I bought the rad guards from Thumper and it appears that the air viens have to come off the radiator. It'll be very muddy here in PA (as soon as it thaws ) and I was considering sheet metal screwing the viens to the outside of the guards and grinding off the extra threads on the rad side of the guard. Or will the guards be enough to keep the radiators from packing with mud? Bill ------------------ 86TT225, 99WR, WR timing, throttle stop trimmed, air box lid removed, White Bros head pipe, silencer and air filter. De-octopussed. Works frame guards and Thumper Rad Guards. Odometer and headlight removed. Moose hand and mud guards. YZ stock tank, IMS seat and number plate. Renthal Jimmy Button "highs" and Renthal Soft half waffle grips. AMA, SETRA, Happy Ramblers MXC.