10 Common Honda Foreman 450 Problems (With Fixes)

The Honda Foreman 450 is a reliable and powerful all-terrain vehicle, but it can still experience problems from time to time. 

 In this article, we’ll discuss some of the most common Honda Foreman 450 problems and provide possible solutions to help keep your ATV running smoothly.

Honda Foreman 450 Problems

Honda Foreman 450 Problems

1. Shifting Problems

Shifting problems on a Honda Foreman 450 can occur due to several reasons, most commonly due to an issue with the chain or gear. 

This issue is likely caused by a misalignment of the rear axle, a worn-out drive chain, or a bent shift drum lever. 

If you are experiencing shifting problems with your Honda Foreman 450, follow these steps to troubleshoot and fix the problem:

1. Check the positioning of the rear axle by rotating it until both wheels are in line. Misalignment of the rear axle can prevent proper gear shifting.

2. Inspect the drive chain for any stretching, wear and tear, or dryness. If any of these issues is identified, they should be replaced immediately with an appropriate part from a Honda authorized dealer and/or service center.

3. Visually inspect the shift drum lever for any bends or irregularities in its shape that may have been caused due to off-roading or impacts from other objects like rocks and roots. If any such damage is discovered, gently hammer out the bend or replace if necessary.

2. Starting Problems

Starting problems with the Honda Foreman 450 are usually caused by an issue with the spark plug or fuel system. 

A defective spark plug may fail to ignite the air/fuel mixture in the engine, causing it to not start. 

The most common cause for this is that the spark plug has become fouled, which is typically caused by a build-up of oil residue around the electrodes of the spark plug.

To address this issue, first, check and clean the spark plug using a wire brush or sandpaper. If necessary, replace it with a new one. 

It is also important to check for any debris or blockages in your fuel line and ensure that you have enough fuel in your tank to start and run your machine.

If these steps do not correct the starting problem, then you should try replacing other parts of the fuel system such as a faulty carburetor, air filter, or clogged fuel injectors. 

3. Overheating Issue

The Honda Foreman 450 is a popular all-terrain vehicle (ATV) among outdoor enthusiasts, but it can sometimes suffer from an overheating issue.

 This can be caused by a variety of different factors, from not having enough coolant to an airlock in the cooling system, and ultimately leads to damage to the engine components if left unchecked.

The most common reason for ATV overheating is low coolant levels. Before attempting to fix any other possible causes of the issue, check the level of your coolant and top it off if necessary.

 If this does not immediately resolve the problem, there may be further issues underneath that need to be addressed.

Another potential cause of overheating is a blockage in the cooling system. This could involve anything from debris blocking the radiator or hoses, or even a clogged thermostat valve which prevents coolant flow. 

In either case, flushing out your entire cooling system should be able to remove any blockages that may have formed over time and restore proper circulation again.

In more extreme cases, the engine itself might need servicing and rebuilding as well. 

This usually involves removing all parts within the engine (such as valves and pistons) and thoroughly cleaning them before reassembling them back together with new gaskets and seals in place. 

If done correctly, this can restore your ATV’s engine back to its original condition and hopefully eliminate any further overheating problems you had been experiencing.

4. Hard Starting

Hard starting on a Honda Foreman 450 can be caused by several factors, including fuel contamination or an improperly adjusted carburetor. 

Fuel contamination occurs when dirt or water enters the fuel system and clogs the fuel injectors, causing the engine to misfire or fail to start. 

To fix this issue, it is recommended to drain all of the contaminated fuel and replace it with fresh, clean fuel.

A carburetor that is not properly adjusted can also cause hard starting on a Honda Foreman 450. 

The main reason for this issue is incorrect air-fuel ratios which cause improper combustion within the engine, making it difficult to start. 

To remedy this problem, you should adjust the idle mixture screws on the carburetor and ensure that they are set according to factory specifications. 

Additionally, you should check for any vacuum leaks in the intake manifold, as these can also lead to poor engine performance and hard starting issues.

5. Transmission Problems

Transmission problems with the Honda Foreman 450 are among the most common issues that can arise with this model of ATV. 

The primary cause of transmission issues is often due to worn or damaged parts, such as the gears, shift forks, seals, and clutches. 

In addition to these mechanical components, electrical issues can also lead to transmission trouble. 

