not fast at all only if you jet the carb, have a intake, and big bore kit recomend a 416 not no bigger than that
It depends on what model. But the 2004 400ex can go as fast as 70-75mph.
400ex does 60 tops.
73
My 400ex is stock and it will run about 87 mph. there is no way they may go 65 but no way 87 your crazy
0 to 50 on a good day
54 to 58mph (in stock)
87 mph
50 to 58 mph ive had one so i know
I have a modded z400 that goes 70 and i beat a 400ex(stock) by like ten lengths so probly around 60
i raced my friend on my 07 400ex and i smoked his 06 300ex and he had his HMF slipe on pipe to.
mine is basically stock and tops out at 70 mph
The 250R is going to win