KTM 390 DUKE 2018 Service Workshop Repair Manual

Motorcycle.com's own revisit review doesn't undersell just how thorough the previous year's overhaul was: "with the update in 2017, the motorcycle is the spitting image of the much larger 1290 Super Duke R." That same review confirms the platform's genuine accolade run: "it would then come as no surprise that the refreshed 2017 model would clench the threepeat with the Best Lightweight/Entry-Level Motorcycle Of 2017, and at $5,299, it would also snatch up our Best Value Motorcycle Of 2017." For this exact 2018 model year specifically, Motorcycle.com's own testing confirms "nothing has changed between model year '17 and '18 besides a white color option for 2018" from a spec-sheet perspective — though BikeDekho's own reporting reveals KTM quietly addressed several genuine real-world issues under the surface.

Power comes from a 373cc liquid-cooled DOHC single-cylinder engine, fed by electronic fuel injection with ride-by-wire throttle control, delivering a claimed 44 hp (43.5 PS) at 9,500 rpm and roughly 26-27 lb-ft (35-37 Nm) of torque at 7,000 rpm through a 6-speed transmission with a mechanically operated slipper clutch. BikeDekho's own reporting on this exact model year confirms genuine hidden refinement work: "the TFT instrument cluster gets a software update, the earlier AV 39 software making way for the newer AV 41 version. Issues plaguing earlier 2017 bikes — like the headlamps switching off intermittently and ECU error flashing on the display — will reportedly be a thing of the past now... the 2018 390 Duke also gets a larger radiator fan which should help dissipate heat from the engine faster." Wikipedia's own detailed running-change record confirms the specific hardware fix applied this exact year: "in 2018, KTM updated its Duke 390 with some minor changes, where it added a deflector plate on the left side of the chassis, to avoid exhaust heat near the rider's leg" — a genuine, real-world comfort fix addressing owner complaints from the prior year's redesign.

MCN's own review confirms the full scope of the 2017 overhaul this bike carried forward essentially unchanged into 2018: "as well as new styling the fuel tank capacity is up from 11 to 13.4 litres and there's a new two-piece seat, handlebars, adjustable levers, riding modes, ABS and a new 1290 Super Duke R-style LED headlight... a multi-function glass-fronted 5.2-inch TFT dash with Bluetooth connectivity." Wikipedia's own detailed spec comparison confirms the exact chassis changes: front brake disc grew from 300mm to 320mm, seat height rose from 800mm to 830mm, wheelbase shrank by 10mm, and both brake and clutch levers became manually adjustable for reach. Motorcycle.com's own testing found the TFT display's genuine functional sophistication a real highlight of daily use: "if you find yourself riding at night, the TFT display auto-adjusts to the ambient light and will display a black background. Backlit controls on each handlebar control module are also helpful in low light." Suspension consisted of 43mm WP cartridge-type inverted forks and a WP monoshock, with braking through the enlarged 320mm front disc and a 230mm rear disc, both by Bybre, with ABS standard. This exact 2018 specification — genuinely the same fundamental machine as the 2017 relaunch, with the heat-deflector and firmware fixes quietly folded in — represented the platform's most fully sorted iteration before KTM's next substantial 390 Duke redesign arrived in later model years.

This factory service manual covers the procedures, torque specs, and diagrams needed to keep a 2018 390 Duke running the way it was built to.