How To Start A Quad Bike When It's Not Starting

Published: 28.4.23

Updated: 30.7.24

So, your quad bike won't start, and you're not sure where to begin? Don't panic!

There could be many reasons for this issue, ranging from a dead battery to an obstructed air filter.

In this article, we'll guide you through the steps to help you diagnose and resolve the problem, so you can get back to enjoying your ATV in no time.

Why Won't My Quad Start With Electric Start?

Understanding why a quad won't start with electric start involves checking several factors.

Initially, ensure the ATV has sufficient fuel, air, spark, and battery power, as deficiencies in any of these can prevent startup.

If these factors are confirmed, potential electrical issues could be the culprit, including problems with the kill switch or the starter solenoid.

Finally, mechanical issues such as a clogged carburetor or a faulty ignition coil may also impede the starting process.

Seek professional help if the problem persists despite these checks.

Checking the Battery

Testing the Battery Voltage

Begin by inspecting the battery. Using a multimeter, check the battery voltage to ensure it's above 12 volts.

If the voltage is low, try charging the battery and testing it again.

Inspecting the Battery Connections

Check for any loose or corroded connections on the battery terminals.

Clean any corrosion and tighten loose connections to ensure proper contact.

Inspecting the Spark

If you're struggling to start your quad without a pull cord, this article "How To Start A Quad Without Pull Start" may help.

Examining the Fuel System

A well-maintained fuel system is crucial for your quad bike's performance.

This section covers how to inspect and maintain your fuel system, as well as guidance on choosing the right fuel in the UK.

Ensuring Fuel Flow

1. Check Fuel Level: Ensure there's sufficient fuel in the tank.
2. Inspect Fuel Lines: Look for cracks, kinks, or loose connections.
3. Test Fuel Flow:
   • Carefully disconnect the fuel line from the carburetor or fuel injector.
   • Place the end of the fuel line in a safe container.
   • Have someone crank the engine briefly.
   • Observe if fuel flows freely from the line.

Checking for Fuel Blockages

1. Examine the Fuel Filter:
   • Locate the fuel filter (consult your manual for its position).
   • Check for visible clogs or damage.
   • Replace if necessary, following manufacturer guidelines.
2. Inspect Fuel Lines:
   • Look for pinched or kinked sections.
   • Straighten any bends or replace damaged lines.
3. Clean the Carburetor (if applicable):
   • Remove and disassemble the carburetor carefully.
   • Clean all jets and passages with carburetor cleaner.
   • Reassemble and reinstall, ensuring proper settings.

Suitable Fuel Types for Quad Bikes in the UK

As of 2021, the UK has introduced E10 fuel as the standard grade petrol.

Here's what you need to know:

1. E10 Fuel:

   • Contains up to 10% renewable ethanol.
   • Suitable for most modern quad bikes manufactured after 2000.
   • Check your owner's manual or manufacturer's website for compatibility.

2. Super Unleaded (E5):

   • Still available at many forecourts.
   • Contains up to 5% ethanol.
   • Recommended for older quad bikes or those not compatible with E10.

3. Octane Rating:

   • Most quad bikes run on standard 95 RON (E10) petrol.
   • Some high-performance models may require higher octane fuel.

4. Ethanol Content:

   • Avoid using fuels with more than 10% ethanol unless specified by the manufacturer.

Fuel System Maintenance Tips

• Replace the Fuel Filter: According to the manufacturer's schedule.
• Maintain Fuel Levels: Keep the fuel tank at least 1/4 full to prevent condensation.
• Regular Engine Use: Run the engine regularly to prevent fuel from becoming stale.
• Use Fuel Stabilizer: If storing the quad bike for extended periods, add a fuel stabilizer.
• Drain the Fuel System: For long-term storage, consider draining the fuel system completely.

UK-Specific Considerations

• E10 Fuel Degradation: Be aware that E10 fuel can degrade more quickly than traditional petrol, especially in infrequently used vehicles.
• Incompatibility with E10: If your quad bike is incompatible with E10, look for the 'Super' grade fuel at petrol stations, which will remain E5.
• Fuel Economy: Keep an eye on fuel economy, as E10 can slightly reduce fuel efficiency in some vehicles.

