KTM 65 SX 2023 User Manual (English)

Questions and Answers:

S
Sandra FordAug 17, 2025
Why KTM 65 SX 2023 Motorcycle engine has too little power?
- A
  Andre BensonAug 17, 2025
  If your KTM Motorcycle engine has too little power, several factors could be responsible. First, check for any interruptions in the fuel supply by inspecting the fuel tank breather, cleaning the fuel tap, and verifying the carburetor components. A very dirty air filter can restrict airflow, so clean the air filter and air filter box. Inspect the exhaust system for leaks or deformation, and consider replacing the glass fiber yarn filling in the main silencer. Finally, a fault in the ignition system can also cause a power loss, so check the ignition system and adjust the ignition.
S
Sabrina AndersonAug 21, 2025
Why KTM 65 SX 2023 Motorcycle engine does not speed up?
- G
  Garrett GarciaAug 21, 2025
  If your KTM Motorcycle engine does not speed up, there are a few potential causes. The carburetor running over because the float needle is dirty or worn can cause this issue, so check and set the carburetor components. Loose carburetor jets can also prevent the engine from speeding up properly, so check and set the carburetor components. Finally, a fault in the ignition system can also cause this problem, so check the ignition system and adjust the ignition.
P
Patricia VaughnAug 25, 2025
What to do if KTM 65 SX 2023 engine overheats?
- O
  oknoxAug 25, 2025
  If your KTM Motorcycle engine overheats, several potential issues could be the cause. Start by checking the cooling system for leaks and ensure the coolant level is adequate. Insufficient airflow can also lead to overheating, so switch off the engine when standing. Dirty radiator fins can impede cooling efficiency, so clean them. Foam formation in the cooling system can also cause overheating, so drain and refill the coolant. Inspect the cylinder head and cylinder head gasket for damage. A bent radiator hose can restrict coolant flow, so replace it if necessary. Lastly, an incorrect ignition point due to a loose stator can cause overheating, so adjust the ignition.
B
Brandon WhiteAug 27, 2025
How to fix KTM 65 SX 2023 Motorcycle engine with no idle speed?
- J
  Jennifer RiceAug 28, 2025
  If your KTM Motorcycle engine has no idle speed, several factors could be the cause. A blocked idling jet can prevent the engine from idling properly, so check and set the carburetor components. Distorted adjusting screws on the carburetor can also affect idle speed, so adjust the idle speed. A defective spark plug can cause idling issues, so replace the spark plug. Finally, a defective ignition system can also prevent proper idling, so check the ignition coil and the spark plug connector.
A
Alvin ShawAug 31, 2025
What to do if KTM Motorcycle engine stalls or is popping into the carburetor?
- A
  Amanda AllenAug 31, 2025
  If your KTM Motorcycle engine stalls or pops into the carburetor, it could be due to several reasons. First, ensure the engine isn't running out of fuel by turning the knurled screw on the fuel tap all the way counterclockwise and refilling the fuel tank if necessary. The engine taking in bad air can also cause these issues, so check the intake flange and carburetor for tightness. Also, ensure that connectors or the ignition coil are not loose or oxidized; clean the plug-in connection and treat it with contact spray.
R
Richard NorrisSep 3, 2025
Why KTM Motorcycle emits white smoke?
- C
  charveySep 3, 2025
  If your KTM Motorcycle emits white smoke (steam) in the exhaust gas, a potential cause is a damaged cylinder head or cylinder head gasket. In this case, you should check the cylinder head and cylinder head gasket.
A
Anthony CookSep 6, 2025
How to fix water in the gear oil of KTM Motorcycle?
- C
  Carolyn BrownSep 6, 2025
  If there is water in the gear oil of your KTM Motorcycle, it could be due to a damaged radial shaft seal ring or water pump. You should check the radial shaft seal ring and the water pump.
V
vincent87Sep 9, 2025
Why gear oil exits at the vent hose of KTM Motorcycle?
- R
  Rick HumphreySep 10, 2025
  If gear oil is exiting at the vent hose of your KTM Motorcycle, it is likely due to too much gear oil being added. To resolve this, check the gear oil level.

