KTM 450 SMR 2021 User Manual (English)

Other manuals for KTM 450 SMR 2021

Questions and Answers:

K
Kristi WeaverAug 2, 2025
What to do if KTM 450 SMR 2021 Motorcycle engine turns over but won't start?
- J
  Jeffrey BellAug 2, 2025
  If your KTM Motorcycle engine turns but does not start, several factors could be the cause. Ensure the quick release coupling is joined. If the fuel screen in the quick release coupling is clogged, change it. Adjust the idle speed if it is not set correctly. If the spark plug is oily or wet, clean and dry it, or replace it if necessary. Also, ensure the plug gap of the spark plug is correctly adjusted to 0.8 mm (0.031 in). Check the wiring harness for frayed short-circuit cables and the stop button for faults. Finally, if there's a malfunction in the electronic fuel injection, read out the fault memory using the KTM diagnostics tool.
R
Ryan ShafferAug 6, 2025
What to do if malfunction indicator lamp lights up on KTM 450 SMR 2021 Motorcycle?
- L
  Laura Todd DDSAug 6, 2025
  If the malfunction indicator lamp lights up or flashes on your KTM Motorcycle, stop the motorcycle and identify the faulty component using the blink code. Check the wiring for damage and the electrical plug-in connections for corrosion and damage. Also, read out the fault memory using the KTM diagnostics tool to diagnose any errors in the electronic fuel injection.
D
Daniel JonesAug 10, 2025
How to fix KTM 450 SMR 2021 Motorcycle if engine does not turn?
- A
  Amy MitchellAug 10, 2025
  If your KTM Motorcycle engine does not turn when you press the start button, it could be due to several reasons. You may need to carry out the start procedure. The 12 V battery might be discharged, requiring you to charge it, check the charging voltage, the open-circuit current, and the stator winding of the alternator. It's also possible that the main fuse is blown, which means you should change the main fuse. The starter relay or the starter motor could also be defective, so you should check those as well.
F
Francisco WilliamsAug 15, 2025
Why does my KTM 450 SMR 2021 engine overheat?
- D
  Diana BrownAug 15, 2025
  If your KTM Motorcycle engine overheats, it could be due to several reasons. First, check the coolant level and look for any leakage in the cooling system. If the coolant level is low, add more coolant. Ensure there is sufficient air stream; switch off the engine when standing. Clean the radiator fins if they are very dirty. If there's foam formation in the cooling system, drain and refill the coolant. Finally, check the radiator hose and change it if it's bent.
K
Kathryn HancockAug 19, 2025
Why does my KTM 450 SMR 2021 Motorcycle have no power?
- S
  Shaun ClarkAug 19, 2025
  If your KTM Motorcycle engine has too little power, start by cleaning the air filter and air filter box. If the fuel filter is very dirty, change it. If there is a malfunction in the electronic fuel injection, read out the fault memory using the KTM diagnostics tool. Check the exhaust system for damage; change the glass fiber yarn filling of the main silencer if needed. Lastly, adjust the valve clearance if it's too little.
P
pdavisAug 23, 2025
Why is my KTM 450 SMR 2021 consuming so much oil?
- D
  Dawn TapiaAug 23, 2025
  High oil consumption in your KTM Motorcycle can be attributed to several causes. Ensure the engine vent hose is routed without bends, or replace it if necessary. Check the engine oil level; if it's too high, adjust it. If the engine oil is too thin, change the engine oil and the oil filter, and clean the oil screens. Lastly, worn piston or cylinder can also cause high oil consumption, so measure the piston/cylinder mounting clearance.
M
Maureen ThomasAug 27, 2025
Why is my KTM 450 SMR 2021 battery draining?
- B
  Brian StewartAug 28, 2025
  If the 12 V battery is discharged on your KTM Motorcycle, it could be due to a couple of reasons. The 12 V battery may not be charging, so check the charging voltage and the stator winding of the alternator. Another possibility is an unwanted power consumer, in which case you should check the open-circuit current.

KTM 450 SMR 2021 Specifications

General

Displacement	449.9 cc
Bore x Stroke	95 mm x 63.4 mm
Compression Ratio	12.75:1
Power	63 hp
Transmission	5-speed
Starter	Electric starter
Cooling	Liquid cooling
Rear Suspension	WP XACT Monoshock
Ground Clearance	370 mm
Engine Type	Single-cylinder, four-stroke
Fuel System	Electronic fuel injection
Frame	Chromium-molybdenum steel
Front Suspension	WP XACT 48 mm
Front Brake	310 mm Disc
Rear Brake	220 mm Disc
Tank Capacity	7.5 liters
Fuel Tank Capacity	7.5 liters

Summary

MEANS OF REPRESENTATION

Symbols Used

Explains the meaning of symbols used in the manual.