By properly maintaining your quad bike's fuel system and using the correct fuel type, you can ensure optimal performance and prevent many common starting issues.

Always consult your owner's manual for specific recommendations tailored to your quad bike model, and stay informed about any changes in UK fuel regulations that may affect your vehicle.

Verifying Air Flow

Proper air flow is crucial for your quad bike's performance and starting.

This section covers how to inspect, clean, and maintain your air intake system.

Inspecting the Air Filter

1. Locate the air filter: Consult your quad bike's manual to find the air filter housing.
2. Remove the air filter: Carefully take out the filter, noting its orientation.
3. Examine the filter:
   • Look for dirt, debris, or oil buildup.
   • Check for tears or damage to the filter material.
4. Clean or replace the filter:
   • For foam filters: Wash with warm, soapy water, rinse thoroughly, and allow to dry completely.
   • For paper filters: Gently tap out dirt or replace if heavily soiled.
   • Always replace damaged filters.

Cleaning the Air Intake System

1. Remove the air filter housing:
   • Disconnect any sensors or hoses.
   • Unscrew and carefully remove the housing.
2. Clean the housing:
   • Use a clean cloth to wipe out any dirt or debris.
   • For stubborn grime, use a mild degreaser and soft brush.
3. Inspect the intake tube:
   • Look for cracks, loose clamps, or debris.
   • Clean the tube using a long-handled brush and vacuum.
4. Check the airbox:
   • Remove any accumulated dirt or debris.
   • Ensure drain holes are clear and functioning.
5. Reassemble carefully:
   • Ensure all seals and gaskets are properly seated.
   • Reconnect all sensors and hoses securely.

Checking for Obstructions

1. Inspect the entire air intake path:
   • Look for leaves, twigs, or other debris that may have entered.
   • Check for any signs of rodent nests or damage.
2. Clean thoroughly:
   • Use compressed air to blow out any loose debris.
   • For hard-to-reach areas, use a flexible inspection camera.
3. Verify clear airflow:
   • With the engine off, place your hand over the intake.
   • Have someone crank the engine briefly.
   • You should feel a strong suction.

Maintenance Tips

• Regularly clean or replace your air filter: Every 20-50 hours of operation, or more frequently in dusty conditions.
• Use the correct filter: Always use the correct type and size of filter for your quad bike model.
• Consider using a pre-filter or outerwear: In extremely dusty environments to extend the life of the main filter.
• Inspect the entire air intake system regularly: Check for signs of wear or damage, and ensure it is free from obstructions.

By maintaining a clean and unobstructed air intake system, you ensure your quad bike receives the proper air flow for optimal performance and easy starting.

Remember, a well-maintained air system not only improves engine efficiency but also extends the life of your quad bike's engine.

Related: Keyless Ignition: A Guide on How to Start a Quad Without a Key

Evaluating Engine Compression

Performing a Compression Test

Conduct a compression test to measure the pressure within the engine's cylinders.

Low compression could indicate a problem with the piston rings, valves or cylinder head.

Identifying Compression Issues

If the compression test reveals low pressure, further investigation is required to identify the cause.

This may involve disassembling the engine to examine the internal components.

Assessing Old Petrol in Tank

Identifying Stale Petrol

Old or stale petrol can cause starting issues. If your quad bike has been sitting for an extended period, the petrol may have degraded.

Stale petrol has a sour or varnish-like smell.

Draining and Replacing Petrol

Drain the old petrol from the tank and replace it with fresh petrol. This should help eliminate any issues related to degraded fuel.

Related: Do Diesel-Powered Go-Karts Exist? (IS IT A MYTH?)

Confirming ATV is Not in Gear

Shifting to Neutral

Ensure that the quad bike is in neutral before attempting to start it. Most ATVs won't start if they are in gear.

Understanding Gear Indicators

Check the gear indicator on your quad bike's dashboard to verify that it is in neutral.

