GAS GAS EX 300 2023 User Manual (English)

Questions and Answers:

M
marcusmarquezAug 6, 2025
Why won't my GAS GAS Motorcycle engine start but it turns over?
- C
  Charles EvansAug 6, 2025
  If your GAS GAS Motorcycle engine turns but doesn't start, several factors could be at play. It could be an operating error, so ensure you are following the correct start procedure. Check if the quick release coupling is properly joined. The idle speed might need adjustment. Also, verify that the fuel supply isn't interrupted, perhaps by checking the fuel tank breather. Examine the spark plug for soot or wetness, cleaning or replacing it as needed, and ensure the plug gap is correctly set to 0.6 mm (0.024 in). The ignition system, stop button, connector, or ignition coil may be defective, loose, or oxidized, so inspect and clean these components. If the issue persists, there may be a malfunction in the electronic fuel injection, requiring a diagnostic tool to read the fault memory.
M
Mercedes EllisonAug 10, 2025
What to do if my GAS GAS EX 300 2023 Motorcycle engine cannot be cranked (starter motor)?
- L
  lowerykariAug 10, 2025
  If the starter motor of your GAS GAS Motorcycle doesn't crank the engine, possible causes include an operating error (ensure you follow the correct start procedure). The 12-V battery might be discharged (charge it, and check the charging voltage, closed current, and alternator stator winding). A blown main fuse (replace it), a faulty starter relay (check it), or a faulty starter motor (check it) could also be the culprit.
T
Todd RamseyAug 19, 2025
What to do if GAS GAS Motorcycle engine overheats?
- M
  Michael BlakeAug 19, 2025
  If your GAS GAS Motorcycle engine overheats, it could be due to several reasons. There might be too little coolant in the cooling system (check for leakage and the coolant level). Insufficient air stream can also cause overheating (switch off the engine when stationary). Dirty radiator fins (clean the radiator fins) or foam formation in the cooling system (drain and refill with coolant) are other potential causes.
W
Warren AlvarezAug 23, 2025
Why does my GAS GAS EX 300 2023 engine die during the trip?
- L
  Lindsey AlvarezAug 23, 2025
  If your GAS GAS Motorcycle engine dies during a trip, consider these possible causes: lack of fuel (refuel), the engine taking in false air (check that the intake flange is firmly seated), a loose or oxidized connector or ignition coil (clean the connector and treat it with contact spray), or incorrectly stored ambient pressure (program ambient air pressure).
M
Melissa ValentineAug 27, 2025
How to fix no idle speed on my GAS GAS Motorcycle?
- J
  Jessica LeachAug 27, 2025
  If your GAS GAS Motorcycle engine has no idle speed, the spark plug may be defective (change the spark plug). The ignition system might also be defective (check the ignition coil and spark plug connector). Alternatively, the idle speed may simply need adjustment.
J
Jennifer RichardsAug 31, 2025
Why does my GAS GAS Motorcycle engine not speed up?
- P
  Paul SellersAug 31, 2025
  If your GAS GAS Motorcycle engine isn't speeding up, it could be due to a malfunction in the electronic fuel injection (read out the fault memory using the GAS- GAS Motorcycles diagnostics tool). A defective ignition system (check the ignition coil and spark plug connector) or incorrectly stored ambient pressure (program ambient air pressure) could also be the cause.

GAS GAS EX 300 2023 Specifications

General

Brand	GAS GAS
Model	EX 300 2023
Category	Motorcycle
Language	English

Summary

Safety Advice

Use Definition – Intended Use

Defines the intended use of the vehicle and its compliance with regulations.

Misuse

Explains what constitutes misuse of the vehicle and potential dangers.

Safety Advice

Provides general advice for safe operation and importance of warning labels.

Degrees of Risk and Symbols

Defines the risk levels (Danger, Warning, Caution, Note) and associated symbols.

Tampering Warning

Warns against tampering with the noise control system and lists prohibited acts.

Safe Operation

Provides instructions and warnings for safe operation, including fitness to ride.

Protective Clothing

Emphasizes the importance of wearing appropriate protective clothing.

Work Rules

Important Notes

Manufacturer Warranty, Implied Warranty

Service

Controls

Preparing for Use

Advice on Preparing for First Use

Provides essential safety advice and pre-ride checks before initial use.

Running in the Engine

Guides on how to properly run in the engine to ensure longevity.

Preparing the Vehicle for Difficult Operating Conditions

Preparing the Vehicle for Rides on Dry Sand

Preparing the Vehicle for Rides on Wet Sand

Preparing the Vehicle for Rides on Wet and Muddy Circuits

Preparing Vehicle for High Temperatures or Slow Riding

Preparing the Vehicle for Low Temperatures or Snow

Riding Instructions

Checks and Maintenance Measures When Preparing for Use

Lists essential pre-ride checks and maintenance tasks for safe operation.

