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KTM
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125 SX 2020
KTM 125 SX 2020 User Manual
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20
TECHNICAL
DATA
120
POS
Needle
position
from
top
MJ
Main
jet
Info
Do
not
use
on
sandy
terrain.
20.3.3
Carburetor
-
basic
setting
for
sandy
surfaces
(All
125
models)
Idle
air
adjusting
screw
Open
2
turns
Idling
jet
37.5
Jet
needle
6BFY42
‑
71
Needle
position
3rd
position
from
top
Main
jet
580
Info
If
the
engine
is
not
running
smoothly,
use
a
smaller
main
jet.
121
123
Table of Contents
Table of Contents
4
Means of Representation 1
7
Symbols Used
7
Formats Used
7
Safety Advice
8
Use Definition - Intended Use
8
Misuse
8
Degrees of Risk and Symbols
8
Tampering Warning
9
Safe Operation
9
Protective Clothing
10
Work Rules
10
Environment
10
Owner's Manual
10
Important Notes 3
11
Manufacturer and Implied Warranty
11
Fuel, Auxiliary Substances
11
Spare Parts, Accessories
11
Service
11
Figures
11
Customer Service
11
View of Vehicle
12
View of Vehicle, Front Left (Example)
12
View of Vehicle, Rear Right (Example)
13
Serial Numbers
14
Vehicle Identification Number
14
Type Label
14
Engine Number
14
Fork Part Number
14
Shock Absorber Article Number
15
Controls
16
Clutch Lever
16
Hand Brake Lever
16
Throttle Grip
16
Kill Switch
16
Opening Fuel Tank Filler Cap
17
Closing the Fuel Tank Filler Cap
17
Fuel Tap
18
Choke
18
Shift Lever
18
Kick Starter Lever
19
Foot Brake Lever
19
Plug-In Stand
19
Service Hour Counter
20
Preparing for Use 7
21
Advice on Preparing for First Use
21
Running in the Engine
22
Preparing the Vehicle for Difficult Operating Conditions
22
Preparing the Vehicle for Riding on Dry Sand
23
Preparing the Vehicle for Riding on Wet Sand
24
Preparing the Vehicle for Riding on Wet and Muddy Circuits
26
Preparing Vehicle for High Temperatures or Slow Riding
26
Preparing the Vehicle for Low Temperatures or Snow
27
Riding Instructions
28
Checks and Maintenance Measures When Preparing for Use
28
Starting
28
Starting off
29
Shifting, Riding
29
Applying the Brakes
30
Stopping, Parking
30
Transporting
31
Refueling
32
Service Schedule 9
33
Additional Information
33
Required Work
33
Recommended Work
34
Tuning the Chassis 10
35
Checking the Basic Chassis Setting with Rider's Weight
35
Air Suspension AER 48
35
Compression Damping of the Shock Absorber
36
Adjusting the Low-Speed Compression Damping of the Shock Absorber
36
Adjusting the High-Speed Compression Damping of the Shock Absorber
37
Adjusting the Rebound Damping of the Shock Absorber
37
Measuring the Rear Wheel Dimension Unloaded
38
Checking the Static Sag of the Shock Absorber
39
Checking the Riding Sag of the Shock Absorber
39
Adjusting the Spring Preload of the Shock Absorber
40
Adjusting the Riding Sag
41
Checking the Basic Setting of the Fork
41
Adjusting the Fork Air Pressure
42
Adjusting the Compression Damping of the Fork
43
Adjusting the Rebound Damping of the Fork
44
Handlebar Position
44
Adjusting the Handlebar Position
45
Service Work on the Chassis 11
47
Raising the Motorcycle with a Lift Stand
47
Removing the Motorcycle from the Lift Stand
47
Bleeding the Fork Legs
47
Cleaning the Dust Boots of the Fork Legs
48
Removing the Fork Legs
49
Installing the Fork Legs
49
Removing the Fork Protector
50
Installing the Fork Protector
50
Removing the Lower Triple Clamp
50
Installing the Lower Triple Clamp
51
Checking Steering Head Bearing Play
53
Adjusting Steering Head Bearing Play
54
Lubricating the Steering Head Bearing
54
Removing the Start Number Plate
