You cant go by the stock speedos you really need a GPS.
Realisticly THe 400 will hit 55 a 500SP 60 500Scrammy 65 a 600 SP 55-65.
400 Scrammy 2x4 god only knows.

 

50-55 with a 225 person on board. Why is this important? This is too fast!

 

SLOW DOWN DON'T HURT YOURSELF

 

It is hard to slow down after riding dirtbikes and sleds for so long. The average sled dose 70mph at a min. My dirtbike goes 110mph down long fire roads. You make it sound so scary to go fast.

 

I had my scrambler 400 4X4 up to 68.7 on the GPS and the handle bars were shaking so bad I could not read the screen on the GPS anymore. I let off but I could have got more out of it on ideal conditions and no mud caked on the rims.

 

**it happens

 

i can get mine to hit 60 up on blocks...

 

my 450 will do 60 EASY without blinkin and eye...................on the trailer

 

well my spedo must be off ,, buddys must be off also ...

 

Unless it's a two stroke 400, you ain't going to get a hair past 55mph downhill with a 800 behind you pushing!! My brother and I baught new sportsmans in 2005. He got the 400 and I got the 500ho. Stock my 500 would run 55mph, after a few minor mods it would do 58mph. His stock 400 would do 50mph and level pavement and it took it forever. We ran these speeds with gps, if you're going by the speedometer then it's definetely not right. I recently upgraded to a sp800 and that's a different story.