I love birthday suit bikes. Naked, upright, and more often than not, very fast. They offer riders 88.7% of the experience a proper sport bike can provide, and won’t leave you with early-onset arthritis from riding to work every day. The wide handlebars and more relaxed rider triangle mean it’s not quite as quick around a racetrack, but I’ll trade seconds to save my wrists, lower back and hip flexors.
But naked bikes are still sport bikes, effectively. The 11.3% difference between the two and the experience you’ll have on either one is subject to a rider’s ability and their willingness to ride the thing to the ragged edge. For the record, I made up all that math, but it feels about right.
For 2026, KTM decided to add an additional ‘R’ to the already pirate-y Super Duke 1390 R, with the introduction of the… wait for it… Super Duke 1390 RR.