Formats Used

Explains typographical formats used in the document.

SAFETY ADVICE

General Safety Information

Defines intended use, misuse, general safety rules, and risk symbols.

Safe Operation and Protective Measures

Covers tampering warnings, safe operation, protective clothing, and work rules.

Environmental and Manual Information

Discusses environmental responsibility and the owner's manual.

IMPORTANT NOTES

Manufacturer Warranty and Service

Outlines warranty conditions and service requirements.

Fuel, Auxiliary Substances, and Spare Parts

Covers fuel types, fluids, and approved parts.

Service and Customer Support

Importance of proper service and customer service information.

VIEW OF VEHICLE

Vehicle Component Identification

Identifies key components using front left and rear right views.

SERIAL NUMBERS

Identification Numbers

Specifies locations for VIN, engine number, type label, and part numbers.

CONTROLS

Handlebar and Switchgear Controls

Explains levers, grips, buttons, switches, and indicator lamps.

Fuel Tank and Starting Controls

Details fuel tank filler cap, cold start, idle speed, and shift lever.

PREPARING FOR USE

First Use Preparations and Break-in

Essential steps before the first ride and engine run-in guidance.

RIDING INSTRUCTIONS

Pre-Ride Checks and Starting Procedure

Crucial checks before riding and engine starting procedures.

Riding Aids and Techniques

Using launch/traction control, shifting, riding, and braking techniques.

Stopping, Parking, and Transporting

Safe methods for stopping, parking, and transporting the vehicle.

SERVICE SCHEDULE

Required and Recommended Maintenance

Lists mandatory and suggested service tasks based on intervals.

TUNING THE CHASSIS

Chassis Setup and Suspension Tuning

Adjusting suspension based on rider weight, damping, and sag.

Fork Adjustment and Handlebar Position

Tuning fork air pressure, damping, and handlebar position.

SERVICE WORK ON THE CHASSIS

Fork System Maintenance

Procedures for fork legs, triple clamp, and steering head bearing.

Shock Absorber and Chassis Components Service

Removing/installing shock absorber, seat, air filter, fuel tank.

Drive Chain and Frame Maintenance

Maintenance for chain, sprockets, frame, and link fork.

BRAKE SYSTEM

Brake Lever, Disc, and Fluid Maintenance

Adjusting levers, checking discs, and managing brake fluid.

Brake Lining Replacement

Instructions for changing front and rear brake linings.

WHEELS, TIRES

Wheel Removal and Installation

Procedures for removing and installing front and rear wheels.

Tire and Spoke Checks

Inspecting tire condition, pressure, and spoke tension.

ELECTRICAL SYSTEM

12-V Battery and Main Fuse Service

Procedures for battery maintenance and fuse replacement.

COOLING SYSTEM

Coolant Level and Maintenance

Checking antifreeze, coolant level, draining, and refilling.

TUNING THE ENGINE

Throttle Control and Idle Speed Tuning

Adjusting throttle cable play, response mapping, and idle speed.

Shift Lever and Throttle Valve Position

Adjusting shift lever and teaching throttle valve position.

SERVICE WORK ON THE ENGINE

Fuel Screen and Engine Oil Service

Changing fuel screen and engine oil/filter.

CLEANING, CARE

Motorcycle Cleaning and Care

Guidelines for safely cleaning and caring for the motorcycle.

STORAGE

Storage Preparation and Retrieval

Procedures for preparing for and using after storage.

TROUBLESHOOTING

Fault Diagnosis and Solutions

Lists common faults, possible causes, and corrective actions.

BLINK CODE

Error Code Interpretation

Explains error codes indicated by the malfunction indicator lamp.

TECHNICAL DATA

Engine, Chassis, and Electrical Specifications

Detailed technical data for engine, chassis, electrical system, and tires.

Torques, Capacities, and Suspension Settings

Tightening torques, fluid capacities, fork/shock absorber settings.

SUBSTANCES

Recommended Fluids and Lubricants

Details recommended brake fluid, coolant, and engine oil specifications.

AUXILIARY SUBSTANCES

Cleaning and Lubrication Products

Lists recommended cleaners, sprays, greases, and preserving materials.

STANDARDS

Oil Standards Explained

Explains JASO T903 MA2 and SAE standards relevant to engine oils.

LIST OF SYMBOLS

Indicator Symbol Explanations

Explains the meaning of yellow and orange indicator symbols.

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Table of Contents