Honda TRX450R: A Comprehensive Review

When discussing high-performance sport quads, the Honda TRX450R consistently emerges as a formidable contender. For the 2008 model year, enthusiasts might have expected significant overhauls, especially with new rivals entering the fray boasting electronic fuel injection and wider stances. However, Honda opted for a different approach, keeping the core of the TRX450R remarkably consistent. One common query that often arises, particularly for those new to the model, is whether the Honda TRX450R even features a fuel tank. Rest assured, it absolutely does! In fact, for 2008, Honda introduced a rather appealing update: the TRX450R would now be available with matching colour fuel tanks, moving away from the previously standard black tank across all colours. This subtle yet welcome change allowed for a more cohesive aesthetic, available in striking red, crisp white, and classic black.

This decision by Honda to maintain the status quo, save for the cosmetic fuel tank update, speaks volumes about the TRX450R’s inherent strengths. With multiple companies pushing innovations like electronic fuel injection, longer A-arms, and wider axles, Honda's confidence in its design was rooted in undeniable success. The TRX450R had, after all, swept both major ATV MX championships that season, proving its mettle where it truly counts: on the racetrack. Honda’s philosophy was clear: if it’s winning, why change it? This article delves into the specifics of the 2008 Honda TRX450R, exploring its engine, performance, handling, and how it stacked up against the competition, offering insights into why this quad remains a favourite among dedicated riders.

Engine and Powertrain: The Heart of the Beast

At the core of the Honda TRX450R lies a robust 450cc liquid-cooled SOHC, four-valve, four-stroke engine. This powerhouse is designed for both reliability and performance, a hallmark of Honda engineering. Uniquely, Honda maintained its offering of two distinct versions of its high-performance sport quad for 2008: one equipped with a convenient electric starter and the other featuring the traditional kick-starter. The electric start variant offers the ultimate ease of use, firing up with a simple push of a button, even when in gear. This convenience adds a layer of user-friendliness, particularly appealing for trail riders or those who prefer effortless starts.

It’s important to note that adding a kick-starter to the electric start version is not a straightforward task, if at all feasible, due to design differences. The weight discrepancy between the two models is minimal, a mere six pounds, which largely accounts for the weight of the electric starter itself, making it a negligible factor in overall performance. The engine breathes through a large airbox and a Keihin 40mm flat slide carburettor, complete with a throttle position sensor. While many competitors, and even Honda’s own two-wheeled bikes, had begun adopting electronic fuel injection (EFI), the TRX450R steadfastly stuck with its carburettor for 2008. There was speculation that EFI might make an appearance on the 2009 model, potentially after Yamaha introduced it on their YFZ450, but Honda’s cautious approach was evident. The TRX’s rev limiter kicks in at a high 9850 rpm, allowing the engine to truly stretch its legs. Despite a 12:1 compression piston, starting is surprisingly easy thanks to a built-in automatic compression release. Power delivery is abundant, allowing riders to comfortably run a gear higher in challenging terrain. Furthermore, the stock muffler, while very quiet, imposes virtually no restriction on the engine’s impressive output.

Performance and Handling: On the Track and Trail

The Honda TRX450R is a machine built for exhilarating performance, particularly evident in its handling characteristics when pushed to the limit. It feels remarkably light in the air, allowing it to fly straight as an arrow, making it an excellent jumper. The power is instantaneous and unequivocally strong, often described as "arm-ripping." Riders need to hold on tight, as the quad can feel like it wants to take off without them if not firmly controlled. It revs quickly and pulls hard across the entire powerband – from the bottom-end, through the mid-range, and right up to the top-end. Like many Hondas, the TRX450R is also remarkably easy to wheelie, adding to its fun factor and agility on varied terrain. Its racing pedigree is undeniable, having cleaned up in the racing scene, with Joe Byrd securing another title on the ATVA national tour and John Natalie triumphing in the WPSA series against strong competition.

Up front, the TRX450R features a double A-arm setup providing 8.4 inches of suspension travel. The piggyback reservoir shocks are fully adjustable for compression, rebound, and pre-load, allowing riders to fine-tune the suspension to their specific preferences and riding conditions. The rear end mirrors this capability with a linkage swingarm, offering an impressive 9.3 inches of wheel travel, surpassing the front. However, it's worth noting that in its stock configuration, the TRX450R isn't considered the best-handling ATV in its class. Its relatively narrow chassis means riders often need to muscle it through corners, and a noticeable tipping sensation can be present until modifications are made with longer A-arms and a wider axle. Aggressive riders tend to appreciate the stock suspension settings, especially through high-speed sections and G-outs, where the setup truly shines. Conversely, slower riders might find the ride harsh at lower speeds, underscoring the TRX450R's design intent as a machine optimised for speed and high-performance riding.

