Technical Data 20; Engine; Engine Tightening Torques - KTM 250 SX 2020 Owner's Manual

Table of Contents

20.1

Engine

Design

Displacement

Stroke

Hole

Exhaust valve, beginning of adjustment

Crankshaft bearing

Conrod bearing

Piston pin bearing

Piston

Piston rings

X distance (upper edge of piston to upper edge of

cylinder)

Z distance (height of control flap)

Primary transmission

Clutch

Transmission

Transmission ratio

First gear

Second gear

Third gear

Fourth gear

Fifth gear

Ignition system

Spark plug

Spark plug electrode gap

Starting aid

20.2

Engine tightening torques

Screw, inner membrane sheets

Screw, membrane support plate

Screw, outer membrane sheets

Screw, angle lever, exhaust control

Screw, bearing retainer

Screw, clutch spring retainer

Screw, crankshaft speed sensor

Screw, exhaust control bearing

support

Screw, exhaust control cap

Screw, exhaust control cover

1-cylinder 2-stroke engine, water-cooled, with reed

intake and exhaust control

249 cm³ (15.19 cu in)

72 mm (2.83 in)

66.4 mm (2.614 in)

5,500 rpm

1 grooved ball bearing/1 roller bearing

Needle bearing

Cast aluminum

2 half keystone rings

0 ... 0.10 mm (0 ... 0.0039 in)

49.0 mm (1.929 in)

26:73

Multidisc clutch in oil bath/hydraulically activated

5 gear transmission, claw shifted

14:28

16:26

18:24

21:24

22:21

Contactless controlled, fully electronic ignition with

digital ignition adjustment, type Kokusan

NGK BR 8 ECM

0.60 mm (0.0236 in)

Kick starter system

EJOTDELTA PT

35x25

EJOTDELTA PT

30x12

EJOTDELTA PT

30x6