I own a 2001 250EX. I previously had a '99 Recon. I was looking for more power, so I started looking at the snorkel. It has a very small hole for the motor to breathe from. So, I got out the air grinder and ground out the entire end of the snorkel. So now it had a very large hole to breathe from. I put the snorkel back on and it would not even run (as in above idle), because the carb now needed rejetting. The 250EX theoretically would want more air than the recon. If one ground out just the beginning of the snorkel and rejetted the carb I have a feeling they would gain quite a bit of power from this! If anyone tries this notify me, I would be highly interested in how it runs!