Re your comment on rear caliper drag.... It could be as simple as the master cyl piston could be not returning all the way and causing the drag.
Or, in my case this year, I had to replace the caliper seals as they were still original and no longer as pliable as they need to be.
BTW, you should be able to get caliper seal kits/ and or master cylinder rebuild kits from Motobins, as US dealers are no longer able to buy them.
Don't ignore it. There have been some fires due to the caliper over-heating the disk and igniting the rubber boot on the final drive connection.