maxxed out my 400ex tonight
 

me and my brother rode beside my brothers friends silverado and he clocked us at 66mph on the concrete. it was fun.

maxxed out my 400ex tonight
 

oh ya we both have kn and no airbox lid

maxxed out my 400ex tonight
 

I would think it would go closer to 70 than 65 but some engines go a little faster than others.[img]i/expressions/face-icon-small-wink.gif[/img] Is the top speed fast enough for you?

maxxed out my 400ex tonight
 

jetting can effect top speed. with those changes it might change the top a little one way or another.

maxxed out my 400ex tonight
 

I figured it would go faster but i guess that is sort of fast. Ive topped mine out too.

maxxed out my 400ex tonight
 

gearing ratio can account for variations too.

maxxed out my 400ex tonight
 

most people think that quads go alot faster than they really do, probly just because 65 with wind and dust blowin in ur face feels alot faster than 65 in a completely sealed car. ever stick ur head out the window on the highway? seems like ur going alot faster then. i dont think any stock quads go over 75 mph, maybe even less.

maxxed out my 400ex tonight
 

Yeah . It fells alot faster when ur not enclosed.

maxxed out my 400ex tonight
 

try 181mph ........pass a car............................................... ............voom..........................

maxxed out my 400ex tonight
 

the reading could have been off, because its very hard to stay perfectly even with a car.