If the indicator is not functioning correctly, consult the owner's manual for guidance.

Disengaging the Kill Switch

Locating the Kill Switch

The kill switch is a safety feature that prevents the engine from starting.

Locate the kill switch on your ATV, usually found on the handlebars or near the ignition.

Ensuring Proper Function

Ensure the kill switch is in the "run" or "off" position. If it's engaged, the engine will not start.

Checking for Dead ATV Battery

Recognising Symptoms

A dead battery may be the cause of your starting issues.

Symptoms of a dead battery include a weak or non-existent electrical system, dimming lights, or a clicking sound when attempting to start the engine.

Charging or Replacing the Battery

If the battery is dead, charge it using an appropriate charger. If the battery still does not hold a charge, replace it with a new one.

Testing the ATV Solenoid

Listening for the Click

When attempting to start the quad bike, listen for a clicking sound near the solenoid. If you hear the click, the solenoid is likely functioning correctly.

Multimeter Testing

If you don't hear the click, use a multimeter to test the solenoid for proper voltage.

If the voltage is low or non-existent, the solenoid may need to be replaced.

Determining Fuel Delivery to Engine

Inspecting the Carburettor

If your ATV has a carburettor, ensure that fuel is reaching the engine by checking for a wet spark plug after cranking the engine.

If the plug is dry, the carburettor may require cleaning or adjustment.

Troubleshooting Fuel Injection

For fuel-injected ATVs, use a diagnostic tool to check for any error codes that may indicate a problem with the fuel injection system.

Consult the owner's manual for guidance on interpreting and resolving these codes.

Evaluating the Spark in the Engine

Testing the Ignition Coil

Using a multimeter, test the ignition coil for proper resistance. If the resistance is outside the specified range, the ignition coil may need to be replaced.

Inspecting the Spark Plug Wire

Examine the spark plug wire for any signs of 

damage, wear or corrosion. A damaged wire can result in a weak or non-existent spark. Replace the wire if necessary.

Professional Help and Resources

While DIY maintenance can keep your quad bike running smoothly, there are times when professional assistance becomes necessary.

Knowing when to seek expert help and where to find reliable resources is crucial for every quad bike owner.

When to Seek Professional Help

Consider consulting a professional mechanic in the following situations:

1. Complex engine or transmission issues
2. Electrical system failures
3. Persistent problems that DIY efforts haven't resolved
4. Major accident repairs
5. When you lack the necessary tools or expertise for a specific repair

Reputable Service Centers

While local options may vary, here are some general tips for finding reputable quad bike service centres:

1. Look for certified technicians with experience in ATV and quad bike repairs.
2. Check online reviews and ratings from previous customers.
3. Ask for recommendations from local quad bike clubs or enthusiasts.
4. Ensure the service center uses quality parts and offers warranties on their work.

Some reputable service centers in the UK include:

• The Quad Bike Warehouse (West Midlands)
• Beckside Machinery
• The FastFit Centre (North West)
• Rattray ATV (Scotland)

Online Resources for Further Reading

To expand your knowledge on quad bike maintenance and repairs, consider these valuable online resources:

1. Haynes Manuals: Offers comprehensive ATV repair manuals with step-by-step instructions and detailed illustrations.

2. RiiRoo Guides: Provides detailed articles on quad bike maintenance, including a step-by-step guide on servicing your quad bike at home.

3. Beckside Machinery Blog: Offers essential quad bike maintenance tips and checklists for routine care.

4. Farming UK: Provides practical advice on maintaining your quad bike and keeping it running smoothly.

5. Airtasker: A platform where you can find local quad bike repair experts in the UK.

Remember, while these resources can greatly enhance your understanding of quad bike maintenance, always prioritise safety.

If you're unsure about performing a repair or maintenance task, it's best to consult with a professional mechanic to ensure your quad bike remains safe and reliable for all your adventures.

User Testimonials and Tips

Real-life experiences from quad bike enthusiasts offer valuable insights into common issues and creative solutions.

Here are some user testimonials and tips to help you troubleshoot your ATV more effectively.

