10 Most Common Suzuki Eiger 400 Problems- How to Fix

The Suzuki Eiger 400 is a popular all-terrain vehicle that many enjoy using for work and play. With its powerful 376-cc engine and sturdy build, it’s no wonder why this ATV has been a top choice for many riders. However, the Suzuki Eiger 400 has its share of problems, like any vehicle.

The Suzuki Eiger 400 is plagued by problems including engine stalling, cold start problems, bad fuel petcock, clicking noise during starting, faulty crankshaft, lack of movement in forward or reverse, startup issues, faulty power steering, excessive engine overheating, and lagged acceleration.

In this article, I’ll take a closer look at some of the common issues riders may experience with their Eiger 400 and provide tips on how to fix them. So, whether you’re a seasoned Eiger 400 rider or just getting started, this article will surely offer some valuable insights and advice.

Specifications of Suzuki Eiger 400:

Now, let me discuss the potential problems and the fixes for the Suzuki Eiger 400 in the next section.

1. Engine Stalling at Idle:

The Suzuki Eiger 400 is occasionally plagued by the issue of engine stalling at idle. This problem manifests as difficulty maintaining a stable idle speed or sudden engine shutdown when the vehicle is not in motion. Engine stalling at idle can significantly hinder the ATV’s functionality and cause frustration for owners.

The underlying causes of this problem can vary, but the most common culprits are related to the ATV's fuel and air intake systems. Insufficient fuel delivery, improper carburetor settings, or blockages in the fuel lines can disrupt the optimal air-fuel mixture required for smooth idle operation.

Additionally, issues with the ATV’s ignition system, such as faulty spark plugs or ignition timing, may contribute to engine stalling.

How to Fix:

To rectify this issue and restore proper idle performance, you can follow the steps I explain below:

• STEP 1- Carburetor Inspection and Adjustment: 

Begin by thoroughly inspecting the carburetor for any signs of blockages, dirt, or wear. Clean the carburetor using an appropriate carburetor cleaner, ensuring that all passages and jets are free from obstructions.

Properly adjust the carburetor settings, including the idle mixture screw and idle speed, according to the manufacturer’s specifications.

• STEP 2- Fuel System Inspection: 

Check the fuel lines, filter, and pump (if applicable) for any clogs, leaks, or damage. Replace damaged or worn components and ensure a steady fuel flow to the carburetor.

• STEP 3- Ignition System Check:

Inspect the spark plugs for fouling, wear, or improper gap settings. Replace the spark plugs if necessary, ensuring they are of the correct type and properly gapped. Additionally, confirm the ignition timing to ensure it meets the recommended specifications.

• STEP 4- Air Intake System Examination:

Check the air filter for clogs, dirt, or debris. Clean or replace the air filter as needed, ensuring proper airflow to the engine.

2. Cold Start Issues:

In cold weather, the engine of the Suzuki Eiger 400 ATV may fail to start, leading to operational issues. If the ATV is not idle for some time, further problems can occur as the engine and fuel pipes do not heat up adequately. The vehicle must be heated up in icy conditions to ensure proper fuel flow. 

These conditions can cause the battery to work harder, leading to additional strain and a shortened lifespan.

One common cause of starting issues is a dirty carburetor. Inspect the carburetor for any clogging or buildup and, if present, clean it thoroughly before attempting to run the engine on idle.

How to Fix:

The ‘cold start’ issue is a common problem that many Suzuki Eiger 400 owners face. This problem occurs when the engine has not been used for an extended period or when the temperature is too low and the engine struggles to start.

Here are the most effective solutions to address the cold start issues in Suzuki Eiger 400:

3. Bad Fuel Petcock:

If you are an off-road enthusiast, you might know the bad consequences of having a malfunctioned petcock in your vehicle.

This bad fuel Petcock in your ATV delays the working of the vehicle as Petcock holds the capability of controlling the flow of fuel in the vehicle. 

Damage to the Petcock can cause issues like fuel leakage, which can damage the carburetor. If the malfunctioning Petcock is left untreated, it can create misfiring in the vehicle and cause problems hydro-locking in the engine, which is irreparable.

