The Honda 300 Ex Review [Features and Specifications]

Honda is renowned for its exceptional production quality in automobile manufacturing, and the company has never compromised on this front. The 300Ex is a prime illustration of a product manufactured to the highest standards and provides ATV riders with an exhilarating off-road experience.

The perfect Blast-from-the-Past-Story for Honda’s automobiles would be the Honda 300Ex Series. In 2009, Honda made the surprising decision to discontinue production of the 300EX and instead began production of the TRX300X. Nevertheless, it managed to maintain its high standard throughout its production run, which lasted from 1993 to 2008. In 2021, the 300EX returned under different names with the most modernized versions of the features that were available in 2008.

This year’s Honda 300EX Is powered by a powerful and stable 282cc air-cooled four-stroke engine that hasn’t been changed since 1992. From a kick start to a keyed electric start, reverse gear, an automatic chain for back movement, a strong tire and brake for wheelie fun, and a plethora of other features for the ultimate ATV experience.

You can learn more about the Honda 300ex Top Speed, Specifications, Review, and other relevant things by reading the information below.


Honda 300ex Overview

The Honda 300EX is a multi-terrain vehicle that the company first produced in 1993. It is being released as an improved version of the TRX250X, which is currently the only sport ATV on the market suitable for both novice and experienced riders of any age.

Even though the 300EX has, for the most part, maintained its original design throughout its 17-year production run before Honda finally decided to stop making it, it was able to live up to the expectations of ATV enthusiasts during that time.

In TRX300x, you’ll find the identical ATV, complete with the 282cc 4-stroke engine and other features. Fans of the 300EX will be pleased to learn that although the model has been available for sale for a long time and so many have been purchased, many secondhand models are still available.

Honda 300ex Specs and Features

In 2008, TRX300X took the place of Honda’s 300EX, which is now discontinued and can no longer be purchased. The 300EX retains the same engine as well as all of its other features. Therefore, the characteristics we will discuss are applicable to the most recent model and the older version of the ATV.


The most recent version of the Honda 300EX features an engine that is a single-cylinder four-stroke power cycle SOHC air-cooled 282cc unit. This engine was first produced by Honda, a pioneer in the all-terrain vehicles (ATVs) industry. It effectively transforms the fuel’s energy into the machine’s energy.

The engine has a cylinder bore that measures 74 mm and a stroke of 65.5 mm. A piston valve measuring 32 mm in diameter and an accelerator pump are both included in the combustion system. In addition, there is only one carburetor.


The electric starting technology is user-friendly and offers a high degree of convenience. The EX comes equipped with a CD ignition system that functions as a pulse transfer and enables the vehicle to start up more rapidly. Additionally, the CD ignition system is exceptionally dependable and does not require regular maintenance.


It is either a 2WD or 4X2 driveline type and has a single driveline mode. The 300EX comes standard with a chain that features an O-ring seal and is lightweight. For simple and convenient movement in the opposite direction, there is both a manual clutch and a 5-speed gearbox that includes a reverse gear. The transmission of power from the engine to the wheels is made as efficient as possible by the concerted efforts of each and every one of these parts.


The height of the front tire on the 300EX measures 22 inches, its width measures 7 inches, and the diameter of the rim measure 10 inches. The height of the rear tire is 22 inches, with a width of 10 inches and a rim diameter of 9 inches. Additionally, the height of the tire’s rim is 9 inches. Both of these tires have a long service life and excellent gripping ability.


Brakes are simple to apply and adjust. Both the front and the rear brakes are hydraulic disc brakes. The front brake is a Dual Hydraulic Disc, and the rear brake is also a hydraulic disc. When driving in off-road conditions, the excellent safety provided by both breaks is a necessity.


High-tensile steel, which is both lightweight and strong, was used in the construction of the frames. Independent of the rear suspension, the front suspension of the EX model features a double-wishbone design with dual hydraulic shocks and a travel distance of 6.7 inches. It features an adjustable spring preload with five different settings. The front suspension is carried over to the rear, comprising a single shock and a 5-position spring preload.


The length and width of the Honda 300EX measure 43.5 inches and 67.7 inches, respectively. The seat height is 33.3 inches, and the wheelbase length is approximately 45.3 inches. The weight is approximately 171 kilograms. In addition, the fuel tank on the 300EX can hold 2.2 gallons of fuel. The vehicle measures 124 mm in ground clearance.

Extra Features

Honda provides a six-month warranty on purchase. The other features include a helmet holder, a washable two-stage foam air filter, and a handlebar cover. A kit, a 60/55-watt halogen lamp, a dust cover, and other accessories are included with the 300EX.

Honda 300ex Max Speed

The Honda 300EX has a max speed of 50 miles per hour. There are various points of view held by different test riders concerning this subject. The EX has a variable top speed that shifts based on the terrain conditions and the vehicle’s capabilities.