Battling Battery Blues

Sarah from Yorkshire shares: "My quad wouldn't start with the electric start, and I was ready to call it quits. Then I remembered to check the kill switch – it was engaged! A simple flip, and she roared to life. Always check the basics first!"

Tip: Create a quick pre-ride checklist that includes checking the kill switch, fuel level, and battery connections.

Fuel System Finesse

Mike, an experienced rider from Scotland, advises: "If your quad is struggling to start, especially after sitting for a while, don't overlook fuel quality. I learned the hard way that stale petrol can wreak havoc. Now, I always use a fuel stabilizer if I know my quad will be idle for more than a month."

Tip: When storing your quad for extended periods, either drain the fuel system or add a quality fuel stabilizer to prevent fuel degradation.

Spark Plug Savvy

Tom from Wales recounts: "I was out on a trail when my quad started misfiring. Luckily, I had a spare spark plug in my emergency kit. A quick swap, and I was back in action. Now, I always carry a spare and the tools to change it."

Tip: Include a spark plug and the necessary tools in your on-ride emergency kit. It's a small addition that can save your ride.

Conquering Corrosion

Emma, a quad bike instructor from the Midlands, shares: "I've seen many riders struggle with starting issues due to corrosion in the electrical system. Regular cleaning and a bit of dielectric grease on connections can prevent a lot of headaches."

Tip: After riding in wet or muddy conditions, take extra time to clean and inspect your quad's electrical connections.

Air Filter Awareness

John, a long-time ATV enthusiast from Norfolk, emphasizes: "Don't underestimate the importance of a clean air filter. I once spent hours troubleshooting a loss of power, only to find my air filter was clogged with dust. Now, I check and clean it religiously."

Tip: Make air filter inspection part of your regular maintenance routine, especially if you frequently ride in dusty conditions.

Tyre Pressure Tactics

Lisa from Devon offers this insight: "Proper tyre pressure isn't just about performance; it can affect starting too. I noticed my quad was harder to start when the tyres were underinflated. Correct pressure reduced the strain on the engine, making starts smoother."

Tip: Keep a tyre pressure gauge in your toolkit and check pressures regularly, adjusting for different terrains as needed.

Clutch Cable Caution

Alex, a quad bike mechanic from Manchester, warns: "A poorly adjusted clutch cable can cause starting issues that mimic other problems. I've seen riders replace batteries and starters unnecessarily when a simple clutch adjustment would have solved the issue."

Tip: Learn how to properly adjust your clutch cable and include it in your regular maintenance checks.

These real-life stories and tips highlight the importance of regular maintenance, being prepared with the right tools, and understanding your quad bike's systems. By learning from others' experiences, you can avoid common pitfalls and keep your ATV running smoothly, ensuring more time for adventure and less time troubleshooting.

Remember, while these tips can be helpful, always consult your owner's manual and seek professional help for complex issues to ensure your safety and your quad bike's longevity.

In Summary

If your quad bike refuses to start, don't despair! By following the steps outlined in this article, you can systematically diagnose and address the issue.

Remember, always consult your owner's manual and seek professional assistance if you're unsure about any step of the process.

With a bit of patience and diligence, you'll have your quad bike up and running in no time.

FAQs

Why won't my quad bike start after sitting for a long time?

Stale petrol, a dead battery or corrosion in the electrical system are common causes of starting issues in ATVs that have been idle for extended periods.

How do I know if my ATV's battery is dead? 

A dead battery may cause weak or non-existent electrical power, dimming lights or a clicking sound when attempting to start the engine.

What should I do if my ATV's spark plug is wet with petrol?

A wet spark plug may indicate flooding, which can be resolved by replacing the spark plug and cleaning or adjusting the carburettor.

How can I tell if my quad bike's air filter is dirty?

A dirty air filter will appear clogged or discoloured, and may restrict airflow. Clean or replace the filter if necessary.

Why is my ATV's engine cranking but not starting?

This may be due to issues with the fuel system, ignition system or engine compression. Perform a thorough inspection and follow the steps in this article to diagnose and resolve the problem.