How to Fix:

Let me note down the solutions to follow in order to diagnose and fix the faulty Petcock issue:

• If you suspect the presence of a lousy petcock in the ATV, check the fuel leakage in the Petcock and near its surrounding areas. This inspection of the vehicle can point out the presence of any leakages and holes in the vehicle, which can be replaced.
  
• The vacuum line in the vehicle is responsible for controlling fuel flow in the Petcock. Keep an eye on the connection of the vacuum line, as issues with this area can create malfunctioning in the Petcock.
  
• Accumulation of dust or debris in the Petcock can cause clogging, which restricts the smooth flow of fuel toward the engine. Clean the Petcock thoroughly by soaking it in a cleaner or replacing it with a new one if required.
  
• Also properly adjust the Petcock in its place as improper aligning of this component can create fuel delivery problems in the vehicle.

4. Clicking Noise During Starting:

One common issue Suzuki Eiger 400 ATV owners faces is a clicking noise when attempting to start the vehicle. This clicking noise typically indicates a problem in the ATV’s starting system and can prevent the engine from cranking and starting properly. 

The clicking noise during the starting process is often associated with a faulty starter relay or solenoid. The starter relay transmits electrical current from the battery to the starter motor, initiating the engine's cranking action. When the relay fails to function correctly, it can result in a clicking sound instead of the desired engine turnover.

How to Fix:

To address this problem and resolve the clicking noise issue, the following steps can be taken:

• STEP 1- Check Battery Connections: 

Begin by inspecting the battery terminals and cables for any loose, corroded, or damaged connections. Ensure the battery is charged correctly and securely connected to the ATV’s electrical system.

• STEP 2- Examine Starter Relay: 

Locate the starter relay near the battery or on the ATV’s frame. Carefully inspect the relay for any signs of damage, such as burnt or corroded terminals. Replace the relay if necessary, ensuring that the replacement part matches the specifications provided by the manufacturer.

• STEP 3- Test the Starter Relay:

Perform a continuity test on the starter relay using a multimeter set to measure resistance. This will help determine if the relay is functioning correctly or if it needs to be replaced. Follow the manufacturer’s instructions or consult a service manual for the specific testing procedures and acceptable resistance values.

• STEP 4- Inspect Safety Switches:

The Suzuki Eiger 400 ATV has safety switches, such as the neutral or clutch safety switch, that prevent the engine from starting under certain conditions.

Check these safety switches for proper operation and ensure they engage and disengage correctly. Clean or replace any faulty switches that may interfere with the starting process.

• STEP 5- Seek Professional Assistance:

If the clicking noise issue persists after performing the steps above, it is recommended to seek the expertise of a qualified technician or refer to the manufacturer’s service manual for further diagnostic and repair procedures.

They will have the necessary tools and knowledge to diagnose more complex electrical issues and provide appropriate solutions.

5. Faulty Crankshaft:

One of the most prevalent issues encountered in later models of the Suzuki Eiger 400 ATV is related to a faulty crankshaft. Users often report experiencing severe vibrations while operating the ATV, which can be attributed to a damaged or malfunctioning crankshaft. 

In addition, a damaged crankshaft can lead to difficulties in starting the vehicle and occasional backfiring.

The primary cause of a damaged crankshaft is overheating, which can occur when the engine's cooling system is compromised. Overheating can disrupt the proper functioning of the crank sensor, resulting in significant damage to the crankshaft assembly and ultimately causing the ATV to cease functioning.

How to Fix:

Addressing a faulty crankshaft in the Suzuki Eiger 400 requires careful attention and appropriate measures. Check the following steps:

• STEP 1- Inspect the Crankshaft:

Thoroughly examine the crankshaft for any signs of damage or irregularities. If the crankshaft is not functioning correctly or shows significant damage, replacing it with a new one is advisable.

• STEP 2- Replace Damaged Bearings:

If the bearings associated with the crankshaft are damaged, it can create issues and contribute to the malfunction. Consider replacing the damaged bearings to ensure the proper functioning of the crankshaft.

