KTM 125 SX Owner's Manual page 115

21 TECHNICAL DATA
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
21.1.5 300 XC
Design
Displacement
Stroke
Bore
Exhaust valve - Beginning of adjustment
Exhaust valve - end of adjustment with red auxiliary spring
Exhaust valve - end of adjustment with yellow auxiliary spring
Exhaust valve - end of adjustment with green auxiliary spring
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
2 half keystone rings
0... 0.10 mm (0... 0.0039 in)
48 mm (1.89 in)
26:72
Multidisc clutch in oil bath/hydraulically activated
6-gear, claw shifted
14:32
16:26
20:25
22:23
25:22
26:20
Contactless controlled fully electronic ignition with digital igni-
tion adjustment, type Kokusan
NGK BR 7 ES
0.60 mm (0.0236 in)
Kick starter and electric starter
1-cylinder 2-stroke engine, water-cooled, with reed intake and
exhaust control
293.2 cm³ (17.892 cu in)
72 mm (2.83 in)
72 mm (2.83 in)
5,550 rpm
7,200 rpm
7,900 rpm
8,400 rpm
1 grooved ball bearing/1 roller bearing
Needle bearing
Needle bearing
Aluminum cast
2 rectangular rings
0... 0.10 mm (0... 0.0039 in)
48.5 mm (1.909 in)
26:72
Multidisc clutch in oil bath/hydraulically activated
6-gear, claw shifted
14:32
16:26
20:25
22:23
25:22
26:20
Contactless controlled fully electronic ignition with digital igni-
tion adjustment, type Kokusan
NGK BR 7 ES
0.60 mm (0.0236 in)
Kick starter and electric starter
113