55
Installing the Start Number Plate
55
Removing Front Fender
55
Installing Front Fender
55
Removing the Shock Absorber
56
Installing the Shock Absorber
57
Removing the Seat
59
Mounting the Seat
59
Removing the Air Filter Box Cover
60
Installing the Air Filter Box Cover
61
Removing the Air Filter
61
Cleaning the Air Filter and Air Filter Box
62
Installing the Air Filter
63
Preparing Air Filter Box Cover for Securing
63
Removing the Main Silencer
63
Installing the Main Silencer
64
Changing the Glass Fiber Yarn Filling in the Main Silencer
64
Removing the Fuel Tank
65
Installing the Fuel Tank
66
Checking the Chain for Dirt
67
Cleaning the Chain
68
Checking the Chain Tension
68
Adjusting the Chain Tension
69
Checking the Chain, Rear Sprocket, Engine Sprocket, and Chain Guide
70
Checking the Frame
73
Checking the Link Fork
73
Checking Throttle Cable Routing
73
Checking the Rubber Grip
74
Adjusting the Basic Position of the Clutch Lever
75
Checking/Correcting the Fluid Level of the Hydraulic Clutch
75
Changing the Hydraulic Clutch Fluid
76
12 Brake System
78
Checking the Free Travel of the Hand Brake Lever
78
Adjusting the Basic Position of the Hand Brake Lever
78
Checking the Brake Discs
78
Checking the Front Brake Fluid Level
79
Adding Front Brake Fluid
80
Checking the Front Brake Linings
81
Changing the Front Brake Linings
81
Checking the Free Travel of Foot Brake Lever
84
Adjusting the Basic Position of the Foot Brake Lever
84
Checking the Rear Brake Fluid Level
85
Adding Rear Brake Fluid
85
Checking the Brake Linings of the Rear Brake
87
Changing the Rear Brake Linings
87
13 Wheels, Tires
90
Removing the Front Wheel
90
Installing the Front Wheel
91
Removing the Rear Wheel
91
Installing the Rear Wheel
92
Checking the Tire Condition
94
Checking Tire Pressure
94
Checking Spoke Tension
95
14 Cooling System
96
Radiator Cover
96
Installing the Radiator Cover
96
Removing the Radiator Cover
97
Checking the Antifreeze and Coolant Level
97
Checking the Coolant Level
98
Draining the Coolant
99
Refilling with Coolant
100
Tuning the Engine 15
101
Checking Throttle Cable Play
101
Adjusting Throttle Cable Play
101
Carburetor Tuning
102
Carburetor - Idle Setting
104
Carburetor - Adjusting the Idle
105
Plug-In Connector of Ignition Timing
106
Map Adjustment
106
Changing the Ignition Timing Map
106
Checking the Basic Position of the
106
Shift Lever
106
Adjusting the Basic Position of the Shift Lever
106
16 Service Work on the Engine
108
Emptying the Carburetor Float Chamber
108
Checking the Gear Oil Level
109
Changing the Gear Oil
109
Adding the Gear Oil
110
Cleaning, Care
112
Cleaning the Motorcycle
112
18 Storage
114
Preparing for Use after Storage
115
19 Troubleshooting
116
20 Technical Data
118
Engine
118
All 125 Models
118
All 150 Models
118
Engine Tightening Torques
119
Carburetor
121
All 125 Models
121
Carburetor Tuning (All 125 Models)
121
Carburetor - Basic Setting for Sandy Surfaces (All 125 Models)
122
All 150 Models
123
Carburetor Tuning (All 150 Models)
123
Basic Carburetor Setting for Sandy Surfaces (All 150 Models)
124
Capacities
124
Gear Oil
124
Coolant
124
Fuel
124
Chassis
124
Tires
125
Fork
125
125/150 Sx Eu
125
125/150 Sx Us
126
Shock Absorber
126
125/150 Sx Eu
126
125/150 Sx Us
127
Substances
130
Auxiliary Substances
132
Standards
134
List of Abbreviations
135
Index
136
5
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KTM 125 SX 2020 Specifications
General
Brand
KTM
Model
125 SX 2020
Category
Motorcycle
Language
English
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