• STEP 3- Maintain Proper Oil Level and Pressure:

Insufficient oil level or low oil pressure can also damage the crankshaft. Regularly check and maintain the appropriate oil level and ensure proper lubrication to avoid unnecessary stress on the crankshaft.

• STEP 4- Balance the Crankshaft:

An improper crankshaft balance can cause vibrations and potentially damage the engine.

It is essential to ensure that the crankshaft is balanced correctly, per the manufacturer’s specifications, to minimize vibrations and maintain optimal engine performance.

• STEP 5- Seek Professional Assistance:

Inspecting and repairing the crankshaft can be a complex task. It is advisable to seek help from a qualified mechanic or an authorized service center experienced in working with the Suzuki Eiger 400.

6. Suzuki Eiger 400 Not Moving in Forward or Reverse:

One common issue that Suzuki Eiger 400 owners may encounter is when the ATV fails to move in either the forward or reverse gear. 

This problem can be frustrating and hinder ATV usability. When this issue occurs, it is essential to identify the underlying cause and implement the necessary fixes to restore proper functionality.

The primary reasons for the ATV not moving in forward or reverse include:

• Transmission Problems:

A malfunctioning transmission can prevent the Eiger 400 from engaging the gears correctly. Issues such as worn-out clutch plates, damaged shift forks, or faulty transmission gear can result in the loss of power transmission, causing the ATV to stay stationary.

• Drive Belt Issues:

The drive belt transfers power from the engine to the wheels. If the drive belt is worn, damaged, or improperly installed, it can slip or fail to engage, leading to a loss of propulsion in both forward and reverse gears.

• Clutch Problems:

The clutch system in the ATV allows for smooth engagement and disengagement of power from the engine. If the clutch is worn, damaged, or improperly adjusted, it may not fully disengage, causing the ATV to stall or experience difficulty in moving.

• Differential or Drivetrain Malfunctions:

Problems with the differential or drivetrain components, such as broken gears, damaged axles, or worn-out bearings, can prevent power from being transmitted to the wheels effectively, resulting in the ATV’s inability to move.

How to Fix:

Addressing the issue of the ATV not moving in forward or reverse requires careful troubleshooting and appropriate solutions. Here are some potential fixes to consider:

• STEP 1- Transmission Inspection and Repair:

Begin by inspecting the transmission system for any signs of damage or wear. If issues are identified, such as worn clutch plates, damaged shift forks, or faulty gears, they should be repaired or replaced as necessary.

• STEP2- Drive Belt Replacement:

If the drive belt is worn, damaged, or incorrectly installed, replacing it with a new one that meets the manufacturer’s specifications is essential. Ensure proper tensioning and alignment during the installation process.

• STEP 3- Clutch Adjustment or Replacement:

Inspect the clutch system for signs of wear or damage. If adjustments can be made, follow the manufacturer’s guidelines to ensure proper clutch engagement and disengagement.

In cases of severe wear or damage, consider replacing the clutch components.

• STEP 4- Differential and Drivetrain Examination:

Thoroughly inspect the differential and drivetrain components for any visible signs of damage or malfunction. Replace any broken gears, damaged axles, or worn-out bearings to restore proper power transmission.

7. Startup Issues:

One prevalent problem encountered by early manufacturing batches of Suzuki Eiger 400 ATVs is related to the carburetor or the air-fuel mixture, resulting in startup issues. 

When the ATV remains idle for an extended period, the carburetor can become jammed, leading to operational difficulties during startup.

The carburetor is a crucial component responsible for mixing air and fuel in the proper ratio for combustion within the engine. 

When the carburetor becomes clogged or obstructed with debris, varnish, or stale fuel residue, it hinders fuel flow and disrupts the air-fuel mixture, making it challenging for the engine to start and run smoothly.

Symptoms of startup issues in the Suzuki Eiger 400 ATV may include difficulty starting the engine, prolonged cranking before ignition, engine sputtering or stalling rough idling, or poor acceleration.