Distinctive Features and Updates

For the 2008 model year, the Honda TRX450R saw a notable, albeit subtle, aesthetic upgrade. In previous years, Honda had typically fitted all colour variants of the TRX with a universal black fuel tank. However, for 2008, the TRX450R became available with matching colour fuel tanks, providing a more integrated and appealing look. This meant buyers could choose between models with red, white, or black fuel tanks that complemented the overall bodywork, enhancing its visual appeal.

Beyond cosmetics, Honda also continued to offer its popular power-up kit for the TRX450R. This kit, often referred to as the HRC kit, is a significant enhancement for riders looking to unlock even more performance from their machine. It typically includes a different cam, an exhaust tip, a head pipe, a CDI sub harness (which raises the rev limit to 10,000 rpm), and jets for the carburettor. Honda proudly claimed that with this modification, the engine's output could reach close to fifty horsepower, transforming an already powerful quad into an even more formidable racing machine. This demonstrated Honda's commitment to providing an accessible path for enthusiasts to upgrade their quads for serious competition, without necessarily having to delve into extensive aftermarket modifications.

TRX450R vs. The Competition: Value and Stance

In the highly competitive 450cc sport quad market of 2008, the Honda TRX450R stood out not only for its proven performance but also for its compelling value proposition. Priced at £6999 (equivalent to $6999 in the provided text), it positioned itself as a more affordable option compared to many of its key rivals. Let's look at how it compared:

As the table illustrates, the TRX450R was notably less expensive than several of its direct competitors. The Suzuki QuadRacer 450, for instance, commanded a higher price but offered a motocross-ready wider stance and was one of only three 450cc quads (alongside the Kawasaki KFX450R and Can-Am DS450) to feature electronic fuel injection. The all-new KTM XC models, while coming equipped with numerous high-end "aftermarket" components straight from the factory, carried a significantly higher price tag, making them a substantial investment unless one was fully committed to serious racing. Can-Am’s DS450 was already making waves, having won numerous professional races and turning heads in the high-performance class with its innovative design and EFI.

The Honda TRX450R and the Yamaha YFZ450, having been on the market the longest, continued to be the more financially accessible choices. While they lacked the EFI of some newer rivals, their proven track record, reliable performance, and durable construction made them incredibly attractive options for a wide range of riders. The anticipation for future head-to-head shootouts between these powerful machines was high, promising stiff competition across the board.

Is the TRX450R Right for You?

There are numerous compelling reasons why Honda opted for minimal changes to the 2008 TRX450R. Fundamentally, it is an incredibly versatile machine and, characteristic of all Hondas, it boasts exceptional durability. In terms of engine performance, riders will find very little to complain about; the motor is a true workhorse, delivering consistent and potent power. The handling department, however, might require some fine-tuning for certain riders. While capable out of the box, aggressive riders or those planning to compete will likely find that an aftermarket front end, featuring longer A-arms and a wider axle, is necessary to truly unlock its full cornering potential and eliminate the tipping sensation. Even trail riders might opt for such modifications to enhance stability and comfort over varied terrain.

With two distinct choices available in the 2008 model year, the TRX450R offers flexibility to cater to different riding styles. The electric start version is an excellent choice for woods and trail riding, providing more than ample power and the convenience of effortless ignition. For dedicated racers, the kick-start version might be preferred, though it may require further enhancements to be fully competitive on the racetrack. A simple installation of Honda’s HRC power-up kit, as mentioned earlier, is often all that is needed to significantly amp up the kick-start version for racing. The prospect of a fuel-injected TRX450R was a topic of much discussion and anticipation, perhaps for future model years, as Honda continued to refine its approach to the evolving high-performance ATV market. Regardless, the 2008 TRX450R remains a testament to Honda's philosophy of building robust, capable, and championship-winning machines.

Frequently Asked Questions (FAQs)

Does the Honda TRX450R have a fuel tank?

Yes, the Honda TRX450R is equipped with a fuel tank. For the 2008 model year, Honda introduced an aesthetic update, offering the TRX450R with matching colour fuel tanks. This was a change from previous years where a black tank was standard across all colour schemes. In 2008, the TRX450R was available with fuel tanks matching its bodywork in red, white, and black, enhancing its overall visual appeal.

