Hi Clyde,
I think the cause has to do with it being only a single live-side piston pushing the pads together then when brake is released the pads do not slide appart as fast or as far as they should . One supposed half cure is to apply a bit of moly-grease to the sliderpins on which they hang, but then, how often do you have to take them apart just to grease them ?
Saw the "new" KLR 650 at the Toronto bike show and noticed that it has a different Nissin rear brake caliper which does have two pads identical, but the front is still the same asymetric pad design.And the rear fender is a worse design sticking far out the back with the same flimsy style license plate holder deep down beneath tooooooo close to the tire, and the fenders are now painted on a basic black plastic , prone to start chipping off. The display model had already lost a big flake of colour coat from being bumped in the show! At leas t the old-style fender was impregnated colour and not likely to dig in like this new scoop. Other than those changes it still looked like the same KLR 25liter tank below the new (fragile?) fairings

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http://advrider.com/index.php?thread....207964/page-5 then scroll down to post #93