How to Fix:

Various factors can cause startup issues in the Suzuki Eiger 400. Follow the steps I explain in the table below:

8. Faulty Power Steering Component:

Despite the advantage of having power steering, which sets the Suzuki Eiger 400 apart from its competitors, several consumers have encountered problems with the power steering component.

Numerous reports suggest that the Suzuki Eiger 400 steering occasionally lacks power and becomes stiff, resulting in difficulties for drivers when maneuvering the vehicle.

The power steering system in the Suzuki Eiger 400 is designed to assist the driver by reducing the effort required to turn the wheels, particularly in challenging terrains or when navigating tight spaces. 

However, when the power steering component malfunctions, it can compromise the smooth operation of the steering system and diminish the driver’s ability to steer the ATV easily.

How to Fix:

If you are experiencing issues with the power steering component in your Suzuki Eiger 400, you can do a few things to diagnose and solve the problem.

Here are the steps you can follow:

9. Excessive Overheating in Engine:

While the Suzuki Eiger 400 boasts a naturally aspirated and durable engine, it is not immune to the problem of excessive overheating.

This issue commonly occurs when the vehicle is driven continuously for extended periods, pushing the engine to its limits. Failure to maintain proper engine oil levels or neglecting regular oil changes can also contribute to overheating.

The engine of the Suzuki Eiger 400 generates power through a combustion process that generates heat as a byproduct. To prevent overheating, the engine relies on the cooling system, which consists of components such as the radiator, coolant, water pump, and thermostat. 

However, in certain conditions, the cooling system may struggle to dissipate the excess heat efficiently, leading to overheating.

Several factors can contribute to excessive overheating in the Suzuki Eiger 400 engine:

• Continuous Operation:

The engine can generate excessive heat when the vehicle is driven for long durations without breaks, such as during extended trail rides or demanding work tasks. The continuous operation prevents the engine from cooling down adequately, leading to overheating.

• Low Engine Oil Level:

Maintaining the correct engine oil level is crucial for proper lubrication and heat dissipation. Insufficient engine oil levels can hinder the cooling process and increase friction and heat buildup, leading to overheating.

• Dirty or Clogged Radiator:

The radiator plays a vital role in dissipating heat from the engine coolant. Over time, the radiator can accumulate dirt, debris, and sediment, reducing its efficiency. 

A clogged or dirty radiator restricts airflow and compromises the cooling system’s ability to regulate engine temperature.

• Malfunctioning Water Pump:

The water pump circulates the coolant throughout the engine, facilitating heat transfer. If the water pump is faulty or not functioning optimally, it can impede coolant circulation, leading to inadequate cooling and overheating.

How to Fix:

Several factors can cause excessive overheating in a Suzuki Eiger 400. Here are the most effective steps you can take to diagnose and solve the overheating problem:

10. Lagged Acceleration:

When operating the Suzuki Eiger 400 in challenging off-road conditions, such as steep or muddy terrain, users may encounter a noticeable lag in acceleration. 

This issue can hinder the ATV’s ability to achieve a smooth and consistent speed, impacting the overall driving experience. 

To resolve this problem and restore optimal acceleration performance, it is essential to identify and address the underlying causes.

• Dirty or Clogged Air Filter:

A filthy or clogged air filter can limit the airflow to the engine, resulting in an inadequate air-fuel mixture. This can lead to sluggish acceleration and reduced engine performance. Inspect the air filter and clean or replace it if necessary, following the manufacturer’s guidelines.

• Worn-out Spark Plugs:

Over time, spark plugs can become worn or fouled, affecting ignition and causing irregular combustion. This can result in decreased acceleration and power delivery.

Check the condition of the spark plugs and replace them if worn or fouled, ensuring the new spark plugs are compatible with ATV’s specifications.

• Clogged Fuel Filter:

A clogged fuel filter can restrict fuel flow to the engine, leading to insufficient fuel supply and reduced performance. Inspect the fuel filter and clean or replace it as needed. Regular maintenance and timely fuel filter replacement can help prevent acceleration issues.