KTM 65 SX 2023 Specifications

General

Engine Type	1-cylinder, 2-stroke engine
Displacement	64.9 cm³
Bore x Stroke	45 mm x 40.8 mm
Starter	Kickstarter
Transmission	6-speed
Clutch	Wet, multi-disc clutch, Formula hydraulics
Rear Suspension	WP XACT monoshock
Front Brake	Disc brake
Rear Brake	Disc brake
Front Brake Disc Diameter	198 mm
Rear Brake Disc Diameter	160 mm
Front Tire	60/100-14"
Rear Tire	80/100-12"
Ground Clearance	280 mm
Seat Height	750 mm
Fuel Tank Capacity	3.5 l
Cooling	Liquid cooled
Front Suspension	WP XACT 35 USD fork, Ø 35 mm
Wheelbase	1137 mm ± 10 mm
Fuel System	Carburetor

Summary

DEAR KTM CUSTOMER

Vehicle Identification Number

Section to record vehicle identification number for reference.

Engine Number

Section to record engine number for reference.

MEANS OF REPRESENTATION

Symbols Used

Defines the meaning of symbols throughout the manual.

Formats Used

Explains typographical conventions used in the manual.

SAFETY ADVICE

Use Definition – Intended Use

Defines the proper intended use of the motorcycle.

Misuse

Outlines incorrect uses that can lead to danger.

Safety Advice

General safety guidelines and warnings.

Degrees of Risk and Symbols

Explains risk levels and associated symbols.

Tampering Warning

Warns against unauthorized modifications to the vehicle.

Safe Operation

Essential guidelines for safe and responsible vehicle operation.

Protective Clothing

Stresses the importance of wearing adequate protective gear.

Work Rules

General rules and conditions for performing work on the motorcycle.

Environment

Information on environmental responsibility and disposal.

Owner's Manual

Emphasizes the importance and use of the owner's manual.

IMPORTANT NOTES

Manufacturer Warranty, Implied Warranty

Details warranty terms and conditions.

Fuel, Auxiliary Substances

Notes on fuel types, additives, and environmental hazards.

Spare Parts, Technical Accessories

Guidance on using approved parts and accessories.

Service

Importance of regular service for vehicle longevity.

Figures

Note on figures potentially showing special equipment.

Customer Service

Information on contacting KTM customer support.

VIEW OF VEHICLE

View of Vehicle, Front Left (Example)

Labeled diagram of the vehicle's front left side.

View of Vehicle, Rear Right (Example)

Labeled diagram of the vehicle's rear right side.

SERIAL NUMBERS

Vehicle Identification Number

Location of the VIN on the steering head.

Type Label

Location of the vehicle's type label on the frame.

Engine Number

Location of the engine number on the engine case.

Fork Article Number

Location of the fork article number on the axle clamp.

Shock Absorber Article Number

Location of the shock absorber article number.

CONTROLS

Clutch Lever

Description of the clutch lever's function and location.

Hand Brake Lever

Description of the hand brake lever's function and location.

Throttle Grip

Description of the throttle grip's function and location.

Stop Button

Explanation of the stop button's operation and states.

Opening the Fuel Tank Filler Cap

Procedure and safety warnings for opening the fuel tank cap.

Closing the Fuel Tank Filler Cap

Procedure for closing the fuel tank filler cap.

Fuel Tap

Description of the fuel tap's operation and states.

Choke

Explanation of the choke lever for cold starts.

Shift Lever

Description of the shift lever and gear positions.

Kick Starter Lever

Description of the kick starter lever's operation.

Foot Brake Lever

Description of the foot brake lever's function.

Plug-in Stand

Description of the plug-in stand for parking.

Service Hour Counter

Explanation of the service hour counter's function.

PREPARING FOR USE

Advice on Preparing for First Use

Critical safety advice for the initial use of the vehicle.

Running in the Engine

Procedures and guidelines for the engine's break-in period.

RIDING INSTRUCTIONS

Checks and Maintenance Measures When Preparing for Use

Pre-ride checks and maintenance for safe operation.

Starting the Vehicle

Instructions and warnings for starting the engine.

Shifting, Riding

How to shift gears and ride the motorcycle.

Applying the Brakes

Proper techniques for applying the brakes.

Stopping, Parking

Guidelines for safely stopping and parking the motorcycle.

Transporting

Advice on safely transporting the motorcycle.

Refueling

Safety precautions and procedures for refueling the vehicle.

SERVICE SCHEDULE

Additional Information

General notes pertaining to the service schedule.

Required Work

Mandatory maintenance tasks at specified intervals.

Recommended Work

Recommended maintenance tasks at specified intervals.

TUNING THE CHASSIS

Checking the Basic Chassis Setting with Rider's Weight

Adjusting chassis settings based on rider weight.

Air Suspension XACT 5235

Description of the fork's air suspension system.

Compression Damping of the Shock Absorber

Explanation of shock absorber compression damping.

Adjusting the Low-Speed Compression Damping of the Shock Absorber

Procedure to adjust low-speed compression damping.

