KTM SXF250 2019

Engine

Design

 

1-cylinder 4-stroke engine, water-cooled

Displacement

249.91 cm³ (15.2505 cu in)

Stroke

52.3 mm (2.059 in)

Bore

78 mm (3.07 in)

Compression ratio

14.4:1

Idle speed

2,250 … 2,350 rpm

Control

DOHC, four valves controlled via cam lever, drive via timing chain

Valve diameter, intake

32.5 mm (1.28 in)

Valve diameter, exhaust

26.5 mm (1.043 in)

Valve clearance

Intake at: 20 °C (68 °F)

0.10 … 0.15 mm (0.0039 … 0.0059 in)

Exhaust at: 20 °C (68 °F)

0.13 … 0.18 mm (0.0051 … 0.0071 in)

Crankshaft bearing

2 cylinder bearings

Conrod bearing

Slide bearing

Piston pin bearing

Bearing bush

Pistons

Forged light alloy

Piston rings

1 compression ring, 1 oil scraper ring

Engine lubrication

Pressure circulation lubrication with two Eaton pumps

Primary transmission

24:73

Clutch

Multidisc clutch in oil bath/hydraulically activated

Transmission ratio (All SX-F models)

First gear

13:32

Second gear

16:32

Third gear

17:28

Fourth gear

19:26

Fifth gear

21:25

Transmission ratio (XC-F US)

First gear

13:32

Second gear

16:30

Third gear

16:24

Fourth gear

23:28

Fifth gear

23:23

Sixth gear

26:20

Electric

Alternator

 

12 V, 70 W

Ignition

Contactless controlled fully electronic ignition with digital ignition adjustment

Spark plug

NGK LMAR9AI-8

Spark plug electrode gap

0.8 mm (0.031 in)

Cooling

Water cooling, permanent circulation of coolant by water pump

Starting aid

Electric starter

Engine oil

1.0 l (1.1 qt.) – 10W50

Coolant

0.95 l (1 qt.)

Total fuel tank capacity, approx. (All SX-F models)

7 l (1.8 US gal)

Battery

Lithium-ion battery, Battery voltage: 12 V, 2.0 Ah, Maintenance-free

Fuse

10A

Remaining indicator lamps (XC-F US)

W2.3W / socket W2x4.6d - 12 V

Malfunction indicator lamp

LED

Frame

Frame

 

Central tube frame made of chrome molybdenum steel tubing

Fork

WP Suspension Upside down AER 48

Suspension travel

 

front

310 mm (12.2 in)

rear

300 mm (11.81 in)

Fork offset

22 mm (0.87 in)

Shock absorber

WP Suspension 5018 DCC Link

Brake system

Disc brakes, brake calipers on floating bearings

Brake discs - diameter

 

front

260 mm (10.24 in)

rear

220 mm (8.66 in)

Brake discs - wear limit

 

front

2.5 mm (0.098 in)

rear

3.5 mm (0.138 in)

Tire air pressure, offroad

 

front

1.0 bar (15 psi)

rear

1.0 bar (15 psi)

Secondary ratio (All SX-F models)

2:51 PM

Secondary ratio (XC-F US)

1:50 PM

Chain

5/8 x 1/4"

Available rear sprockets

48, 50, 51, 52

Steering head angle

63.9°

Wheelbase

1,485 ± 10 mm (58.46 ± 0.39 in)

Seat height, unloaded

950 mm (37.4 in)

Ground clearance, unloaded

370 mm (14.57 in)

Weight without fuel, approx. (All SX-F models)

99 kg (218 lb.)

Weight without fuel, approx. (XC-F US)

100 kg (220 lb.)

Maximum permissible front axle load

145 kg (320 lb.)

Maximum permissible rear axle load

190 kg (419 lb.)

Maximum permissible overall weight

335 kg (739 lb.)

 

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