• Malfunctioning Carburetor:

The carburetor plays a crucial role in mixing air and fuel for proper combustion in the engine. If the carburetor is not functioning correctly, it can disrupt the fuel delivery and adversely affect acceleration.

Have a qualified mechanic inspect and tune the carburetor, ensuring it is clean and properly adjusted.

• Damaged Throttle Cable:

A damaged or improperly adjusted throttle cable can result in a sluggish response when accelerating. Inspect the throttle cable for any signs of damage, such as fraying or excessive slack. Replace or adjust the throttle cable to ensure smooth and responsive throttle operation.

How to Fix:

It is recommended to address these issues by either replacing the damaged components with new ones or seeking the assistance of a certified mechanic or professional technician for repairs.

They possess the expertise and specialized tools to diagnose and resolve these issues effectively.

Pros and Cons of Suzuki Eiger 400:

Users’ Feedback/Review of the Suzuki Eiger 400:

“In a nutshell, it’s a great bike. Revs fast, handles well. Steering is very light for an almost 600 lb machine. Plenty of power, top speed in the mid-upper 50’s. Good jumper and the front dif. puts power to the wheel on the ground. That, combined with good ground clearance and the full skid plate make it a good mud bike too. On top of all that, it gets great gas mileage – 25mpg or more with a 4 gallon tank.”

Source: atvconnection.com

“I have been very pleased with this ATV, my first. The strengths have to be: 1) built like a tank, very smooth ride over rough surfaces; 2) 4wd acts like it should: all four tires spin in the slick stuff; 3) powerful engine with proven durability: the basic engine design has been used by Suzuki with great results for 15 plus years; 4) value: I paid 4500 for my 4×4 auto, plus tax. Weaknesses: not much, but 1) not much storage; 2) seat is a little smaller than some of the bigger machines out there; 3) brakes require a lot of pull to create decent whoa-power.
Overall, it’s a standup triple if not a home-run for the money!”

Source: atvconnection.com

“It is in my opinion that this machine is one of the best all around machines that Suzuki has put out. Like each of us has said, its a great bike. My wife and I ride it double and it still has all the power that it does when I ride by myself. In fact she says that she wants to trade in her KQ for one. My suggestion was that she can have this one and I will get the new Everest when it hits the market. lol Thats got her thinking now!!

We ride it in the snow, mud and ice. Whatever is on the ground at the time and even with 2 people it will still do 55 and still have power to spare. We climbed snow covered paths and old logging roads today and only put it in low 4X4 twice. It handles very smooth, has a smooth ride and the power is there when you need it. Thats what I like the best.”

Source: atvconnection.com

Final Thought:

The Suzuki Eiger 400, like any vehicle, is prone to experiencing certain problems. However, most of these issues can be effectively addressed with proper understanding and maintenance.

It is crucial to follow the recommended solutions provided in this article and seek professional assistance when necessary. With regular maintenance and timely repairs, owners can ensure a reliable and enjoyable riding experience with their Suzuki Eiger 400 ATVs.

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Frequently Asked Questions (FAQs):

Is the Suzuki Eiger 400 a good quad?

The vehicle is a reliable quad, has the utmost performance, and is considered a good buy.

What is the high mileage for a Suzuki Eiger 400 ATV?

5000 miles is considered high mileage for a Suzuki Eiger 400 ATV.

Is Suzuki Eiger 400 a Chinese-made ATV?

No, the Suzuki Eiger 400 is not a Chinese-made ATV. Suzuki is a Japanese company known for manufacturing motorcycles, automobiles, and ATVs. The Eiger 400 is one of Suzuki’s ATV models designed and produced by Suzuki Motor Corporation, based in Japan.

What causes a Suzuki Eiger 400 to backfire?

A clogged air filter would cause the vehicle to backfire because of the prevention of fuel from reaching the combustion chamber.

How long does a Suzuki Eiger 400 last?

If a Suzuki Eiger 400 . is well maintained, then the age of a Suzuki Eiger 400 is around 10 years.