Honda has built all-terrain vehicles for the American market with the designation 300 since the late 1980s. These include the Fourtrax, Sportrax and TRX names. The latest model is the 300 TRX300EX, which is built for the sport and recreational riding market.
The TRX300EX has a 282-cubic centimeter engine with a single cylinder. The engine is liquid cooled and has a single-overhead cam design, which means that the camshaft directly controls the valves, without the use of pushrods. The engine has a bore and stroke of 2.9 by 2.6 inches or 74 mm by 65.5 mm. The bore is the diameter of the engine cylinder opening and the stroke is the total distance the piston travels up and down. The ATV has an accelerator pump carburetor fuel induction system and a capacitor discharge ignition along with an electric start.
TRX Transmission and Suspension
The TRX has a manual five-speed transmission with a chain final-drive system. The chain is used to transfer power from the engine to the rear wheels. The ATV has a reverse gear to get riders out of sticky situations, or simply to reverse out of a small garage.
The front suspension of the TRX300EX has an adjustable double-wishbone suspension with 7.1 inches of travel -- distance the suspension travels freely to absorb shocks. The rear suspension uses a swing arm with a single shock and 7.9 inches of travel and is also adjustable.
The front brakes are dual disc and the rear wheels use single-disc brakes. A disc brake is a metal disc fixed to the wheel. When force is applied by pulling on the brake lever, pads push on the disc and cause friction, slowing the wheel.
The newest Honda 300 ATV is 67.7 inches long, 43.5 inches wide and 41.8 inches high. The front tires are 22 x 7-10 knobby radial and the rear tires are 22 x 10-9 knobby radial. The seat is at a height of 30.5 inches and the ATV has a ground clearance of 4.6 inches. The ATV weighs 390 lbs. and has a turning radius of 10.2 feet. The fuel tank holds 2.2 gallons with has a 0.5 gallon reserve to give riders time to get back to base if riding out in the wilderness.
Older Honda 300 ATVs
The 2004 Sportrax 300Ex version is slightly lighter at 377 lbs. and has a seat at 30.3 inches high but generally shares the same engine and chassis specs of the newer TRX300EX.
The 2000 Fourtrax, also with a 282-cc engine, is longer than the TRX at 75.2 inches, has 1.7 more inches of ground clearance and a larger, 3.3-gallon fuel tank. The Fourtrax is about 100 lbs. heavier than the TRX and has automatic five-speed transmission where the TRX has manual transmission.
- Photo Credit Jupiterimages/Brand X Pictures/Getty Images
Honda FourTrax 300 Specifications
The Fourtrax 300 was Honda's entry-level utility quad. Featuring a heavy-duty steel frame, a proven single-cylinder engine and aggressive all-terrain tires, it...
Specs on 1992 Honda TRX 300
In 1988, Honda released the FourTrax 300 (TRX300). Manufactured from 1988-1992, this early ATV helped shape future four-wheelers. It was available in...
How do I Adjust a Carb on a Honda 300EX ATV?
The Honda FourTrax 300EX is a small all-terrain vehicle (ATV) that has a lot to offer. This ATV is a cross between...
How to Remove the Fuel Tank on a Honda 300 4x4 ATV
The fuel tank on a Honda TRX 300 4x4 is located in front of the seat, underneath the plastic body panels. The...
How to Remove the Starter From a Honda FourTrax 300
Removing the starter on the Honda FourTrax 300 is a job that you can complete in about half an hour. The starter...
How To Adjust the Valves on a Honda 300EX
Adjusting the valves on a Honda 300EX ATV is relatively uncomplicated. The most time-consuming aspect of the procedure is removing parts and...
Specifications of the 1995 Honda TRX 300 FourTrax
The 1995 Honda TRX 300 FourTrax is a utility ATV with engine displacement comparable to a small motorcycle. Honda produced the TRX...
Honda 400 Ex Specs
From 1999 to 2009, Japan-based Honda Motors manufactured the Sportrax 400EX all-terrain-vehicle (ATV). This mid-level quad-runner replaced Honda’s previous, and popular, 250R....
1990 Honda Fourtrax Specifications
The 1990 Honda Fourtrax--officially known as the TRX300 or TRX300FW--was produced by Honda from 1988 through 2000, and in the early years...
Specifications for a 1986 Honda Fourtrax 200SX
The original Honda Motors was established in Japan in 1946. Honda is currently a global leader in the manufacture and distribution of...
2001 Honda 300EX Specs
Honda's 300EX all-terrain vehicle hit the market for the first time in 1993 and was discontinued in 2008. The 2001 Honda Sportrax...
Specifications for a Honda 300EX
Honda's TRX line of ATVs is designed for use on rugged off-road trails. They are not street legal in most municipalities. The...
Honda 4 Wheeler 300 Specifications
When Honda designed the TRX300X, they were resolute to give the demanding riders everything they had demonstrated a craving for, without challenging...