Technical Data 21; Engine; Engine Tightening Torques - KTM 50 SX 2020 Owner's Manual

Table of Contents

21.1

Engine

Design

Displacement

Stroke

Bore

Crankshaft bearing

Conrod bearing

Piston pin bearing

Pistons

Piston rings

Engine lubrication (50 SX)

Engine lubrication (50 SX Mini)

Primary transmission

Clutch

Gearbox

Transmission ratio

Ignition

Spark plug

Spark plug electrode gap

Cooling

Starting aid

21.2

Engine tightening torques

Screw, bearing retainer

Screw, kick starter lever

Screw, oil pump (50 SX Mini)

Screw, stator clamp

Screw, water pump impeller

Bleeder flange of engine case

Drain plug, water pump cover

Screw, alternator cover

Screw, clutch cover

Screw, engine case

Screw, engine sprocket cover

Screw, exhaust flange

Screw, fitting pin

Screw, gear oil level monitoring

Screw, ground wire

1-cylinder 2-stroke engine, water-cooled, with reed

intake

49.0 cm³ (2.99 cu in)

40 mm (1.57 in)

39.5 mm (1.555 in)

2 grooved ball bearings

Needle bearing

Aluminum cast

1 rectangular ring

Mixture oil lubrication

Separate lubrication

33:61 straight cut spur gear

Multi-disc centrifugal force clutch on the main shaft

Rigid 1-stage reduction gear

14:31

SELETTRA 2p D36

NGK LR 8 B

0.60 mm (0.0236 in)

Water-cooled

Kick starter system