Starting

Provides instructions and safety warnings for starting the engine.

Starting Off

Details the procedure for getting the motorcycle moving from a standstill.

Shifting, Riding

Explains shifting gears, riding techniques, and potential hazards.

Braking

Provides instructions and warnings for effective and safe braking.

Stopping, Parking

Details procedures and safety precautions for stopping and parking the motorcycle.

Refueling

Gives instructions and safety warnings for refueling the vehicle.

Adding 2-Stroke Oil

Service Schedule

Required Work

Lists essential maintenance tasks required at different operating hour intervals.

Recommended Work

Lists recommended maintenance tasks at various service intervals.

Tuning the Chassis

Checking the Basic Chassis Setting with the Rider's Weight

Explains how to set up the chassis based on rider weight for optimal handling.

Air Suspension XACT AER CC

Describes the air suspension system in the fork and its components.

Adjusting the Low-Speed Compression Damping of the Shock Absorber

Provides steps to adjust the low-speed compression damping on the shock absorber.

Adjusting the Rebound Damping of the Shock Absorber

Provides steps to adjust the rebound damping on the shock absorber.

Checking the Static Sag of the Shock Absorber

Details how to check the static sag of the rear shock absorber.

Checking the Riding Sag of the Shock Absorber

Details how to check the riding sag of the rear shock absorber.

Adjusting the Spring Preload of the Shock Absorber

Provides instructions for adjusting the spring preload on the shock absorber.

Adjusting the Fork Air Pressure

Provides instructions for adjusting the air pressure in the front fork.

Adjusting the Compression Damping of the Fork

Provides instructions for adjusting the compression damping on the front fork.

Adjusting the Rebound Damping of the Fork

Provides instructions for adjusting the rebound damping on the front fork.

Adjusting the Handlebar Position

Service Work on the Chassis

Bleeding the Fork Legs

Removing the Fork Legs

Installing the Fork Legs

Checking the Steering Head Bearing Play

Adjusting Steering Head Bearing Play

Removing the Shock Absorber

Installing the Shock Absorber

Removing the Air Filter

Cleaning the Air Filter and Air Filter Box

Installing the Air Filter

Removing the Fuel Tank

Installing the Fuel Tank

Cleaning the Chain

Checking the Chain Tension

Adjusting the Chain Tension

Provides instructions for adjusting the drive chain tension and rear wheel alignment.

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

Checking/Correcting the Fluid Level of Hydraulic Clutch

Changing the Hydraulic Clutch Fluid

Brake System

Checking the Free Travel of the Hand Brake Lever

Adjusting the Basic Position of the Hand Brake Lever

Checking the Brake Discs

Checking the Front Brake Fluid Level

Details how to check the front brake fluid level.

Adding Front Brake Fluid

Provides instructions for adding front brake fluid.

Checking the Front Brake Linings

Changing the Brake Linings of the Front Brake

Provides instructions for changing the front brake linings.

Checking the Free Travel of Foot Brake Lever

Adjusting the Basic Position of the Foot Brake Lever

Checking the Rear Brake Fluid Level

Details how to check the rear brake fluid level.

Adding Rear Brake Fluid

Provides instructions for adding rear brake fluid.

Checking the Brake Linings of the Rear Brake

Changing the Rear Brake Linings

Provides instructions for changing the rear brake linings.

Wheels, Tires

Removing the Front Wheel

Installing the Front Wheel

Removing the Rear Wheel

Installing the Rear Wheel

Checking the Tire Condition

Checking Tire Pressure

Electrical System

Charging the 12-V Battery

Changing Main Fuse

Changing the Fuses of Individual Electrical Power Consumers

Cooling System

Checking the Antifreeze and Coolant Level

Explains how to check antifreeze and coolant levels, with safety warnings.

Checking the Coolant Level

Details how to check the coolant level in the radiator.

Draining the Coolant

Refilling with Coolant

Changing the Coolant

Tuning the Engine

Adjusting the Characteristic Map of the Throttle Response

Explains how to change the throttle response by swapping guide plates.

Adjusting the Idle Speed

Changing the Ignition Timing Map

Adjusting the Basic Position of the Shift Lever

Service Work on the Engine

Changing the Fuel Screen

Checking 2-Stroke Oil Level

Priming Oil Pump

Cleaning the Oil Screen in the Oil Tank

Changing the Gear Oil

Adding the Gear Oil

Cleaning, Care

Troubleshooting

The Engine Cannot Be Cranked (Starter Motor)

Addresses issues related to the engine not starting or cranking.

