I have just finished cleaning my radiators on my 2007 and they where plugged with lots of bugs and fuzz and anything else that could get in the air finns i used some hydrogen peroxide in hope that it would dissolve or soften the debris i let it soak for 1/2 hour then rinsed with a garden hose with a little pressure. it took some stuff out but still a lot left in there so i went and got some cleaning agent that is used on compressor coils and prayed them and let them soak for a half hour and rinsed them off with the hose ant then I used a air hose from a distance and got a lot more crap out so i did it again with the compressor coil cleaner.and now they are both nice and clean . no wonder my bike overheated last year out in Uta . Now i am thinking if I should put some kind of fine screen between the radiators and the grill that i could remove and clean or would it restrict the air flow to much . Thank you guys that posted about using the cleaning solutions for the radiators .