Sx Eu, 250 Sx Usa; Xc Usa - KTM 125 SX EU Owner's Manual

21 TECHNICAL DATA
5th gear
6th gear
Ignition
Ignition point (BTDC)
Spark plug
Spark plug electrode gap
Starting aid
21.1.3

250 SX EU, 250 SX USA

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
1st gear
2nd gear
3rd gear
4th gear
5th gear
Ignition
Ignition point (BTDC)
Spark plug
Spark plug electrode gap
Starting aid
21.1.4

150 XC USA

Design
Displacement
Stroke
Bore
Crankshaft bearing
Conrod bearing
Piston pin bearing
Pistons
Piston rings
19:23
22:24
Contactless controlled fully electronic ignition with digital igni-
tion adjustment, type Kokusan
1.4 mm (0.055 in)
NGK BR9 ECMVX
0.60 mm (0.0236 in)
Kick starter
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)
5,600 rpm
7,200 rpm
7,900 rpm
8,400 rpm
1 grooved ball bearing/1 roller bearing
Needle bearing
Needle bearing
Aluminum cast
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
5-gear, claw shifted
14:28
15:24
18:24
21:24
22:21
Contactless controlled fully electronic ignition with digital igni-
tion adjustment, type Kokusan
1.9 mm (0.075 in)
NGK BR 8 ECM
0.60 mm (0.0236 in)
Kick starter
1-cylinder 2-stroke engine, water-cooled, with reed intake and
exhaust control
143.6 cm³ (8.763 cu in)
58.4 mm (2.299 in)
56 mm (2.2 in)
1 grooved ball bearing/1 roller bearing
Needle bearing
Needle bearing
Aluminum cast
2 half keystone rings
100