Adjusting the High-Speed Compression Damping of the Shock Absorber

Procedure to adjust high-speed compression damping.

Adjusting the Rebound Damping of the Shock Absorber

Procedure to adjust shock absorber rebound damping.

Measuring the Dimension of the Rear Wheel Unloaded

How to measure the rear wheel's unloaded dimension.

Checking the Static Sag of the Shock Absorber

Procedure to check the static sag of the shock absorber.

Checking the Riding Sag of the Shock Absorber

Procedure to check the riding sag of the shock absorber.

Adjusting the Spring Preload of the Shock Absorber

Procedure to adjust the shock absorber's spring preload.

Adjusting the Riding Sag

Procedure to adjust riding sag by changing springs.

Checking the Basic Setting of the Fork

How to check the fork's basic settings.

Adjusting the Fork Air Pressure

Procedure to adjust the fork's air pressure.

SERVICE WORK ON THE CHASSIS

Raising the Motorcycle with a Lift Stand

Instructions for safely lifting the motorcycle.

Removing the Motorcycle from the Lift Stand

Instructions for safely lowering the motorcycle.

Bleeding the Fork Legs

Procedure for bleeding air from the fork legs.

Cleaning the Dust Boots of the Fork Legs

How to clean the fork leg dust boots.

Removing the Fork Protector

Steps for removing the fork protector.

Installing the Fork Protector

Steps for installing the fork protector.

Removing the Fork Legs

Steps for removing the front fork legs.

Installing the Fork Legs

Steps for installing the front fork legs.

Removing the Lower Triple Clamp

Steps for removing the lower triple clamp.

Installing the Lower Triple Clamp

Steps for installing the lower triple clamp.

Checking the Steering Head Bearing Play

Procedure to check for play in the steering head bearing.

Adjusting the Steering Head Bearing Play

Procedure to adjust steering head bearing play.

Lubricating the Steering Head Bearing

Instructions for lubricating the steering head bearing.

Removing the Start Number Plate

Steps for removing the start number plate.

Installing the Start Number Plate

Steps for installing the start number plate.

Removing Front Fender

Steps for removing the front fender.

Installing Front Fender

Steps for installing the front fender.

Removing the Shock Absorber

Steps for removing the rear shock absorber.

Installing the Shock Absorber

Steps for installing the rear shock absorber.

Removing the Seat

Steps for removing the motorcycle seat.

Mounting the Seat

Steps for mounting the motorcycle seat.

Removing the Air Filter

Steps for removing the air filter.

Installing the Air Filter

Steps for installing the air filter.

Cleaning the Air Filter and Air Filter Box

How to clean the air filter and its box.

Removing the Main Silencer

Steps for removing the main silencer from the exhaust.

Installing the Main Silencer

Steps for installing the main silencer onto the exhaust.

Changing the Glass Fiber Yarn Filling of the Main Silencer

Instructions for changing the internal packing of the main silencer.

Removing the Fuel Tank

Steps for removing the fuel tank.

Installing the Fuel Tank

Steps for installing the fuel tank.

Checking the Chain for Dirt

Procedure for checking the drive chain for dirt accumulation.

Cleaning the Chain

Instructions for cleaning the drive chain.

Checking the Chain Tension

Details how to check the drive chain tension.

Adjusting the Chain Tension

Details how to adjust the drive chain tension.

Checking the Chain, Rear Sprocket, Engine Sprocket, and Chain Guide

Procedures for checking wear on drivetrain components.

Checking the Chain Sliding Piece for Wear

How to check the chain sliding piece for wear.

Checking the Chain Guide for Wear

How to check the chain guide for wear.

Checking the Frame

Instructions for checking the motorcycle frame for damage.

Checking the Link Fork

Instructions for checking the link fork for damage.

Checking the Throttle Cable Routing

How to check the throttle cable routing.

Checking the Rubber Grip

How to check the handlebar rubber grips for wear or damage.

Additionally Securing the Rubber Grip

Method for securing rubber grips with wire.

Adjusting the Basic Position of the Clutch Lever

How to adjust the clutch lever position.

Checking the Fluid Level of the Hydraulic Clutch

How to check the hydraulic clutch fluid level.

Correcting the Fluid Level of the Hydraulic Clutch

How to correct the hydraulic clutch fluid level.

Changing the Hydraulic Clutch Fluid

Steps for changing the hydraulic clutch fluid.

BRAKE SYSTEM

Checking the Free Travel of the Hand Brake Lever

How to check the free travel of the hand brake lever.

