i have gotten my to about 70 on an asphalt rode.
i have a clock gun and my friend clocked it i was in 4th gear pinned hitin 22
i have a 05 z 400 i race a car and i was in 5 gear maxed out at 73 and my bike is stock
I have a modded z400 that goes 70 and i beat a 400ex(stock) by like ten lengths so probly around 60
i have a suzuki LT 230 and it will go around 60-70 with the .30 over bore kit so stock around 55
stock to stock my buddy has a z400 and i have a 400ex and me and him are the same weight and we are side by side the hole time and they both will go about 70mph it depends how much weight you put on the quads
160mph
+65mph
999
not fast enough
about 116 mph
60-65 mph
mine goes 86Km