Dinli DMX 450 - User Manual

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1

Dear Dinli Quad Users:

Before the delivery of each new vehicle from Dinli factory, the fuel in carburetor is drained off to ensure the

excellent performance and safety of the vehicle. Therefore, when first starting a new vehicle, it is normal to take

20~30 seconds. The quality of each Dinli Quad is guaranteed. Study this manual thoroughly and enjoy your riding

Dinli Quad.

I. PREFACE

WARNING

STOP! If you have the impression that four wheels give you the stability of a car, you are wrong. If you

have the impression that a quad is simple to drive and similar to those other vehicles, that you are

wrong. The risks involved are at least equal to those faced when riding a motorcycle.

!

Table of Contents

Questions and Answers

S
Samuel BrooksAug 14, 2025
Why my Dinli Offroad Vehicle engine turns over but won't start?
- M
  Mr. Tyler YangAug 14, 2025
  If the engine of your Dinli Offroad Vehicle turns over but doesn't start, or is hard to start, it could be due to several reasons. It might be caused by fuel deterioration or water in the fuel, in which case you should drain the old fuel and replace it with fresh fuel. Make sure there is fuel in the tank, and if not, turn the fuel valve to reserve and refuel. Inspect the spark plug for fouling or defects, and replace it if needed. Low battery voltage or loose/corroded terminals can also be a cause, so charge and/or clean the battery. Check for spark at the spark plug and verify the switch is on. Also, overuse of the choke can cause this issue, so inspect, clean, and/or replace the spark plug.
K
Kristin PowellAug 17, 2025
How to troubleshoot lack of power in Dinli DMX 450 Offroad Vehicle engine?
- T
  Tammy HammondAug 18, 2025
  If your Dinli Offroad Vehicle engine lacks power, several factors could be the cause. Check if the throttle body air boots are loose or damaged and tighten them. Replace a faulty or incorrectly gapped spark plug. Also, a faulty ignition coil can cause this issue, so replace it. Clean or replace a clogged fuel filter. Replace deteriorated or contaminated fuel. If none of these solve the problem, the fuel pump might be faulty, requiring repair or replacement.
T
Teresa LewisAug 21, 2025
What to do if my Dinli Offroad Vehicle engine stalls?
- W
  wpenaAug 21, 2025
  If your Dinli Offroad Vehicle engine stalls, it could be due to several reasons. Fuel deterioration can cause this, so drain the old fuel and refill with fresh fuel. A fouled or defective spark plug can also be the culprit, so replace it. Additionally, a clogged fuel hose or air filter can lead to stalling, so clean or replace them. Check all ignition connections and tighten any loose ones.
K
kathygordonAug 25, 2025
Why Dinli DMX 450 engine will not turn over?
- L
  leejacquelineAug 25, 2025
  If your Dinli Offroad Vehicle engine will not turn over, it could be due to a few reasons. Check if the battery voltage is low or the terminals are loose; if so, charge the battery or secure the terminals. Another reason could be a blown fuse, which you should replace. Also, ensure the ignition is in the “ON” position.
T
torresnicoleAug 28, 2025
How to fix overheating in Dinli DMX 450 Offroad Vehicle?
- A
  Allison ThompsonAug 28, 2025
  Overheating in your Dinli Offroad Vehicle can occur due to a few reasons. Debris lodged in the screen can cause overheating, so remove and clean the screen. Also, check for a low coolant level and add coolant if needed. A coolant leak in the engine could also be the cause, so tighten any loose connections.
M
Mark MoodyAug 31, 2025
Why does my Dinli DMX 450 Offroad Vehicle engine start hard when hot?
- H
  holmesbillyAug 31, 2025
  If your Dinli Offroad Vehicle engine starts hard when hot, it could be due to a clogged air filter, so clean or replace it. A corroded battery terminal can also cause this, so clean it. Additionally, a fouled spark plug can be the issue, so replace it. Lastly, a faulty solenoid may be the cause, so test or replace it.
R
Rachel ColonSep 3, 2025
What causes engine pinging in Dinli Offroad Vehicle?
- K
  Kristopher WoodSep 3, 2025
  If your Dinli Offroad Vehicle engine pings or knocks, it could be due to poor quality or low octane fuel. Replace the fuel with the recommended type.
R
robertjohnsonSep 7, 2025
How to stop Dinli DMX 450 Offroad Vehicle engine from backfiring?
- J
  Jacob PaulSep 7, 2025
  If your Dinli Offroad Vehicle engine backfires, it could be due to a weak, fouled, or defective spark plug. Inspect the spark plug, clean it if necessary, or replace it. Also, check for an incorrect spark plug gap or heat range, and set the gap to the correct specifications or replace the plug.
D
Darryl BradleySep 12, 2025
What causes spark plug fouling repeatedly in Dinli Offroad Vehicle?
- K
  Keith FletcherSep 12, 2025
  If the spark plug in your Dinli Offroad Vehicle fouls repeatedly, inspect the fuel return line for blockages. Also, the issue might be related to an incorrect calibration file, which would need to be replaced. Another potential cause is corroded battery terminals, which should be cleaned.

