Boyesen RAD-43X Rad Valve

An aero-form reed valve that corrects the problems associated with existing reed valve designs. Maintains flow velocity through the valve and re-directs the intake charge for even distribution to the intake ports. Provides quicker, sharper throttle response and more horsepower. 1-piece aluminum casting; no manifolds to trim or plastic pieces to insert. Boyesen Pro Series RAD Reeds included.

Vehicle Fitment:

1990 KTM 350 EGS
1989-1990 KTM 350 EXC
1989-1990 KTM 350 MX
1987-1988 KTM 350 MXC
1994-1995 KTM 440 EXC
1994-1995 KTM 440 MXC
1994 KTM 440 SX
1989 KTM 500 DXC
1990 KTM 500 EXC
1992 KTM 500 EXC
2012-2015 KTM 500 EXC
2012 KTM 500 EXC Six Days
1982 KTM 500 K4
1989-1992 KTM 500 LC4
1985-1993 KTM 500 MX
1985-1986 KTM 500 MXC
1988 KTM 500 MXC
1992-1993 KTM 500 SX
2012-2015 KTM 500 XC-W
1992 KTM 550 DXC
1993-1996 KTM 550 MXC