Husqvarna TX 300i 2021 - User Manual

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OWNER'S MANUAL 2021

TX 300i

Art. no. 3402441en

Main Page

Questions and Answers

W
William HerringAug 5, 2025
Why does my Husqvarna TX 300i 2021 engine have too little power?
- S
  Stefanie WilliamsAug 5, 2025
  If your Husqvarna Motorcycle's engine has too little power, it could be due to an error in the electronic fuel injection system. Use the Husqvarna Motorcycles diagnostics tool to read the fault memory. Another potential cause is an interruption in the fuel supply; in this case, inspect the fuel tank breather. Also, verify the exhaust system for any damage, such as leaks or deformation, and ensure the main silencer has the correct amount of glass fiber yarn filling. The ignition system might be defective, so check the ignition coil. Inspect the diaphragm and reed valve housing for damage. Finally, ensure that the ambient pressure is correctly stored; if not, program the ambient pressure.
K
Kelly WallaceAug 19, 2025
What to do if Husqvarna TX 300i 2021 engine has too little power because of exhaust system?
- R
  Richard CrosbySep 12, 2025
  If the engine of your Husqvarna Motorcycle has too little power, it might be caused by a leaky or deformed exhaust system, or if there's too little glass fiber yarn filling in the main silencer. To resolve this, check the exhaust system for any signs of damage.

Summary

Document Conventions

Symbols Used

Explains the meaning of various symbols used in the manual.

Formats Used

Describes typographical conventions like proprietary names and underlined terms.

Safety Advice

Intended Use and Misuse

Defines the proper and improper uses of the vehicle.

Risk Degrees and Symbols

Details safety warnings based on risk level (Danger, Warning, Caution, Note).

General Safety Information

Provides essential safety instructions for operating the vehicle.

Safe Operation and Warnings

Tampering Warning

Prohibits modifications to the noise control system and related acts.

Safe Riding Practices

Covers rider fitness, environmental considerations, and vehicle condition.

Protective Clothing

Emphasizes the importance of wearing appropriate safety gear.

Work Rules and Environment

Outlines rules for performing work and environmental responsibility.

Important Notes

Manufacturer Warranty

Details warranty conditions, service requirements, and voiding clauses.

Fuel and Auxiliary Substances

Advises on proper use and handling of fuel and other fluids.

Service and Parts

Covers service schedule adherence and use of approved spare parts.

Customer Service

Provides information on contacting dealers for support and information.

View of Vehicle

Front Left View

Identifies key components from the front left side of the motorcycle.

Rear Right View

Identifies key components from the rear right side of the motorcycle.

Vehicle Identification Numbers

VIN, Type Label, Engine Number

Locates and describes how to find the VIN, type label, and engine number.

Fork and Shock Absorber Numbers

Explains the location of fork and shock absorber part numbers.

Motorcycle Controls

Handlebar Controls

Details the clutch lever, hand brake lever, and throttle grip functions.

Switches and Buttons

Explains the operation of the switch-off button and start button.

Indicator Lamps and Fuel Caps

Describes indicator lamp meanings and fuel tank cap operations.

Operating Motorcycle Controls

Oil Tank Caps and Cold Start

Covers 2-stroke oil tank cap operations and the cold start button function.

Idle Speed and Shift Lever

Explains idle speed adjustment and shift lever operation.

Foot Brake, Side Stand, Service Counter

Details foot brake lever, side stand, and service hour counter functions.

Preparing for Use

First Use Advice

Crucial safety and operational guidance before the first ride.

Riding Conditions

Prepares the vehicle for specific difficult riding conditions.

Engine Break-in and Battery

Guides on engine break-in procedures and lithium-ion battery behavior.

Preparing for Use (Continued)

Difficult Conditions: Sand

Specific preparations for riding on dry and wet sand surfaces.

Difficult Conditions: Wet;Mud

Preparations for riding on wet and muddy circuits.

Difficult Conditions: Heat;Low Temp

Advice for riding in high temperatures or low temperatures/snow.

Riding the Motorcycle

Pre-Ride Checks

Essential checks and maintenance before every trip for safe operation.

Starting and Moving Off

Step-by-step guide for starting the engine and moving the vehicle.

Shifting and Braking

Instructions on gear shifting and proper brake application.

Stopping, Parking, Transporting

Guidance on safe stopping, parking, and transporting the motorcycle.

Maintenance Service Schedule

Additional Information

Notes on service intervals, variations, and dealer network information.

Required Work

Lists mandatory maintenance tasks at specific operating hour intervals.

Recommended Work

Outlines recommended maintenance tasks at specified intervals or months.

Chassis Tuning Procedures

Basic Chassis Setting & Air Suspension

Adjusting suspension for rider weight and understanding air suspension.

Shock Absorber Damping

Guides on adjusting low-speed and high-speed compression damping.

Sag Measurement

Procedures for checking static and riding sag of the shock absorber.

Spring Preload and Fork Settings

Adjusting spring preload, fork air pressure, and damping.

Chassis Service Procedures

Fork Maintenance

Procedures for bleeding fork legs and cleaning dust boots.

Fork Leg Removal;Installation

Step-by-step guide for removing and installing front fork legs.

Triple Clamp Service

Instructions for removing and installing the lower triple clamp.

Steering Head Bearing

How to check, adjust, and lubricate the steering head bearing.

Chassis Component Service

Number Plates and Fenders

Procedures for removing and installing front fender and number plate.

Shock Absorber Removal;Installation

Detailed steps for removing and installing the rear shock absorber.

