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KTM 125 SX 2019 User Manual

KTM 125 SX 2019
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20 TECHNICAL DATA
118
Gearbox 6-gear, claw shifted
Transmission ratio
First gear 14:32
Second gear 15:30
Third gear 17:28
Fourth gear 19:27
Fifth gear 19:23
Sixth gear 22:24
Ignition Contactless controlled fully electronic ignition with
digital ignition adjustment, type Kokusan
Spark plug NGK BR9 ECMVX
Spark plug electrode gap 0.60 mm (0.0236 in)
Starting aid Kick starter
20.2 Engine tightening torques
Screw, inner membrane sheets EJOTDELTA PT
®
35x25 1 Nm (0.7 lbf ft)
Screw, membrane support plate EJOTDELTA PT
®
30x12 1 Nm (0.7 lbf ft)
Screw, outer membrane sheets EJOTDELTA PT
®
30x6 1 Nm (0.7 lbf ft)
Screw, clutch spring retainer M5 6 Nm (4.4 lbf ft)
Screw, control lever, exhaust con-
trol
M5 6 Nm (4.4 lbf ft)
Loctite
®
243™
Screw, crankshaft position sensor M5 6 Nm (4.4 lbf ft)
Loctite
®
243™
Screw, exhaust control cover M5 5 Nm (3.7 lbf ft)
Screw, locking lever M5 6 Nm (4.4 lbf ft)
Loctite
®
243™
Screw, retaining bracket, rotary
valve
M5 6 Nm (4.4 lbf ft)
Loctite
®
243™
Screw, stator M5 6 Nm (4.4 lbf ft)
Loctite
®
243™
Screw, water pump wheel M5 6 Nm (4.4 lbf ft)
Loctite
®
243™
Bleeder screw, cylinder head M6 8 Nm (5.9 lbf ft)
Drain plug, water pump cover M6 8 Nm (5.9 lbf ft)
Nut, adjusting screw, power valve M6 8 Nm (5.9 lbf ft)
Screw, alternator cover M6 8 Nm (5.9 lbf ft)
Screw, bearing retainer M6 10 Nm (7.4 lbf ft)
Loctite
®
243™
Screw, clutch slave cylinder M6 10 Nm (7.4 lbf ft)
Screw, control lever, exhaust con-
trol
M6 10 Nm (7.4 lbf ft)
Loctite
®
243™
Screw, engine case M6 10 Nm (7.4 lbf ft)
Screw, exhaust flange M6 10 Nm (7.4 lbf ft)
Screw, gear oil level check M6 8 Nm (5.9 lbf ft)
Screw, intake flange/reed valve
housing
M6 6 Nm (4.4 lbf ft)
Screw, intermediate clutch cover M6x20 10 Nm (7.4 lbf ft)

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KTM 125 SX 2019 Specifications

General IconGeneral
Displacement124.8 cm³
StarterKickstarter
Transmission6-speed
Fuel SystemMikuni TMX 38
Front BrakeDisc brake
Rear BrakeDisc brake
Ground Clearance375 mm
Seat Height950 mm
EMSKokusan
Engine Type1-cylinder, 2-stroke
Bore x Stroke54 mm x 54.5 mm
Rear SuspensionWP shock absorber with linkage
Fuel Tank Capacity7.5 l
ClutchWet, multi-disc clutch, Brembo hydraulics
Frame DesignCentral tube frame made of chrome molybdenum steel

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