The Engine Turns but Does Not Start

Addresses issues when the engine cranks but fails to start.

The Engine Has No Idle Speed

Addresses issues with the engine not maintaining idle speed.

Engine Does Not Speed Up

Addresses issues when the engine fails to accelerate properly.

Engine Has Too Little Power

Addresses issues where the engine lacks power.

The Engine Dies During the Trip

Addresses issues causing the engine to stop while riding.

Engine Overheats

Addresses issues related to engine overheating.

White Smoke Emission (Steam in Exhaust Gas)

Water in the Gear Oil

Blink Code

Malfunction Indicator Lamp Code 14

Explains malfunction indicator lamp code 14 and its error conditions.

Malfunction Indicator Lamp Code 09

Explains malfunction indicator lamp code 09 and its error conditions.

Malfunction Indicator Lamp Code 13

Explains malfunction indicator lamp code 13 and its error conditions.

Malfunction Indicator Lamp Code 12

Explains malfunction indicator lamp code 12 and its error conditions.

Malfunction Indicator Lamp Code 06

Explains malfunction indicator lamp code 06 and its error conditions.

Malfunction Indicator Lamp Code 41

Explains malfunction indicator lamp code 41 and its error conditions.

Malfunction Indicator Lamp Code 33

Explains malfunction indicator lamp code 33 and its error conditions.

Malfunction Indicator Lamp Code 34

Explains malfunction indicator lamp code 34 and its error conditions.

Malfunction Indicator Lamp Code 37

Explains malfunction indicator lamp code 37 and its error conditions.

Malfunction Indicator Lamp Code 02

Explains malfunction indicator lamp code 02 and its error conditions.

Malfunction Indicator Lamp Code 42

Explains malfunction indicator lamp code 42 and its error conditions.

Malfunction Indicator Lamp Code 21

Explains malfunction indicator lamp code 21 and its error conditions.

Malfunction Indicator Lamp Lights Up

Explains the condition where the malfunction indicator lamp is constantly lit.

Technical Data

Engine Tightening Torques

Fork

Shock Absorber

Chassis Tightening Torques

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GAS GAS EX 300 2023 User Manual

Table of Contents

Questions and Answers:

GAS GAS EX 300 2023 Specifications

Summary

Safety Advice

Use Definition – Intended Use

Misuse

Safety Advice

Degrees of Risk and Symbols

Tampering Warning

Safe Operation

Protective Clothing

Work Rules

Important Notes

Manufacturer Warranty, Implied Warranty

Service

Controls

Preparing for Use

Advice on Preparing for First Use

Running in the Engine

Preparing the Vehicle for Difficult Operating Conditions

Preparing the Vehicle for Rides on Dry Sand

Preparing the Vehicle for Rides on Wet Sand

Preparing the Vehicle for Rides on Wet and Muddy Circuits

Preparing Vehicle for High Temperatures or Slow Riding

Preparing the Vehicle for Low Temperatures or Snow

Riding Instructions

Checks and Maintenance Measures When Preparing for Use

Starting

Starting Off

Shifting, Riding

Braking

Stopping, Parking

Refueling

Adding 2-Stroke Oil

Service Schedule

Required Work

Recommended Work

Tuning the Chassis

Checking the Basic Chassis Setting with the Rider's Weight

Air Suspension XACT AER CC

Adjusting the Low-Speed Compression Damping of the Shock Absorber

Adjusting the Rebound Damping of the Shock Absorber

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 Fork Air Pressure

Adjusting the Compression Damping of the Fork

Adjusting the Rebound Damping of the Fork

Adjusting the Handlebar Position

Service Work on the Chassis

Bleeding the Fork Legs

Removing the Fork Legs

Installing the Fork Legs

Checking the Steering Head Bearing Play

Adjusting Steering Head Bearing Play

Removing the Shock Absorber

Installing the Shock Absorber

Removing the Air Filter

Cleaning the Air Filter and Air Filter Box

Installing the Air Filter

Removing the Fuel Tank

Installing the Fuel Tank

Cleaning the Chain

Checking the Chain Tension

Adjusting the Chain Tension

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

Checking/Correcting the Fluid Level of Hydraulic Clutch

Changing the Hydraulic Clutch Fluid

Brake System

Checking the Free Travel of the Hand Brake Lever

Adjusting the Basic Position of the Hand Brake Lever

Checking the Brake Discs

Checking the Front Brake Fluid Level

Adding Front Brake Fluid

Checking the Front Brake Linings

Changing the Brake Linings of the Front Brake

Checking the Free Travel of Foot Brake Lever

Adjusting the Basic Position of the Foot Brake Lever