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23 TECHNICAL DATA 172

4th gear 21:24

5th gear 23:22

6th gear 25:21

Mixture preparation Electronically controlled fuel injection

Ignition Contactless controlled fully electronic ignition with digital ignition

adjustment

Alternator 12 V, 296 W

Spark plug BOSCH VR 5 NE

Spark plug electrode gap 0.8 mm (0.031 in)

Spark plug BOSCH VR 5 NEU

Spark plug electrode gap 1 mm (0.04 in)

Cooling Water cooling, permanent circulation of coolant by water pump

Idle speed 1,450… 1,550 rpm

Starting aid Electric starter

23.2 Engine tightening torques

Oil nozzle M5 6 Nm (4.4 lbf ft) Loctite

243™

Screw, gear sensor M5 6 Nm (4.4 lbf ft) Loctite

243™

Screw, ignition pulse generator M5 6 Nm (4.4 lbf ft) Loctite

243™

Screw, oil filter cover M5 8 Nm (5.9 lbf ft) –

Screw, retaining bracket M5 6 Nm (4.4 lbf ft) Loctite

243™

Screw, retaining bracket, stator cable M5 8 Nm (5.9 lbf ft) Loctite

243™

Screw, stator M5 8 Nm (5.9 lbf ft) Loctite

243™

Cylinder head screw M6 12 Nm (8.9 lbf ft) –

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KTM RC 390 Specifications

General

Displacement	373.2 cc
Max Torque	37 Nm @ 7000 rpm
Transmission	6-speed
Cooling System	Liquid Cooled
Front Suspension	WP APEX 43
Rear Suspension	WP APEX Monoshock
Rear Brake	230 mm disc, single-piston floating caliper
Fuel Tank Capacity	13.7 liters
Seat Height	824 mm
Bore x Stroke	89 mm x 60 mm
Compression Ratio	12.6:1
Frame	Steel Trellis Frame, Powder Coated
Engine Type	Single-cylinder, 4-stroke
Max Power	43.5 PS @ 9000 rpm
Fuel System	Electronic Fuel Injection
Front Brake	320 mm disc, 4-piston radial caliper
ABS	Dual Channel ABS
Dry Weight	172 kg
Front Tire	110/70 R17
Rear Tire	150/60 R17
Ground Clearance	158 mm