It depends on what model. But the 2004 400ex can go as fast as 70-75mph.
400ex does 60 tops.
87 mph
54 to 58mph (in stock)
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
mine is basically stock and tops out at 70 mph
I have a modded z400 that goes 70 and i beat a 400ex(stock) by like ten lengths so probly around 60
about 87 mph depending on the rider. i customized mine and decked it out and it clocked me at 110 mph with upgrades.
73
i just gon mine right out the shop for Christmas and it tops around the high 60`s
not very fast , about 20 mph+
0 to 50 on a good day