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
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
mine is basically stock and tops out at 70 mph
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
65 to 70 mph stock
Yes it would all the models are almost the exact same.