Technical Data 23; Engine - KTM 450 Rally Factory Replica 2021 Owner's Manual

23.1

Engine

Design
Displacement
Stroke
Bore
Compression ratio
Idle speed
Control
Valve diameter, intake
Valve diameter, exhaust
Valve clearance
Intake at: 20 °C (68 °F)
Exhaust at: 20 °C (68 °F)
Crankshaft bearing
Conrod bearing
Piston pin bearing
Pistons
Piston rings
Engine lubrication
Primary transmission
Clutch
Gearbox
Transmission ratio
first-gear
second-gear
third-gear
fourth-gear
fifth-gear
sixth-gear
Alternator
Ignition
Spark plug
Spark plug electrode gap
Cooling
Starting aid
1-cylinder 4-stroke engine, water-cooled
449.3 cm³ (27.418 cu in)
63.4 mm (2.496 in)
95 mm (3.74 in)
12.6:1
2,400 ± 200 rpm
OHC, 4 valves controlled via rocker arm
40 mm (1.57 in)
33 mm (1.3 in)
0.10 ... 0.15 mm (0.0039 ... 0.0059 in)
0.12 ... 0.17 mm (0.0047 ... 0.0067 in)
2-cylinder roller bearing
Slide bearing
No bearing bush - DLC coated piston pin
Forged light alloy
1 compression ring, 1 oil scraper ring
Pressure circulation lubrication with 2 trochoidal
pumps
31:76
Multidisc clutch in oil bath, hydraulically activated
6-gear transmission, claw shifted
16:32
18:28
20:28
22:26
24:24
27:23
12 V, 200 W
Contactless controlled fully electronic ignition with
digital ignition adjustment
NGK LKAR8AI‑9
0.9 mm (0.035 in)
Water cooling, permanent circulation of coolant by
water pump
Starter motor

TECHNICAL DATA 23

135