I just ran my 07 yfz 450se down the black top on flat road with a gps and i got 83 mph's out of the old girl which i thought was pretty good......i have a rossier exhaust on it k+n intake re jetted and exhaust cam tooth changed and 21 inch holeshot gncc on the rear..... just wondering what others get out of theres...please be honest....... oh ya this is in wisconsin too about 1000 feet above sea level......later joe31

 

Dirtwheels Magazine said in one of their 450 shootouts that a yfz will run about 74 mph completely stock.

 

that sounds about right for the mods you have,I have had my 08 Raptor 700 up to 80'sh with a full GYTR exhaust and GYTR intake..With a PC3 ..Thats with the rev limiter still on..I have no desire to ever go that fast on my ATV ever again lol

 

Like 180mph.

 

its got a pipe.. koopa, you know it'll do faster than 180....

stock 07 yfz 450 with a lil carb adjustment will top out at about 75, 76 mph with stock tires, dunno with the pipe n jet kit.... you put 22's on the back and it will fly, put 18's on it and its a whellie monster that tops out about 60-65