I use twin air, you get what you pay for. I wouldn't use a k&n if you plan to ride off-road. You'll get more than your share of dirt in the motor and that WILL wear the valves prematurely.
Current Rides:1998 KTM 620 Adventure
Past Rides: 1994 KTM 400 EXC WP/D LC4 - Plated; 2001 BMW F650GS Thumper; 1970 CB175; 2003 KLR250