2026 KTM 1390 Super Adventure R Review: Taming the Oregon Desert

Following a fast and cozy 300-mile highway stint burning asphalt from Southern California up to Mammoth Lakes, it was time to give KTM’s flagship heavyweight adventure machine the treatment it was truly built for. We loaded the 2026 KTM 1390 Super Adventure R ($23,599 with Tech Pack) into the factory race rig and headed north to Burns, Oregon, for the 15th annual Giant Loop Motorcycle Rally.

Nestled in the high desert of Eastern Oregon, the rally serves as the ultimate staging ground for ADV enthusiasts looking to kick up dust and build camaraderie. However, a deluge of rain turned the desert terrain into an unpredictable mix of slippery mud pits, fast gravel two-tracks, and swollen creek crossings. It was the perfect environment to see if KTM’s latest powerhouse could balance its massive street manners with legitimate dirt-bike DNA.

Balancing Act: Ergonomics and Electronics

Approaching the 1390 Super Adventure R, its towering posture immediately signals its off-road intentions. Featuring an elevated, commanding seat height, the bike gives riders an exceptional view of the trail ahead. While the front fairing isn’t as broad as some highway-oriented competitors in this segment, its narrower profile is an asset when navigating tighter trails.

Despite the 75-degree LC8 V-twin engine layout making the midsection slightly wide while seated, the ergonomics change dramatically when standing on the pegs. The inner surface area provides excellent contact points, allowing a six-foot rider to securely lock their legs against the chassis. This relieves pressure on the arms and yields precise control over the 545-pound machine. The handlebar bend feels natural, allowing you to easily shift your weight over the front end to maintain traction.

The standout feature of the cockpit is the massive, vertically mounted color TFT dashboard. It features a highly responsive touchscreen that works flawlessly even with heavy riding gloves. Navigating through menus to manage the complex electronics package is intuitive. The bike features several riding modes—Street, Sport, Off-Road, and Rally. In Rally mode, you can customize throttle response, engine braking, and adjust rear-wheel slip control on the fly.

Unleashing the LC8 on the Trail

Dropping the bike into gear and hitting the fire roads, the sheer capability of the 1350cc powerplant becomes clear. The engine transitions seamlessly from mild to wild; if you short-shift and lug the motor, it remains incredibly docile and tractor-like. But twist your wrist, and it unleases roughly 150 horsepower at the rear wheel, spinning the stock Dunlop Trailmax tires and stepping the rear end out like a true flat-tracker.

The chassis balance from front to back is outstanding, exhibiting very little of the dramatic pitching typically associated with large adventure bikes. KTM utilizes a direct-mount WP PDS rear shock—doing away with a traditional linkage system—paired with robust, fully adjustable inverted front forks. Delivering 9.4 inches of suspension travel, the setup effortlessly wallops potholes and floating rocks, providing a plush, comfortable ride that doesn’t beat up the rider over a long day in the saddle. A manual remote preload adjuster makes altering ride height a breeze, though modifying front preload increments requires getting weight off the front tire.

The braking system is equally well-tailored for loose terrain. The front dual-disc brakes are precise and progressive without being overly grabby, while the dual-piston rear brake offers excellent feel to keep the chassis settled and low before impacting trail obstacles.

Real-World Trail Gremlins

An authentic off-road test isn’t complete without a few mechanical challenges, and the Oregon backcountry exposed a couple of practical quirks on the new 1390.

While hammering through a rocky two-track section at a conservative 32 PSI, the front tubeless wheel suffered an impact that required installing an emergency inner tube. Diving into the factory toolkit revealed an oversight: removing the tire pressure monitoring system (TPMS) sensor to fit the tube requires a tiny Torx 10 wrench. This odd size is completely inconsistent with the larger, heavy-duty fasteners used across the rest of the motorcycle. Riders planning remote excursions will need to supplement their tool packs with a T10 key to avoid being stranded.

Additionally, while the bike features a generous six-gallon fuel tank, the digital fuel gauge runs heavily on the conservative side, triggering low-fuel warnings when nearly four gallons remain. Furthermore, the bike must be held perfectly upright and centered during fill-ups; if left on its side stand, the split-tank design prevents it from topping off completely. Later in the day, a nail claimed the rear tire, revealing that the digital dash lacked a clear visual TPMS warning indicator when tire pressures dropped rapidly, requiring the rider to detect the deflation strictly through chassis feedback.

The Verdict

Minor hardware and gauge complaints aside, KTM has engineered an incredibly well-balanced, high-performance machine. The 2026 KTM 1390 Super Adventure R effortlessly morphs from a comfortable mile-muncher into a highly capable off-road weapon with the push of a button. It handles deep mud, water crossings, and fast gravel with a level of composure that defies its heavyweight classification. For the adventure rider looking to push deeper into the wilderness without sacrificing asphalt comfort, this machine is undoubtedly the ticket.

KTM 1390 Super Adventure R Technical Specifications