RC 390Edit

A sport bike version of the 390 Duke, the KTM RC 390 was presented at the 2013 EICMA motorcycle show in Italy, though most details had been leaked a few weeks earlier.The 2014 model year road racing style bike has the same 373 cc engine making a claimed 44 hp (33 kW) @ 9,500 rpm with a claimed weight without fuel of 147 kg (324 lb). With a fuel capacity 10.0 l; 2.20 imp gal (2.64 US gal), the wet weight would be 154.2 kg (340.0 lb). The frame of the RC is a different single piece trellis frame than the Duke, which KTM says is stiffer than the 390 Duke. The tires are Metzeler 110/70ZR17 front and 150/60ZR17 rear. Where the Duke has a steering head angle of 65° (or 25° rake), the RC's fork has a steeper 66.5° head angle (or 23.5° rake).The 1,340 mm (53 in) wheelbase is 27 mm (1.1 in) shorter than the Duke. The same ByBre disc brakes with ABS, and WP 43 mm front fork and rear shock are used on the RC 390.

KTM added a racing version of the RC 390, the RC 390 Cup for use by motorcycle racers ages 13 to 21 in the ADAC Junior Cup, a MotoGP event. The RC 390 Cup has no lights or mirrors, and no ABS to reduce weight, and an upgraded WP suspension, fully adjustable front and rear. The engine is detuned to a 38 hp (28 kW) with a block-off plate, and has an Akrapovič exhaust.

Motorcycle Consumer News tests of the RC 390's power were 30.04 kW (40.29 hp) @ 8,600 rpm and 32.92 N⋅m (24.28 ft⋅lb) torque @ 6,800 rpm, with a wet weight of 165.3 kg (364.5 lb) They found a top speed of 167.4 km/h (104.0 mph), with an acceleration from 0 to ¹⁄₄ mi (0.00 to 0.40 km) in 14.02 seconds at 147.87 km/h (91.88 mph), 0 to 97 km/h (0 to 60 mph) in 5.53 seconds, and braking from 97 to 0 km/h (60 to 0 mph) in 43.1 m (141.3 ft). The tested fuel economy was 4.17 L/100 km; 67.7 mpg_‑imp(56.4 mpg_‑US).

Cycle World's road tests of the RC 390 also showed a top speed of 167 km/h (104 mph), but faster acceleration 0 to ¹⁄₄ mi (0.00 to 0.40 km) in 13.67 seconds at 147.87 km/h (91.88 mph), and from 0 to 97 km/h (0 to 60 mph) in 4.6 seconds. Braking performance and fuel economy were not so far off, at 97 to 0 km/h (60 to 0 mph) in 43.1 m (141.3 ft), and 4.1 L/100 km; 70 mpg_‑imp (58 mpg_‑US).Cycle Worlds's tested power figure was 29.9 kW (40.1 hp) @ 8,600 rpm, and torque was 34.4 N⋅m (25.4 ft⋅lb).

Motorcycle USA measured acceleration from 0-60 mph in 4.9 seconds and 0 to ¹⁄₄ mi (0.00 to 0.40 km) in 14.21 seconds for 2015 model. Braking distance was measured at 148.2 feet from 60-0 mph with ABS disabled and 151.7 feet without ABS disabled.

KTM revised the RC 390 in 2017 by adding a slipper clutch, adjustable brake levers, ride-by-wire throttle, a larger 320 mm front brake rotor, larger mirrors, and some cosmetic and ergonomic changes.