Improperly adjusted shift linkage or a faulty neutral switch may be the root of an ATV’s transmission troubles.

To solve these issues, it’s essential to properly inspect all internal components for signs of wear or damage and replace any defective parts. 

Besides, checking the adjustment of shift linkage and testing each electrical component may prove beneficial in repairing transmission problems. 

Lastly, the use of high-quality synthetic oil can reduce heat build-up within the transmission system and extend its life span.

6. Fan Problems

Fan problems in the Honda Foreman 450 can be caused by a few different factors. The most common cause of fan issues is a dirty or faulty fan motor.

 If there is debris blocking the motor, it can cause it to overheat and stop working properly. To rectify this issue, you should first try to clean out any debris from the fan motor and see if that resolves the issue. 

If not, then you may need to replace the fan motor altogether. Alternatively, some other causes of fan issues could include bad wiring connections or a faulty temperature sensor that is not accurately detecting temperature changes. 

In this case, you should check all wiring connections and replace the faulty temperature sensor as needed.

7. Charging Problems

When it comes to Honda Foreman 450 charging problems, the main reason is typically due to a faulty battery or alternator. 

If the battery is not providing enough power to turn over the engine, the charging system will be unable to produce enough electricity to power the vehicle. 

This can result in sluggish performance and even an inability to start up at all. 

To resolve this issue, it is recommended that you replace your battery with one of higher quality or higher power, as well as inspecting and replacing any worn components of your alternator such as brushes or bearings.

 Also, making sure all wiring connections are secure and free from corrosion can help prevent future charging issues.

8. Electrical Problems

One of the most common electrical problems in Honda Foreman 450 ATVs is an issue with the stator. 

The stator produces the power to run the engine and other components. If it fails, then there will be no power for the engine or any other accessories. 

The most likely cause of a stator failure is a short circuit caused by faulty wiring or worn parts. 

Therefore, checking all wiring and replacing any worn parts should be done when troubleshooting electrical problems on these vehicles. 

It is also important to ensure that all connections are secure and properly insulated to prevent further damage from occurring to the stator or other components.

9. Carb Problem

The Honda Foreman 450 is a reliable all-terrain vehicle, however, it can experience issues with its carburetor. The main reason for this is a lack of proper maintenance or the use of bad fuel. 

When this occurs, the vehicle may not start properly or may run sluggishly and erratically. To fix this issue, the carburetor should be removed and thoroughly cleaned. 

More, the fuel line should be checked for obstructions and replaced if necessary. 

Finally, fresh fuel should be added to ensure proper combustion and performance.

10. Ignition Switch Problem

The Ignition Switch Problem is a common issue with the Honda Foreman 450 ATV and can be caused by several different issues. 

The most common cause is a faulty ignition switch, which can cause the ATV to not start, or it may start but then immediately stall out.

 This problem can also be caused by loose wiring connections or a bad starter solenoid. 

In order to fix this issue, the ignition switch should be checked and replaced if necessary. 

Further, all wiring connections should be inspected for proper fit and connection and any corroded terminals should be cleaned up or replaced as needed. 

If the starter solenoid is bad, it should also be replaced with a new one. After these steps have been taken, the ATV should start without any further issues.


Overall, the Honda Foreman 450 is a reliable ATV that can handle tough terrain. However, it does have its fair share of problems such as engine issues and poor fuel economy. 

Fortunately, these problems are often easy to fix with some basic maintenance or repairs from an experienced mechanic. 

If you’re looking for a powerful all-terrain vehicle that will last for years to come, then the Honda Foreman 450 might be worth considering – just make sure to keep up on regular maintenance!


How fast does a Honda Foreman 450 go?

The top speed of a Honda Foreman 450 is up to 60 mph.

What engine is in a Honda Foreman?

The Honda Foreman 450 has a liquid-cooled OHV single-cylinder four-stroke engine. It has an output of 30 horsepower and 27 lbs/ft of torque.

When was the Honda Foreman 450 made?

The Honda Foreman 450 was first released in 1998, and production continued until the 2003 model year.

How much oil goes in a Honda Foreman 450?

The Honda Foreman 450 requires 2.8 quarts of 10W-40 oil for an oil change. For more information, it is best to consult your owner’s manual.

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