Adjusting the Basic Position of the Hand Brake Lever

How to adjust the hand brake lever's basic position.

Checking the Brake Discs

How to check the thickness and condition of brake discs.

Checking the Front Brake Fluid Level

How to check the front brake fluid level.

Adding Front Brake Fluid

How to add front brake fluid.

Checking the Front Brake Linings

How to check the minimum thickness of front brake linings.

Checking the Rear Brake Fluid Level

How to check the rear brake fluid level.

Adding Rear Brake Fluid

How to add rear brake fluid.

Checking the Rear Brake Linings

How to check the minimum thickness of rear brake linings.

Changing the Brake Linings of the Front Brake

Steps for changing the front brake linings.

Checking the Free Travel of the Foot Brake Lever

How to check the free travel of the foot brake lever.

Adjusting the Free Travel of the Foot Brake Lever

How to adjust the free travel of the foot brake lever.

Checking the Rear Brake Fluid Level

How to check the rear brake fluid level.

Adding Rear Brake Fluid

How to add rear brake fluid.

Checking the Rear Brake Linings

How to check the minimum thickness of rear brake linings.

Changing the Rear Brake Linings

Steps for changing the rear brake linings.

WHEELS, TIRES

Removing the Front Wheel

Steps for removing the front wheel.

Installing the Front Wheel

Steps for installing the front wheel.

Checking the Wheel Bearing for Damage and Wear

How to check front wheel bearings for damage and wear.

Removing the Rear Wheel

Steps for removing the rear wheel.

Installing the Rear Wheel

Steps for installing the rear wheel.

Checking the Tire Condition

How to check the condition of tires for cuts or damage.

Checking Tire Pressure

Details how to check and set tire pressure.

Checking Spoke Tension

How to check spoke tension for proper wheel integrity.

COOLING SYSTEM

Cooling System

Basic description of the cooling system's operation.

Checking the Antifreeze and Coolant Level

How to check antifreeze and coolant levels.

Checking the Coolant Level

How to check the radiator coolant level.

Draining the Coolant

Steps for draining the coolant from the system.

Refilling with Coolant

Steps for refilling the cooling system with coolant.

Changing the Coolant

Instructions for changing the coolant in the system.

TUNING THE ENGINE

Checking the Play in the Throttle Cable

How to check the throttle cable for correct play.

Adjusting the Play in the Throttle Cable

How to adjust the throttle cable play.

Carburettor – Idle Speed

Explains the importance of idle speed adjustment.

Carburetor – Adjusting the Idle Speed

Details the procedure for adjusting the carburetor's idle speed.

Emptying the Carburetor Float Chamber

Steps for emptying the carburetor float chamber.

SERVICE WORK ON THE ENGINE

Checking the Gear Oil Level

How to check the engine's gear oil level.

Changing the Gear Oil

Steps for changing the engine's gear oil.

Adding the Gear Oil

How to add gear oil to the engine.

CLEANING, CARE

Cleaning the Motorcycle

General instructions for cleaning the motorcycle.

STORAGE

Storage

Procedures for storing the motorcycle for extended periods.

Preparing for Use After Storage

Steps to prepare the motorcycle after it has been stored.

TROUBLESHOOTING

Engine Turns but Does Not Start

Troubleshooting steps for when the engine doesn't start.

Engine Has Too Little Power

Troubleshooting steps for low engine power.

Engine Stalls or is Popping into the Carburetor

Troubleshooting steps for engine stalling or backfiring.

Engine Overheats

Troubleshooting steps for engine overheating issues.

TECHNICAL DATA

Engine

Provides detailed technical specifications for the engine.

Engine Tightening Torques

Lists torque specifications for engine fasteners.

Carburetor

Provides specifications for the carburetor.

Carburetor Tuning

Offers tuning data for the carburetor based on conditions.

Capacities

Lists fluid capacities for the vehicle.

Fork

Provides technical data and specifications for the front fork.

Shock Absorber

Provides technical data and specifications for the shock absorber.

Spring Preload

Specifies the spring preload setting.

Spring Rate

Lists spring rates based on rider weight.

Chassis

Provides chassis-related technical data.

Frame

Describes the motorcycle frame construction.

Fork

Provides technical specifications for the fork.

Shock Absorber

Provides technical specifications for the shock absorber.

Brake System

Details specifications for the front and rear brake systems.

Offroad Tire Pressure

Specifies recommended off-road tire pressures.

Chassis Tightening Torques

Lists torque values for various chassis fasteners.

SUBSTANCES

Brake Fluid DOT 4 / DOT 5.1

Specifies standards and suppliers for brake fluid.

