2010's not only have a presumedly stronger tranny (albeit noisey with straight cut gears) but also have considerable drivetrain lash. The tranny redesign for 2011's cut rid of 80% (I think) of the lash so there is a good possibility that this is what you are feeling. Basicaly lash is slack in the drivetrain so in certain conditions you will still feel it when you're off the throttle.
Retired USAF, IYAAYAS!
2008 V-Star 1100 Custom Bobber project
2011 Crimson XR with Forged Highway Bars / Hard Bags / Passenger Backrest, Ness parts including Smooth Layback Plate Frame/Mount / Rad 3 Mirror / deep cut grips / drivers floorboards /shifter peg / brake peg / passenger pegs. Witchdoctor black rack, Lloydz filter / timing wheel / VFC III, 7Jurock windshield, Drag Specialties seat.