I just purchased a used all stock 2005 250ex for my wife, what are some mods that can be done to the 250

 

Tires!!! The balooney stock tires are way lame! I like ITP Holeshot XC's or TrakStar (radials really improve the ride!).

Skid plates and bumper.

Are you looking for a little more power....engine mods???

 

ya, the tires suck ***, i have been looking at the holeshots. More power would be great, dont want to dump alot of $$$ into it, but a little more power would be cool

 

On ours, we have vented the airbox lid (1" UNI round filtered vents), UNI foam air filter (has its own support cage, not the restrictive stock one), an FMF muffler (I would go with PowerCore 4 today), and of course a rejet. The difference in power is noticeable, but not dramatic.

If you ride in the wet a lot and don't want to vent the airbox lid, you can enlarge the snorkle opening (which stock is the size of a quarter). Don't get to radical with the airbox though. The little engine can only handle so much air. I tried pulling the lid off completely, but couldn't get it to jet right with that much air coming in.

 

Thanks for the info, i will give it a try.