I have a 2001 250ex. I put a White Brothers E-series pipe on and also a white brothers powerfilter. I haven't done anything else to it and I don't have a radar gun or anything. I was wondering what my top speed would be?

 

i would say around 52, would be my guess

 

well the top speed isn't that high normally its still a 250, to get some serious top speed changes you'd need to change the gearing, but i think that is hard on a 250 because its shaft i believe??? the pipe will give you more power, and the air filter and what not gives you more air to the motor which gives you more horses, i think you got more horses than speed with those mods, but i'd say the same as KINGOFTHEMUDHOLES 52mph.

 

not fast enough get more MODS!