Seat and Air Filter Box

Covers seat mounting and air filter box cover removal/installation.

Air Filter Maintenance

Steps for removing, cleaning, and installing the air filter.

Chassis System Maintenance

Main Silencer Maintenance

Procedures for removing, installing, and changing main silencer filling.

Side Cover and Fuel Tank

Steps for removing/installing side covers and the fuel tank.

Fuel Tank Installation

Guidance on properly installing the fuel tank.

Chain Maintenance

Covers checking chain for dirt, cleaning, and adjusting tension.

Chassis Component Checks

Chain and Sprocket Wear

Checks for wear on the chain, sprockets, and chain guide.

Chain Sliding Guards;Guides

Procedures for checking and replacing chain sliding guards and pieces.

Frame and Link Fork Checks

Inspecting the frame and link fork for damage or deformation.

Throttle Cable and Grips

Checking throttle cable routing and rubber grip condition.

Chassis Adjustments and Checks

Clutch Adjustment and Fluid

Adjusting clutch lever position and servicing hydraulic clutch fluid.

Brake System Operations

Hand Brake Lever Adjustment

Adjusting the hand brake lever's basic position for rider comfort.

Brake Disc Checks

Instructions for checking front and rear brake disc thickness and condition.

Front Brake Fluid Level

Guidance on checking and adding front brake fluid.

Front Brake Linings

Procedures for checking and changing front brake linings.

Brake System Maintenance

Front Brake Lining Change

Step-by-step instructions for replacing front brake linings.

Rear Brake Fluid Level

Guidance on checking and adding rear brake fluid.

Rear Brake Linings

Procedures for checking and changing rear brake linings.

Foot Brake Lever Travel

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

Brake System Checks

Foot Brake Lever Adjustment

Adjusting the foot brake lever's basic position for rider preference.

Rear Brake Fluid and Linings

Checking rear brake fluid level and rear brake lining condition.

Rear Brake Lining Change

Detailed steps for replacing rear brake linings.

Wheels and Tire Service

Front Wheel Service

Procedures for removing and installing the front wheel.

Rear Wheel Service

Procedures for removing and installing the rear wheel.

Tire Condition and Pressure

Checking tire wear, age, and maintaining correct pressure.

Spoke Tension

How to check and correct spoke tension for wheel integrity.

Electrical System Maintenance

12-V Battery Service

Steps for removing, installing, and charging the 12-V battery.

Fuses and Diagnostics

Procedures for changing fuses and accessing diagnostic connector.

Cooling System Service

System Overview and Coolant Level Check

Explains the cooling system and how to check coolant and antifreeze levels.

Coolant Draining and Refilling

Procedures for draining old coolant and refilling with new coolant.

Coolant Change

Detailed steps for completely changing the motorcycle's coolant.

Engine Tuning Procedures

Throttle Cable Adjustment

Adjusting throttle cable play for optimal response and safety.

Throttle Response Map

Changing the guide plate to alter throttle response characteristics.

Idle Speed Adjustment

Procedures for adjusting the engine's idle speed.

Ambient Pressure and Shift Lever

Programming ambient pressure and checking shift lever position.

Engine Service Procedures

Fuel System Service

Instructions for changing the fuel screen for optimal fuel delivery.

2-Stroke Oil System

Guidance on checking 2-stroke oil level and priming the oil pump.

Oil Screen and Gear Oil

Steps for cleaning the oil screen and checking gear oil level.

Gear Oil Change

Procedures for draining and refilling the engine's gear oil.

Motorcycle Cleaning and Care

Motorcycle Cleaning Procedures

Best practices for cleaning the motorcycle to maintain its condition.

Motorcycle Storage Guidelines

Storing the Motorcycle

Steps and recommendations for long-term motorcycle storage.

Preparing for Use After Storage

Procedures for getting the motorcycle ready after a storage period.

Troubleshooting Engine Issues

Engine Starting Issues

Common causes and solutions for the engine not cranking or starting.

Engine Performance Issues

Diagnosing and resolving problems with engine power and idle speed.

Overheating and Smoke

Identifying causes of engine overheating and white smoke emission.

Diagnostic Blink Codes

Malfunction Indicator Lamp Codes

Table of blink codes and corresponding error conditions.

Error Level Conditions

Details specific sensor inputs and circuit faults indicated by blink codes.

Technical Specifications

Engine Specifications

Key engine parameters including displacement, bore, stroke, and ratios.

Chassis Specifications

Technical details of the frame, fork, shock absorber, and brakes.

Electrical System and Tires

Specifications for the battery, fuses, and tire types.

Fork and Shock Absorber

Details on fork and shock absorber settings and capacities.

Fluid and Substance Specifications

Brake Fluid, Coolant, Engine Oil

Specifies approved types and standards for fluids used in the motorcycle.

Recommended Auxiliary Substances

Cleaners and Lubricants

Lists recommended cleaners, lubricants, and greases for maintenance.

Sprays and Greases

Recommends specific sprays and greases for various applications.

Industry Standards Explained

JASO, SAE, JASO FD

Explains industry standards for engine oils and their significance.

Special Terms Glossary

Definitions

Provides definitions for technical terms used in the manual.

List of Abbreviations

Common Abbreviations

Lists common abbreviations used throughout the manual.

Symbol Guide

Red Symbols

Indicates symbols signifying immediate intervention requirements.

Yellow;Orange Symbols

Indicates symbols for prompt intervention and active driving aids.

Document Index

Alphabetical Index

Provides an alphabetical reference to topics within the manual.