I just got a new 250EX along with a White brothers pipe,Uni-Filter, and air box vent.I was going to order a k&n jet kit and the parts man at the dealership said dont buy the whole kit just get on this site and ask other 250ex owners which one worked for them. So does anybody have my set-up and what size should I try first. Thanks

 

I think you should buy the kit. It's really hard to pop in a jet and have it be the right one, because there are so many variables. Altitude, temperature, mods, and vehicle condition all affect jetting. I would recommend you buy the kit and start with what they recommend for your altitude and mods, then fine tune from there. Good luck.

 

I think your right, sometimes these guys behind the counter just dont know what there talking about.