KTM SX250 2019

Engine

Design

 

1-cylinder 2-stroke engine, water-cooled, with reed intake and exhaust control

Displacement

249 cm³ (15.19 cu in)

Stroke

72 mm (2.83 in)

Hole

66.4 mm (2.614 in)

Exhaust valve, beginning of adjustment

5,500 rpm

Crankshaft bearing

1 grooved ball bearing/1 roller bearing

Conrod bearing

Needle bearing

Piston pin bearing

Needle bearing

Piston

Cast aluminum

Piston rings

2 half keystone rings

X distance (upper edge of piston to upper edge of cylinder)

0 … 0.10 mm (0 … 0.0039 in)

Z distance (height of control flap)

49.0 mm (1.929 in)

Primary transmission

26:73

Clutch

Multidisc clutch in oil bath/hydraulically activated

Transmission

5 gear transmission, claw shifted

Transmission ratio

First gear

14:28

Second gear

16:26

Third gear

18:24

Fourth gear

21:24

Fifth gear

22:21

Ignition system

Contactless controlled, fully electronic ignition with digital ignition adjustment, type Kokusan

Spark plug

NGK BR 8 ECM

Spark plug electrode gap

0.60 mm (0.0236 in)

Starting aid

Kick starter system

Gear oil

0.80 l (0.85 qt.)

Coolant

1.2 l (1.3 qt.)

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

7.5 l (1.98 US gal)

Carburator

Carburetor type

 

MIKUNI TMX 38

Carburetor identification number

TMX 38 87

Needle position

3rd position from top

Jet needle

6BFY42-71 (6BFY43-71)

Main jet

450 (430, 440, 460, 470)

Idling jet

35 (30 / 32.5 / 37.5 / 40)

Choke nozzle

80

Needle jet

S-1

Idle air adjusting screw

 

Open

1.5 turns

Frame

Frame

 

Central tube frame made of chrome molybdenum steel tubing

Fork

WP Suspension Upside down AER 48

   

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, floating brake calipers

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)

Offroad tire pressure

 

front

1.0 bar (15 psi)

rear

1.0 bar (15 psi)

Secondary ratio (All SX models)

14:50

Secondary ratio (All XC models)

13:50

Chain

5/8 x 1/4"

Rear sprockets available

48, 50, 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 (All SX models)

375 mm (14.76 in)

Ground clearance unloaded (All XC models)

370 mm (14.57 in)

Weight without fuel, approx. (All SX models)

95.5 kg (210.5 lb.)

Weight without fuel, approx. (All XC models)

99 kg (218 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.)