How To Start A Quad Bike When It's Not Starting
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
Removing the Spark Plug
Remove the spark plug from the engine and inspect it for signs of wear, carbon buildup, or damage. If it appears worn or dirty, replace it with a new one.
Testing the Spark Plug
Reconnect the spark plug wire and hold the plug against the engine's metal frame.
Crank the engine and watch for a bright blue spark. If you don't see a spark, further ignition system testing may be required.
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
Ensuring Fuel Flow
Verify that there's fuel in the tank and that it's flowing to the carburettor or fuel injectors.
You can do this by disconnecting the fuel line and checking for fuel flow when cranking the engine.
Checking for Fuel Blockage
Inspect the fuel filter for clogs or damage. Replace it if necessary. If the fuel line is kinked or blocked, straighten or replace it.
Verifying Air Flow
Inspecting the Air Filter
Examine the air filter for dirt
or debris. A clogged air filter can restrict airflow and prevent the engine from starting. If the filter is dirty, clean or replace it as needed.
Related: Keyless Ignition: A Guide on How to Start a Quad Without a Key
Checking for Obstructions
Inspect the air intake system for any obstructions, such as leaves, dirt or other debris. Remove any blockages to ensure proper air circulation.
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.
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.