Join Date: Oct 2006
Location: Lebanon, TN Lincoln UK along time ago, TN, USA
I think a lot of the need for a guard depends upon the type of roads in your area. I'd never had them on any bike until I moved to TX.
There they seem to have a lot of seal and chip type roads where for some reason, probably the heat, the chips come loose very easily.
My first time out on my 1299, resulted in me having to have the nose fairing repainted because of the stone chips.
A friend had a stone chip damage the radiator of his first ride of his Aprilia Tuono RF.
So I now have them on all my bikes. They don't seem to affect the airflow or make the bike run hot. Whether they are effective protection, I think they are better than not having them considering how cheap and easy to install that they are.
'15 Ducati Panigale 1299S, '15 White Ducati Multistrada S (Vin #1000), '12 Aprilia Tuono V4 APRC, '08 KTM 300XCW, '07 Ducati 1098s, '98 Yamaha R1, '93 Bimota DB2, '76 Honda CB400F