On a straight stretch of paved road, the 300EX can achieve approximately 54 miles per hour, while on a dirt road, the top speed can drop anywhere from 5-8 miles per hour, depending on the type of dirt road. A test driver provided this information. When traveling at speeds greater than 54 miles per hour, it is possible that the driver will experience discomfort, which may be followed by unfavorable consequences.

However, if the aspect ratio of the gear is changed, it is possible to drive the 300EX at speeds of up to more than 60 miles per hour. In light of the fact that there is a possibility that a GPS will display a speed that is either higher or lower than the actual mph, it is best to verify the precision of the Honda 300EX’s GPS before going for a test drive in the vehicle.

How to Improve the Honda 300ex Top Speed?

On standard terrain, the Honda 300EX can reach its top speed of approximately 50 to 52 miles per hour. Your vehicle’s value will increase as you add more speed to it. I have provided a list of a few ways that EX fans who want to increase the speed of their 300EX can do so.

Adjusting Sprocket’s Drive Ratio:

Changing the sprockets that come standard on the 300EX will allow you to increase its top speed significantly. Sprockets, also known as chain wheels, consist of multiple teeth. To adjust the drive ratio, you must first adjust the sizes of the rear and front sprockets and then divide those numbers to arrive at the desired ratio.

The 300EX’s standard speed range Is 50 km/h, but it can be increased to 70 km/h by changing the teeth on the front sprocket to 15 and the teeth on the rear sprocket to 36. Furthermore, the ideal ratio for the 300EX is 14/34, which increases the ATV’s speed to around 65 KMH.

Increase the HorsePower:

A significant amount of power can be extracted from the engine, resulting in a higher speed. There are a few different things that can be done to improve the performance of an ATV. First, check to see that the engine has adequate airflow.

Improving the airflow intake is one of the simplest ways to get additional power out of your vehicle. Second, make adjustments to the exhaust system for improved performance. Find the best aftermarket exhaust for your vehicle to reduce weight and improve performance.

Upgrade essential parts located within the engine or replace the engine entirely:

Changing essential parts inside an existing engine, such as the cylinder, the piston, and the crankshaft can help boost the machine’s performance. You shouldn’t have any trouble taking apart the engine and putting it back together again.

The best course of action might be to purchase a new engine if you are unsure of your ability to disassemble the one that is currently installed in your vehicle. Concerns that may arise include the fact that this stage requires a significant financial investment and the possibility that you will need to hire a professional to finish this task.

Reduce Drag by Replacing Heavy Parts:

Lighter alternatives can be used in place of heavy copper-based parts. It can potentially reduce the aerodynamic drag and increase the speed of the 300EX. You can change things like the wheel, the Thumb Throttle Assembly, and the compilers.

Honda 300ex – Pros and Cons


  • Easily accessible upgrades options
  • Little maintenance required
  • Reverse gear
  • Increased gas mileage
  • Sturdy handle


  • Speed: The required speed depends on the road you’re riding on. It would be better if the 300EX had a little more extra speed. However, the top speed can be increased.
  • Suspension: Compared to the 400Ex, the suspension on the 300EX is lesser. The 300EX front suspension is a double-wishbone with 6.7 inches of travel, whereas the 400Ex has an independent double-wishbone with 8.2 inches of travel.
  • Height: The 300EX is a mid-size ATV that can be too short for riders taller than 6 feet.

Frequently Asked Questions

Does Honda still produce the 300ex?

No. Honda abruptly discontinued production of the 300EX in 2008. The TRX300x, which has the same features and characteristics as the Honda 300EX, was introduced in the same year. So, there’s no reason to be depressed if you’re an EX-lover.

How much horsepower does the 300ex use?

The stock horsepower of the Honda 300EX ranges from 15 to 18 hp. Since horsepower is determined by torque and other factors such as piston or cylinder maintenance, replacing internal engine parts can increase horsepower by up to 40 percent. Furthermore, increased engine maintenance ensures that the 300EX’s horsepower remains consistent.

How many gears does 300EX have?

In addition to four standard gears, the EX has a fifth reverse gear that allows it to navigate various road conditions. With the assistance of an easy-to-use reverse gear, riders can easily go backward.

Is the 300ex a 2 stroke?

No. The Honda 300Ex has a 282cc, single-cylinder, four-stroke engine. And the quality and characteristics have remained constant since its inception in 1993 to the present day.

What is the weight and height of a Honda 300ex?

The mid-size Honda 300EX measures 67.7 inches in height and weighs approximately 171kg. The weight is comparable to that of other ATVs.


Thanks to the information presented in this article, you are fully informed on the Top Speed, Specifications, and Review of the Honda 300ex. I highlighted some of the pros and cons of the Honda 300EX and demonstrated some of the most effective methods for increasing the top speed of the Honda 300EX. The Honda 300EX was developed to perform exceptionally well on gravel and unpaved surfaces. A rider must be at least 16 years old before they are permitted to operate this model. Some cities and countries prohibit riders of the 300EX from using highway roads. This is one of the limitations. Fans of ATVs will find that the TRX300EX is an outstanding choice for a vehicle.