All 250 Models; All 300 Models - KTM 125 ECX EU Owner's Manual

TECHNICAL DATA - ENGINE
6th gear
Ignition
Ignition point (BTDC)
Spark plug
Spark plug electrode gap
Starting aid

All 250 models

20.3
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
6th gear
Ignition
Ignition point (BTDC)
Spark plug
Spark plug electrode gap
Starting aid

All 300 models

20.4
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
22:20
Contactless controlled fully electronic ignition with digital igni-
tion adjustment, type Kokusan
1.6 mm (0.063 in)
NGK BR 8 EG
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
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
1.9 mm (0.075 in)
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 cm³ (17.88 cu in)
72 mm (2.83 in)
72 mm (2.83 in)
5,600 rpm
7,200 rpm
7,900 rpm
8,400 rpm
1 grooved ball bearing/1 roller bearing
107