Honda Foreman 400: A Complete History

The Honda Foreman 400, also known by its moniker the FourTrax, made its grand entrance into the all-terrain vehicle (ATV) market in 1995. It quickly established itself as a robust and reliable machine, impressing riders with its blend of power, utility, and innovative design. Featuring a single-cylinder, four-stroke engine, rugged all-terrain tires, and integrated steel racks, it was the go-to choice for a diverse range of users, including ranchers, industry professionals, hunters, and off-road enthusiasts. The Foreman 400 represented a significant step forward from its predecessor, the TRX300, and offered a glimpse into the future advancements Honda would bring to the utility ATV segment.

Honda's foray into the utility ATV class with the Foreman 400 was marked by several key features, including a speedometer, triple drum brakes, and an efficient overhead-valve engine design. Notably, it was the first Honda ATV to incorporate a longitudinally mounted engine. This revolutionary engine placement, which was later replicated in other models like the Honda Recon, contributed to the quad's unique handling characteristics and ease of maintenance. The Foreman 400 also served as a valuable learning platform for Honda, as addressing its initial design considerations helped to refine and strengthen subsequent utility vehicle offerings.

This article delves into the rich history, detailed specifications, and common issues associated with the Honda Foreman 400, aiming to provide a comprehensive understanding of one of Honda's most influential utility ATVs.

The Genesis of the Foreman 400

Upon its release in 1995, the Honda Foreman 400 was the largest ATV ever produced by Honda. The Japanese manufacturer specifically engineered this heavy-duty utilitarian vehicle to cater to a variety of demanding tasks. These included hunting expeditions, light towing and ploughing, camping trips, and the hauling of essential equipment. For the 2001 to 2004 model years, Honda introduced a range of aftermarket attachments and subtle exterior updates, further enhancing the Foreman's versatility and appeal.

Despite its substantial build, the Foreman 400 was approximately 50 lbs lighter than its contemporaries, a benefit directly attributed to its longitudinally mounted engine. While not a lightweight machine, its ingenious driveline layout and capable all-wheel-drive system more than compensated for its mass, ensuring excellent performance and stability in challenging off-road conditions. The innovative overhead-valve design also played a crucial role in reducing the engine's height, which in turn allowed for increased ground clearance. This, combined with a rugged suspension system, enabled the quad to navigate over mid-sized rocks and through gullies with remarkable smoothness.

Equipped with front and rear racks, the Foreman 400 offered ample space for carrying a variety of gear, from camping essentials to harvested timber. Its torquey, low-end power delivery and the convenience of an easy-to-use reverse gear made towing and navigating slow, technical sections virtually effortless. It's no wonder that the Foreman almost immediately became a favoured choice among recreational riders, farmers, and hunters alike.

Throughout its 9-year production run, the Foreman 400 largely retained its core mechanical configuration. The most significant exterior updates were introduced with the 2001 model year, shortly before the Honda Foreman TRX400FW concluded its production run in 2004. Optional accessories available during its lifecycle included an AM/FM radio-cassette with speakers, a CB radio, high-performance exhaust systems, lawnmower attachments, oil coolers, power blades or ploughs, snow blowers, utility trailers, and winches, underscoring the model's adaptability.

In a testament to Honda's engineering prowess, the company also introduced a high-performance sport ATV with the same engine displacement in 1999 – the Honda FourTrax 400EX. Both the Honda Foreman 400 and the 400EX achieved considerable popularity, becoming ubiquitous sights at riding areas and race tracks across the United States. While the Honda Foreman 400 proved to be a valuable workhorse for households and the agricultural sector, the Honda FourTrax 400EX ignited the burgeoning ATV sport industry during that decade.

Evolution and Enhancements: Post-1997 Updates

While the Honda Foreman 400 maintained its fundamental configuration throughout its production, it did receive several key enhancements that improved its performance and features:

These updates, particularly the introduction of Electronic Power Steering (EPS), TraxLok (allowing riders to switch between 2WD and 4WD), and Programmed Fuel Injection (PGM-FI) on later models, significantly boosted the Foreman's user-friendliness and off-road capability.

Honda Foreman 400 Specs and Features (TRX400FW)

Engine

The Honda Foreman 400 is powered by a longitudinally installed, four-stroke, air-cooled, single-cylinder SOHC engine. It features a bore-stroke ratio of 86 mm x 68 mm and an engine displacement of 395 cubic centimeters (24.1 cubic inches). Fuel is delivered via a 32-mm vacuum piston carburetor, and the compression ratio stands at 8.2:1. The lubrication system is a forced pressure and wet sump type, employing an oiled double Urethane air filtration system. The engine itself weighs 111 lbs (50.4 Kg), and the fuel tank capacity is 3.18 US gallons (12 litres) with an additional 0.7-gallon reserve.

Drivetrain

Power is managed through a five-speed constant mesh transmission that includes a reverse gear. The clutch system is an automatic centrifugal, multi-plate wet clutch. Primary reduction is 2.103 (61/29), and the final reduction is 3.153 (41/13) for both front and rear drives. Gear changes are operated by the left foot. The air intake is connected to a plastic water snorkel, designed to prevent water ingestion during shallow water crossings. The all-wheel-drive system provides excellent traction in varied conditions.

