KTM 125 SX 2021 - Page 6

TABLE OF CONTENTS
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15 COOLING SYSTEM .................................... 102
15.1 Cooling system .............................. 102
15.2 Radiator cover ............................... 102
15.3 Installing the radiator cover............. 102
15.4 Removing the radiator cover............ 103
15.5 Checking the antifreeze and
coolant level.................................. 103
15.6 Checking the coolant level .............. 104
15.7 Draining the coolant ................... 105
15.8 Refilling with coolant .................. 106
15.9 Changing the coolant .................. 107
16 TUNING THE ENGINE............................... 109
16.1 Checking throttle cable play............ 109
16.2 Adjusting throttle cable play ........ 109
16.3 Carburetor tuning........................... 110
16.4 Carburetor – idle setting ................. 112
16.5 Carburetor - adjusting the idle
speed ........................................ 113
16.6 Plug-in connector of ignition timing
map adjustment............................. 114
16.7 Changing the ignition timing map.... 114
16.8 Checking the basic position of the
shift lever...................................... 114
16.9 Adjusting the basic position of the
shift lever .................................. 115
17 SERVICE WORK ON THE ENGINE .............. 116
17.1 Emptying the carburetor float
chamber .................................... 116
17.2 Checking the gear oil level .............. 117
17.3 Changing the gear oil .................. 117
17.4 Adding the gear oil ..................... 118
18 CLEANING, CARE ..................................... 120
18.1 Cleaning the motorcycle ................. 120
19 STORAGE................................................. 122
19.1 Storage ......................................... 122
19.2 Preparing for use after storage......... 123
20 TROUBLESHOOTING ................................ 124
21 TECHNICAL DATA..................................... 126
21.1 Engine.......................................... 126
21.1.1 All 125 models.......................... 126
21.1.2 150 SX..................................... 126
21.2 Engine tightening torques ............... 127
21.3 Carburetor..................................... 129
21.3.1 125 SX..................................... 129
21.3.2 Carburetor tuning (125 SX)......... 129
21.3.3 Carburetor - basic setting for
sandy surfaces (All 125
models) .................................... 130
21.3.4 150 SX..................................... 131
21.3.5 Carburetor tuning (150 SX)......... 131
21.3.6 Basic carburetor setting for
sandy surfaces (150 SX)............. 132
21.3.7 125 XC US ............................... 133
21.3.8 Carburetor tuning (125 XC US) ... 133
21.3.9 Carburetor - basic setting for
sandy surfaces (All 125
models) .................................... 134
21.4 Capacities ..................................... 135
21.4.1 Gear oil..................................... 135
21.4.2 Coolant..................................... 135
21.4.3 Fuel ......................................... 135
21.5 Chassis ......................................... 135
21.6 Electrical system............................ 136
21.7 Tires............................................. 136
21.8 Fork.............................................. 136
21.8.1 All SX models............................ 136
21.8.2 125 XC US ............................... 137
21.9 Shock absorber.............................. 137
21.9.1 All SX models............................ 137
21.9.2 125 XC US ............................... 138
21.10 Chassis tightening torques .............. 139
22 SUBSTANCES .......................................... 141
23 AUXILIARY SUBSTANCES ......................... 143
24 STANDARDS ............................................ 145
25 LIST OF ABBREVIATIONS.......................... 146
INDEX ............................................................. 147