I always grease the backs of the pads and the slider pins with blue brake grease and never hear any squeaks or squeals. You must be careful not to get any grease on the friction surfaces and not to overload the pads where any grease could squeeze out and end up somewhere it's not supposed to be. Just turned over 70K and will be installing the 3rd set of brake pads soon.
'07 CPB Blue; ZGST windscreen with MRA X-screen adjustable spoiler, tube bar adaptor, PC III, ATRE,BMC air filter, modified stock seat with 2nd Look cover,Scorpion Flame Ti slip-ons, Galfer rotors front and rear, braided-stainless lines, C-F 10R front fender, C-F hugger, C-F inner fairing panels, painted foreman's fins with faux C-F inlay, polished rim lips wired for heated gear and accessories, Givi V35 side bags and E41 topcase with SW-Motech qd mounts