For $2 at your local Lowe's or Home Depot you can buy either the aluminum or fiber screening material. I bought one that was about 6" too big for the radiator, folded it several times in about 1" pleats for rigidity and stuck it in front of the radiator. The top folds over the framework at the top of the radiator, one support bolt in the middle of the radiator will poke a hole all the way through the material, further holding it in place. Have never overheated in 5 years, no bugs or road debris gets through, and it simply "shakes" clean after the bugs are dead and dry. Pretty simple and inexpensive fix.