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KTM 125 SX 2021 User Manual

KTM 125 SX 2021
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21 TECHNICAL DATA
128
Screw, intake flange/reed valve
housing
M6 6 Nm (4.4 lbf ft)
Screw, intermediate clutch cover M6x20 10 Nm (7.4 lbf ft)
Screw, intermediate clutch cover M6x25 10 Nm (7.4 lbf ft)
Screw, intermediate clutch cover M6x30 10 Nm (7.4 lbf ft)
Screw, kick starter stop plate M6 10 Nm (7.4 lbf ft)
Loctite
®
243™
Screw, outer clutch cover M6x20 8 Nm (5.9 lbf ft)
Screw, outer clutch cover M6x50 8 Nm (5.9 lbf ft)
Screw, shift drum locating M6 10 Nm (7.4 lbf ft)
Loctite
®
243™
Screw, shift lever M6 14 Nm (10.3 lbf ft)
Loctite
®
243™
Screw, starter motor (125 XC US) M6 8 Nm (5.9 lbf ft)
Screw, stator (125 XC US) M6 8 Nm (5.9 lbf ft)
Loctite
®
243™
Screw, stop plate of exhaust con-
trol
M6 10 Nm (7.4 lbf ft)
Loctite
®
243™
Screw, water pump cover M6 10 Nm (7.4 lbf ft)
Vacuum connection, housing
breather
M6 2 Nm (1.5 lbf ft)
Screw, cylinder head M7 18 Nm (13.3 lbf ft)
Nut, cylinder base M8 23 Nm (17 lbf ft)
Screw, cylinder base M8 10 Nm (7.4 lbf ft)
Screw, kick starter lever M8 25 Nm (18.4 lbf ft)
Loctite
®
2701™
Screw, engine sprocket M10 60 Nm (44.3 lbf ft)
Loctite
®
2701™
Gear oil drain plug M10x1 15 Nm (11.1 lbf ft)
Nut, rotor (All SX models) M12x1 60 Nm (44.3 lbf ft)
Nut, rotor (125 XC US) M12x1 50 Nm (36.9 lbf ft)
Gear oil drain plug with magnet M12x1.5 20 Nm (14.8 lbf ft)
Spark plug M14x1.25 25 Nm (18.4 lbf ft)
Nut, primary gear wheel M16LHx1.5 130 Nm (95.9 lbf ft)
Loctite
®
243™
Nut, inner clutch hub M18x1.5 100 Nm (73.8 lbf ft)
Loctite
®
243™

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KTM 125 SX 2021 Specifications

General IconGeneral
Engine Type1-cylinder, 2-stroke engine
Displacement124.8 cm³
Bore x Stroke54 mm x 54.5 mm
StarterKickstarter
Transmission6-speed
Front SuspensionWP XACT-USD, Ø 48 mm
Rear SuspensionWP XACT Monoshock with linkage
CoolingLiquid cooled
Front Tire80/100-21"
Rear Tire100/90-19"
Seat Height950 mm
Ground Clearance375 mm
FrameCentral tube frame made of chrome molybdenum steel
Front BrakeDisc brake
Rear BrakeDisc brake
Fuel Tank Capacity7.5 liters
Fuel SystemMikuni TMX carburetor

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