Coolant

Guidelines for coolant type and antifreeze protection.

Engine Oil (15W/50)

Specifies standards and suppliers for engine oil.

Engine Oil, 2-Stroke

Specifies standards and suppliers for 2-stroke engine oil.

Fork Oil (SAE 4)

Specifies standards and suppliers for fork oil.

Shock Absorber Fluid (SAE 2.5)

Specifies standards and suppliers for shock absorber fluid.

Super Unleaded (ROZ 95)

Guidelines for using super unleaded fuel.

Super Unleaded (95 Octane) Mixed with 2-Stroke Engine Oil (1:60)

Fuel mixture specifications for 2-stroke engines.

AUXILIARY SUBSTANCES

Air Filter Cleaner

Recommended air filter cleaning products.

Chain Cleaner

Recommended chain cleaning products.

Fuel Additive

Recommended fuel additive products.

High Viscosity Grease

Recommended high viscosity grease.

Long-Life Grease

Recommended long-life grease products.

Motorcycle Cleaner

Recommended motorcycle cleaning products.

Off-Road Chain Spray

Recommended off-road chain spray products.

Oil for Foam Air Filter

Recommended oil for foam air filters.

Preserving Materials for Paints, Metal and Rubber

Recommended products for preserving surfaces.

Rubber Grip Adhesive

Recommended adhesive for rubber grips.

Special Cleaner for Glossy and Matte Paint Finishes, Metal and Plastic Surfaces

Recommended cleaner for various surfaces.

Special Grease

Recommended special grease products.

Universal Oil Spray

Recommended universal oil spray products.

STANDARDS

JASO T903 MA2

Explains the JASO T903 MA2 motorcycle oil standard.

SAE

Explains SAE viscosity classifications for oils.

JASO FD

Explains the JASO FD 2-stroke engine oil classification.

LIST OF ABBREVIATIONS

Art. no.

Defines "Art. no." as Article number.

ca.

Defines "ca." as circa.

cf.

Defines "cf." as compare.

e.g.

Defines "e.g." as for example.

etc.

Defines "etc." as et cetera.

i.a.

Defines "i.a." as inter alia.

no.

Defines "no." as number.

poss.

Defines "poss." as possibly.

Related product manuals

KTM 65 SX 2023 User Manual

Table of Contents

Questions and Answers:

KTM 65 SX 2023 Specifications

Summary

DEAR KTM CUSTOMER

Vehicle Identification Number

Engine Number

MEANS OF REPRESENTATION

Symbols Used

Formats Used

SAFETY ADVICE

Use Definition – Intended Use

Misuse

Safety Advice

Degrees of Risk and Symbols

Tampering Warning

Safe Operation

Protective Clothing

Work Rules

Environment

Owner's Manual

IMPORTANT NOTES

Manufacturer Warranty, Implied Warranty

Fuel, Auxiliary Substances

Spare Parts, Technical Accessories

Service

Figures

Customer Service

VIEW OF VEHICLE

View of Vehicle, Front Left (Example)

View of Vehicle, Rear Right (Example)

SERIAL NUMBERS

Vehicle Identification Number

Type Label

Engine Number

Fork Article Number

Shock Absorber Article Number

CONTROLS

Clutch Lever

Hand Brake Lever

Throttle Grip

Stop Button

Opening the Fuel Tank Filler Cap

Closing the Fuel Tank Filler Cap

Fuel Tap

Choke

Shift Lever

Kick Starter Lever

Foot Brake Lever

Plug-in Stand

Service Hour Counter

PREPARING FOR USE

Advice on Preparing for First Use

Running in the Engine

RIDING INSTRUCTIONS

Checks and Maintenance Measures When Preparing for Use

Starting the Vehicle

Shifting, Riding

Applying the Brakes

Stopping, Parking

Transporting

Refueling

SERVICE SCHEDULE

Additional Information

Required Work

Recommended Work

TUNING THE CHASSIS

Checking the Basic Chassis Setting with Rider's Weight

Air Suspension XACT 5235

Compression Damping of the Shock Absorber

Adjusting the Low-Speed Compression Damping of the Shock Absorber

Adjusting the High-Speed Compression Damping of the Shock Absorber

Adjusting the Rebound Damping of the Shock Absorber

Measuring the Dimension of the Rear Wheel Unloaded

Checking the Static Sag of the Shock Absorber

Checking the Riding Sag of the Shock Absorber

Adjusting the Spring Preload of the Shock Absorber

Adjusting the Riding Sag

Checking the Basic Setting of the Fork