I had the same issues with my 2017 Duke 690. I installed Kev's O2 mod and have been VERY happy with the result. Fuel economy is a bit lower, but the choppiness below 4500 rpms (when the computer is in closed loop mode) is pretty much gone. I can now cruise the neighorhood at 30 mph with a smooth engine :-)
Another happy Kevs O2 user. You have to take the right hand side panel off near the radiator. Tape/tie wrap the unit above the fuse box. Unplug the O2 sensor lead and insert Kevs O2 in-between. Assemble bike. Do the throttle adaption 15 minute run.
Then enjoy the lower revs and smoothness of the bike
Previous bikes: GoPed, FS1SE, CB125T, RD350F, Z400F(4), CB250T, RGV250, KLR650, FZ750, TDR250, RD350F2, DR650, FZS600-S, FX650, XL1200N, GSR600, Tiger1050
Now: KTM Duke 690 (5)/2017
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