Ignition

Starting is facilitated by a DC-CDI (Capacitor Discharge Ignition) electric starter system, complemented by an emergency recoil starter. The charging system is a triple-phase output alternator.

Lubrication

The Honda Foreman 400's oil capacity varies depending on whether the oil filter is changed. With a drain, it holds 2.1 US quarts. When disassembled, the capacity is 2.84 US quarts, and with an oil filter change, it's 2.21 US quarts. For optimal performance, Honda recommends using Honda GN4 4-stroke oil or an equivalent motor oil with an API service classification of SF or SG.

Tires

The front wheels are equipped with Goodyear Tracker ATT AT24 x 8-11 tires, while the rear wheels feature Goodyear Tracker ATT AT24 x 10-11 tires. The wheelbase measures 50.2 inches.

Brakes

Braking is handled by dual-sealed hydraulic drum brakes on the front and a single-sealed mechanical drum brake on the rear.

Suspension

The front suspension utilizes an independent double-wishbone setup with a double-tube damper, offering 4.33 inches (110 mm) of travel. The rear suspension comprises a swingarm with a double-tube damper supporting dual rear shocks, also providing 4.33 inches (110 mm) of travel. This suspension design contributes to an overall turning radius of 11.5 feet, ensuring smooth and predictable handling.

Dimensions

The overall length of the Foreman 400 is 76.5 inches, with a width of 45.5 inches. Its height is 42.5 inches, providing a ground clearance of 7.3 inches. The seat height is 30.9 inches. Both front and rear treads measure 33.5 inches. The dry weight is 551 lbs (249.5 Kg), with a Gross Vehicle Weight Rating (GVWR) of up to 1,059 lbs. This GVWR includes a curb weight of 574 lbs and a maximum weight capacity of 485 lbs (220 Kg) for both passengers and cargo.

Exterior

This Honda four-wheeler features a durable double-cradle steel frame and resilient plastic bodywork that is easy to clean. Foot pegs are designed to facilitate a more aggressive riding position. The dashboard includes a multi-function speedometer that also displays mileage information, making it highly practical for farm work. Front and rear cargo racks are capable of carrying payloads of 66 lbs and 132 lbs, respectively. The four-wheeler boasts a total towing capacity of 850 lbs and comes standard with a tow hitch. Full fenders provide protection from water and debris.

Lighting

Illumination is provided by two 25-watt headlights mounted on the front fenders and a 45-watt assist headlight, all utilizing multi-reflector lenses for optimal light distribution. A 5-watt taillight and a 1.7-watt indicator light (for oil, reverse, and neutral) are also included. For enhanced visibility during night rides, an upgrade to Nilight 7-inch Round Cree LED Headlights, complete with matching fog lights, is a popular option.

Electric Shift Program (ESP™)

Introduced in the 1998 model year, ESP™ allowed riders to shift gears up or down with the simple push of a button. This feature was particularly beneficial for riders who found operating a conventional manual gearbox challenging. An onboard electronic control module (ECM) monitors data from four sensors to manage gear speed and clutch engagement, with shifting speeds adapting to the rider's style. Crucially, ESP™ is not battery-dependent and includes an auxiliary shift lever for manual shifting if required.

TraxLok

This system, made available from 2002 onwards, allowed riders to seamlessly switch between two-wheel and four-wheel drive, depending on the traction needs of the terrain. TraxLok was an intuitive system that engaged only when the speed difference between the front and rear wheels was less than 6 mph.

Common Honda Foreman 400 Issues and Troubleshooting

While the Honda Foreman 400 is renowned for its reliability, like any machine, it can experience certain issues. Here are some common problems and potential solutions:

Ignition Problem (Neutral Indicator Not Lighting)

Occasionally, the neutral indicator light may fail to illuminate when the ignition is turned on. This can be a frustrating issue, as wiring diagrams in the service manual may not directly address it. Start by checking the battery and the 30-amp circuit breaker. If these are in good order, inspect the 5-pin connectors located under the seat cover and below the handlebars. A jumper cable or a ground test on the hotwires can help identify where power is not flowing. If the problem persists, professional assistance from a mechanic is recommended.

Leaking Carburettor

If the carburettor is leaking fuel, first ensure the fuel valve is in the 'off' position, not 'reserve'. Disassembling the carburettor and inspecting the float is crucial. If the float is saturated and sinking, it may feel soft when pressed. The seat should be clean and free of corrosion. The needle, if metal, should have a smooth, unworn tapered end. If worn, the needle, seat, and rubber tip will need replacement. Check the float level, as it may require adjustment if the carburettor has been serviced previously.

