Technical Specifications; Engine; Engine Tightening Torques - KTM 390 DUKE 2024 Owner's Manual

22 TECHNICAL SPECIFICATIONS

22.1
Design
Displacement
Stroke
Bore
Compression ratio
Control
Valve diameter, intake
Valve diameter, exhaust
Valve clearance, intake, cold
Valve clearance, exhaust, cold
Crankshaft bearing
Conrod bearing
Pistons
Piston rings
Engine lubrication
Primary transmission
Clutch
Transmission
Transmission ratio
1st gear
2nd gear
3rd gear
4th gear
5th gear
6th gear
Mixture preparation
Ignition
Alternator
Spark plug
Spark plug electrode gap
Cooling
Starting aid
22.2
Screw, gear position sensor
Oil nozzle
Oil spray jet
Oil spray jet, camshaft bearing
bridge
110

Engine

Engine tightening torques

M5
M5x0.8
M5x0.8
M5x0.8
1-cylinder 4-stroke engine, water-cooled
398 cm³ (24.29 cu in)
64 mm (2.52 in)
89 mm (3.5 in)
12.59:1
DOHC, four valves controlled via cam lever, chain
drive
36 mm (1.42 in)
29 mm (1.14 in)
0.10 ... 0.15 mm (0.0039 ... 0.0059 in)
0.15 ... 0.20 mm (0.0059 ... 0.0079 in)
Slide bearing
Slide bearing
Forged aluminum
1 compression ring, 1 tapered compression piston
ring, 1 oil scraper ring
Pressure circulation lubrication
33:86
Multi-disc clutch in oil bath
Sixth-gear manual transmission
12:32
14:26
19:27
21:24
23:22
25:21
Electronic fuel injection
Fully electric ignition
12 V, 230 W
BOSCHVR6NEU
1 mm (0.04 in)
Water cooling, permanent circulation of coolant by
water pump
Starter motor
5.5 Nm (4.06 lbf ft)
6 Nm (4.4 lbf ft)
6 Nm (4.4 lbf ft)
9 Nm (6.6 lbf ft)
Loctite ® 243™
Loctite ® 243™
Loctite ® 243™
Loctite ® 243™