What is the weight of a Honda TRX450?

The dry weight of the Honda TRX450 varies slightly depending on the specific model. The TRX450R (kick-start version) has a dry weight of 357 lbs (approximately 161.9 kg). The TRX450ER (electric start version) is slightly heavier at 363 lbs (approximately 164.6 kg). This represents a decrease in dry weight compared to earlier models, improving the quad's power-to-weight ratio and agility.

Is it recommended to buy a TRX450R?

The TRX450R is highly recommended for experienced riders seeking a "no compromise" performance machine. It is purpose-built for competition and aggressive riding. While it offers race-winning capabilities, the electric start version does provide a concession for everyday civility, making it more convenient for trail riding. If you are an experienced rider looking for a durable, powerful, and reliable quad with a proven racing pedigree, the TRX450R is an excellent choice, particularly if you are prepared to fine-tune its handling for optimal performance.

How much engine oil does a 450R take?

Based on observations from owners, there can be some variation in the amount of engine oil the TRX450R takes during an oil change. One owner noted that after draining the oil for about 30 minutes, it took "a little bit less than half a quart" to reach the full mark, despite believing it should take "just under a quart." This suggests that the actual amount required can depend on the thoroughness of the drain process, as some residual oil may remain in the system.

What are the key differences between the kick-start and electric-start versions?

The primary difference between the kick-start (TRX450R) and electric-start (TRX450ER) versions lies in the starting mechanism. The electric start offers push-button convenience and can start in gear, making it ideal for trail riders. The kick-start version is lighter by approximately six pounds, which is the weight of the electric starter. It's generally not easy, or even possible, to add a kick-starter to the electric start model due to engine design. The electric start version also has a slightly lower rev limit than the kick-start version, which can be modified with the HRC power-up kit.

Why did Honda stick with a carburettor for the 2008 model?

Honda's decision to stick with a Keihin 40mm flat slide carburettor for the 2008 TRX450R, despite competitors introducing electronic fuel injection (EFI), was likely based on the adage, "Why change it if it's winning?" The carburetted TRX450R had proven its championship-winning capability. While EFI offers benefits like better fuel economy, easier cold starts, and altitude compensation, Honda likely wanted to wait until the technology was fully refined for ATV applications, possibly waiting for competitors like Yamaha to make the move before committing to EFI on their sport quads. There was speculation that EFI might appear on later models.

How does the TRX450R perform in racing?

The Honda TRX450R boasts an exceptional racing pedigree. In the 2008 season, it managed to win both major ATV MX championships, a testament to its raw performance and reliability. Joe Byrd secured another title on the ATVA national tour, while John Natalie triumphed in the WPSA series, beating out formidable competition from other brands like Suzuki. This consistent success on the track underscores its capabilities as a top-tier racing machine, known for its powerful engine, responsive handling (when properly set up), and ease of launching and jumping.

What are the suspension characteristics of the TRX450R?

The TRX450R features a double A-arm front suspension with 8.4 inches of travel and a linkage swingarm rear suspension offering 9.3 inches of travel. Both the piggyback reservoir shocks are fully adjustable for compression, rebound, and pre-load, allowing for customisation. While the suspension handles high-speed sections and G-outs well for aggressive riders, providing a firm and controlled ride, slower riders might find the stock setup harsh at lower speeds. For optimal handling, especially in aggressive racing scenarios, many riders opt for aftermarket front ends to widen the stance and improve cornering stability.

What colours were available for the 2008 TRX450R?

For the 2008 model year, the Honda TRX450R was available in three distinct colours: red, white, and black. A notable update for this year was the introduction of matching colour fuel tanks for each of these options. Previously, Honda had typically used a black fuel tank across all colour schemes, so this change provided a more integrated and aesthetically pleasing look for the quad.

What is the HRC power-up kit?

The HRC (Honda Racing Corporation) power-up kit is an official performance upgrade offered by Honda for the TRX450R. This kit is designed to significantly boost the engine's output and is popular among racers and performance enthusiasts. It typically includes components such as a different camshaft, an exhaust tip, a head pipe, a CDI sub harness (which increases the rev limit to 10,000 rpm), and jets for the carburettor. Honda claimed that with this kit installed, the engine could produce close to fifty horsepower, transforming the quad into an even more potent racing machine.

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