke dirtbike.
the fastest swimming stroke is the butterfly...well it is supposed to be, but since it is such i difficult stroke as well it is harder to swim a long distance well. So the most efficient and fast stroke would have to be freestyle (the front crawl) hope i helped :) The fastest stroke is front crawl, full stop!