Technical Specifications; Engine; Engine Tightening Torques - KTM 125 SX 2024 Owner's Manual

23.1

Engine

Design
Displacement
Stroke
Bore
Idle speed
Crankshaft bearing
Conrod bearing
Piston pin bearing
Pistons
Piston rings
X (upper edge of piston to upper edge of cylinder)
Z (height of control flap)
Primary transmission
Clutch
Gearbox
Transmission ratio
first-gear
second-gear
third-gear
fourth-gear
fifth-gear
sixth-gear
Ignition
Spark plug
Spark plug electrode gap
Starting aid
23.2

Engine tightening torques

Screw, inner membrane sheets
Screw, membrane support plate
Screw, outer membrane sheets
Nut, adjusting screw, control flap
Screw, bearing retainer
Screw, clutch spring retainer
Screw, control lever, exhaust con-
trol
Screw, crankshaft speed sensor
Screw, exhaust control cap
Screw, exhaust control cover
Screw, locking lever
1-cylinder 2-stroke engine, water-cooled, with reed
intake and exhaust control
124.8 cm³ (7.616 cu in)
54.5 mm (2.146 in)
54 mm (2.13 in)
1,400 ... 1,500 rpm
1 grooved ball bearing/1 roller bearing
Needle bearing
Needle bearing
Aluminum
1 rectangular ring, 1 half keystone ring
0 ... 0.10 mm (0 ... 0.0039 in)
36.5 mm (1.437 in)
23:73
Multidisc clutch in oil bath/hydraulically activated
6-gear transmission, claw shifted
14:32
15:30
17:28
19:27
19:23
22:24
Electronic ignition
NGK BR10 ECMVX
0.60 mm (0.0236 in)
Electric starter system
EJOT DELTA PT ®
3.5x25
EJOT DELTA PT ® 3x12
EJOT DELTA PT ® 3x6
M5
M5
M5
M5
M5
M5
M5
M5

TECHNICAL SPECIFICATIONS 23

1 Nm (0.7 lbf ft)
1 Nm (0.7 lbf ft)
1 Nm (0.7 lbf ft)
6 Nm (4.4 lbf ft)
6 Nm (4.4 lbf ft)
Loctite
6 Nm (4.4 lbf ft)
8 Nm (5.9 lbf ft)
Loctite
6 Nm (4.4 lbf ft)
Loctite
5 Nm (3.7 lbf ft)
6 Nm (4.4 lbf ft)
6 Nm (4.4 lbf ft)
Loctite
® 243™
® 243™
® 243™
® 243™
131