Summary

II. INTRODUCTION

Safety Alerts

Alerts on serious injury or death if warnings are not followed.

III. IMPORTANT SAFETY MESSAGE

Quad Hazards and Operation

Quad is hazardous and handles differently from other vehicles.

3. PARTS AND CONTROL FUNCTIONS

Control Levers and Pedals

Identification of clutch, brake, throttle levers and pedals.

Handlebar Controls and Switches

4. SAFE OPERATION

Rider Experience Requirements

Warning that ATVs require skilled operators with experience.

Safe Riding Practices

Guidelines for safe riding, age restrictions, and speed.

5. PRE-RIDE INSPECTION

Pre-Ride Checklist

Comprehensive checklist for pre-ride inspection of the quad.

6. OPERATION

Starting Procedures

Break-In and Shifting

7. MAINTENANCE & ADJUSTMENT

Maintenance Overview and Safety

Importance of maintenance, safety precautions, and dealer consultation.

Work Safely

Hazards like carbon monoxide, hot components, gasoline, fluids, and moving parts.

Maintenance Schedule

Schedule for regular maintenance based on time and mileage.

Cooling System Maintenance

Brake System Maintenance

System test, fluid types, hand/foot brake, parking brake checks.

Electrical System Maintenance

8. CLEANING

9. STORAGE

10. TRANSPORTING

11. TROUBLESHOOTING

Engine Start and Performance Issues

Troubleshooting for engine start problems, hard starting, lack of power.

Ignition and Stalling Issues

Diagnosing spark plug fouling, engine stalling, overheating, and abnormal operation.

12. MODEL SPECIFICATION

13. QUAD LIMITED WARRANTY

Warranty Conditions and Period

Covered and Non-Covered Parts;Labor

Warranty Limitations

14. MAINTENANCE RECORD

Summary

II. INTRODUCTION

Safety Alerts

Alerts on serious injury or death if warnings are not followed.

III. IMPORTANT SAFETY MESSAGE

Quad Hazards and Operation

Quad is hazardous and handles differently from other vehicles.

3. PARTS AND CONTROL FUNCTIONS

Control Levers and Pedals

Identification of clutch, brake, throttle levers and pedals.

Handlebar Controls and Switches

4. SAFE OPERATION

Rider Experience Requirements

Warning that ATVs require skilled operators with experience.

Safe Riding Practices

Guidelines for safe riding, age restrictions, and speed.

5. PRE-RIDE INSPECTION

Pre-Ride Checklist

Comprehensive checklist for pre-ride inspection of the quad.

6. OPERATION

Starting Procedures

Break-In and Shifting

7. MAINTENANCE & ADJUSTMENT

Maintenance Overview and Safety

Importance of maintenance, safety precautions, and dealer consultation.

Work Safely

Hazards like carbon monoxide, hot components, gasoline, fluids, and moving parts.

Maintenance Schedule

Schedule for regular maintenance based on time and mileage.

Cooling System Maintenance

Brake System Maintenance

System test, fluid types, hand/foot brake, parking brake checks.

Electrical System Maintenance

8. CLEANING

9. STORAGE

10. TRANSPORTING

11. TROUBLESHOOTING

Engine Start and Performance Issues

Troubleshooting for engine start problems, hard starting, lack of power.

Ignition and Stalling Issues

Diagnosing spark plug fouling, engine stalling, overheating, and abnormal operation.

12. MODEL SPECIFICATION

13. QUAD LIMITED WARRANTY

Warranty Conditions and Period

Covered and Non-Covered Parts;Labor

Warranty Limitations

14. MAINTENANCE RECORD

Dinli DMX 450 Specifications

General

Brand	Dinli
Model	DMX 450
Category	Offroad Vehicle
Language	English

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