Average speed of stock 400ex?

[choco]

.

[gncc025]

65 to 70

[hornetgod13]

The weight of the rider, the surface you are riding on, and even the altitude are factors that will effect the top speed. I would guess anywhere between 64 and 69 mph bone stock.

[choco]

so 67mph x 1.6 = km

107.2km/h that seems bit unrealistic but you know more than me.

[vett_09]

Originally posted by choco
so 67mph x 1.6 = km

107.2km/h that seems bit unrealistic but you know more than me.

Not really. A stock 400ex should run around 106 - 112 Km/h. It might take a stocker a little while to get there, but that's about what they run.

[choco]

Really?
Damn thanks.

[Live to ride]

Have a 416 on GPS it did just under 65 and my buddy with a stock 400 besides a K&N air filter ran just under 62. Need to do some tuning on the 416 if i only picked up 3 mph over stock, hope that helps.

[blasterandy]

adding performance mods to the engine is not going to make it faster. Only gearing and rpm limits will change top speed. so with the 416 you may want to add 1 tooth to the counter sprocket.

[mod440ex]

335mph in 1/4 mile

[wis400x]

6'3'' 230 LB. rider.Stock(besides slip on/k & N filter) 2001 400ex.

paved road = 69 mph on G.P.S.