it was 15 bux at walmart it was made for a bicycle but it works on my ex the wiring was hard to figure out and its hard to keep it from getting ripped while riding through brush and stuff but its holding up good the sensor can be a pain to get to get the correct distance between it and the magnet but once its there your set a stock 400ex does bout 65 or 66 71 is stock speed for a raptor just ready for someone round here to get a raptor so i can see how a 400cc engine with just abox mods, pipe, and larger sprocket can go against it

 

I don't think I would trust that, once you get up to a certain speed with that speedometer it could be giving you the wrong readings since it was designed to read relatively slower speeds, maybe not though.

 

Trail Tech speedo is 69.95 heard good things, I will get one soon. Go to RockymountainATV.com

 

when on the 400, race him a buncha times and wait for him to red light and it's all your's

 

In a straight line drag, it's gonna be impossible without major motor mods. In the woods, where rider ability is more important than machine, you may take him if you are a better rider.

 

I think I would go with the Trailtech also, at least I know it is made for my machine then.