High Idle

A high idle issue, sometimes indicated by a glowing exhaust, often occurs after a carburettor replacement. This can be due to an incorrect air/fuel screw setting or a faulty CDI unit. Ensure the throttle screw is backed out, the butterfly valve is fully closed, and the boot between the engine and carburettor is intact. The air/fuel screw should typically be set between 2 to 2-1/2 turns from lightly seated. When replacing the carburettor, compare the jets to ensure they are of the correct size. If all else fails, a new CDI unit can resolve the issue.

Intermittent Idling / Midrange Stumble

If the quad stumbles when trying to access fuel in the midrange but runs well at higher RPMs, check the regulator and rectifier for damage, as these can affect other electrical components like headlights and the engine control unit. Thoroughly clean the fuel tank, fuel line, inline fuel filter, air filter, and carburettor, ensuring no foreign material is present. Replacing the petcock and spark plug can also help. Investigate for vacuum leaks. A sonic cleaner is ideal for thorough carburettor cleaning, but even partial blockages in the pathway from the pilot jet to the pilot screw can cause issues. Soaking the carburettor in hot, soapy water for a couple of hours can soften stubborn build-up. With the pilot jet and pilot screw removed, cover the small pilot screw hole inside the carburettor bore with your finger and use a compressor to blow into the other hole to clear any obstructions.

Other potential causes include a float level set too high, vapour lock, or a leaking primer pump. If the voltage is too high at idle, it will typically manifest as issues past half throttle. Addressing a blocked pilot circuit is paramount for smooth operation.

Choked Up Acceleration

Symptoms such as the engine starving for air after a smooth start-up or the idle remaining high after applying throttle indicate a potential issue. A carburettor rebuild, including the replacement of the diaphragm and plunger/needle, can resolve this. Inspect the parking brake's safety wiring, as it can sometimes interfere with ignition timing. Examine the boot between the carburettor and engine for tears or holes. Spraying carb cleaner on this boot; if the idle speed changes, it confirms an air leak. When cleaning the carburettor, check the petcock and fuel lines for debris, as alcohol in fuel blends can create residue. Using a fuel filter is also recommended. Many motorcycle carburettors have removable orifice tubes that can be cleaned effectively by spraying brake cleaner and high-pressure air through them. Simply dipping and spraying without removal is often insufficient.

Frequently Asked Questions (FAQs)

How much is a Honda Foreman 400 worth?

The original list price for the 1995 Honda Foreman 400 was $5,999. By 1997, this increased to $6,099. Interestingly, the 2001-2004 models saw a slight price reduction of $200 compared to the 1997 model, despite offering more features. Resale values typically range between $865 and $3,675, depending on the model year, condition, and any modifications.

What is the Honda Foreman 400 top speed?

The top speed of the Honda Foreman 400 is generally around 45 mph. Some owners have reported achieving speeds of up to 48 mph. Modifications such as increasing tire size, installing a lift kit, or implementing power upgrades can potentially increase the top speed.

What is considered high mileage for a Honda Foreman 400?

For any ATV, 10,000 miles is generally considered high mileage. The highest recorded mileage for a Honda Foreman 400 is approximately 20,000 miles. In addition to mileage, it's important to also consider the total operating hours.

What size battery does a Honda Foreman 400 have?

The Honda Foreman 400 requires a 12V, 200-CCA (Cold Crank Amp) battery with assembled dimensions of approximately 5.80 x 3.26 x 5.71 inches (Length x Width x Height).

How much weight can a Honda Foreman 400 pull?

The ATV's rated maximum towing capacity is 850 lbs (385.6 Kg), a figure that applies to all year models of the Foreman.

Where is the Honda Foreman year and VIN located?

The Vehicle Identification Number (VIN) can be found on the front left side of the frame, near the A-arms. On older Foreman 400 models, the VIN sticker may be prone to detachment.

Is there a year model I should avoid when buying a Honda Foreman 400?

While the Foreman 400 is generally reliable, some sources suggest that the 1997 and 1998 models may have a higher incidence of certain issues. It's always advisable to thoroughly research and investigate the history of any used vehicle before making a purchase.

About Honda

Honda Motor Company Ltd., the manufacturer of the Honda Foreman 400, is a true pioneer in the sport ATV industry. Since its founding in 1946, the Japanese giant has evolved significantly. While Honda continues to produce a wide array of high-quality automobiles, power equipment, and commuter motorcycles, its impact on the sport ATV segment remains a significant part of its legacy. Today, Honda is recognized as a global leader in robotics, artificial intelligence, mobility solutions, and energy technologies, consistently pushing the boundaries of innovation.

Conclusion: The Enduring Legacy of the Honda Foreman 400

Since its introduction, the Honda Foreman 400 has proven itself to be a hardworking and dependable machine, capable of handling demanding work weeks and transforming into a capable weekend warrior. Its plush suspension allows riders to comfortably traverse challenging terrains, from rutted creek beds to steep inclines and rocky obstacles. While it has had its share of minor issues, most can be resolved with straightforward maintenance and occasional upgrades. The Foreman 400's simple yet innovative design offers an enjoyable riding experience and practical solutions for a wide range of tasks. Honda once again succeeded in delivering a machine that captivated the market, solidifying the Foreman 400's place as an iconic and influential utility ATV.