Dirt Bikes

2024 GasGas EX 300 Technical Information

Features and specifications of GasGas’ 300 two-stroke cross-country racer.

June 19, 2024

GasGas’ EX 300 has been completely remodeled for 2024, featuring a new engine, chassis, and suspension. One of the most notable updates is that its electronic fuel injection (EFI) system has been switched from transfer port injection (TPI) to throttle body injection (TBI). This closed-course off-road competition motorcycle is designed to be at home on the trail and track, and used for hardcore off-road and GNCC-type racing.

We’ve had a 2024 GasGas EX 300 in the Dirt Rider stable and are spending plenty of time testing it. Before releasing our full review of the fun Austrian brand’s largest-displacement two-stroke cross-country racer, let’s highlight some of its features and go over technical details.

The all-new 2024 GasGas EX 300 cross-country model (pictured) and new-for-2025 GasGas MC 300 motocrosser are similar, but the former has off-road features such as a six-speed gearbox, larger fuel tank, and an 18-inch rear wheel.Jeff Allen

The EX 300 engine has a square bore and stroke of 72.0 x 72.0mm, giving it a displacement of 293cc. Its crankshaft is counterbalanced to reduce engine vibration to almost zero.Jeff Allen

A new EFI system features a dual-injector Keihin 39mm throttle body and an electronically controlled power valve.Jeff Allen

As far as peak figures on Dirt Rider’s in-house dyno, the EX 300 cranks out 50.1 hp and 33.1 lb.-ft. of torque at the rear wheel.Jeff Allen

EFI doesn’t use a choke, but there is a fast idle for cold starts. A light push will click it in and hold the throttle open just the right amount.Jeff Allen

The red knob is for adjusting the engine’s idle rpm.Jeff Allen

The EX 300 is equipped with electric start, and its starter motor is almost 100 percent hidden under the crankcase. A small plastic shield protects the starter from those pesky rocks.Jeff Allen

The engine inhales through a newly shaped, high-quality Twin Air air filter that’s easy to change without tools.Jeff Allen

Most electrical and electronic systems are hidden under the seat.Jeff Allen

All of GasGas’ full-size dirt bikes have updated fuel pumps for 2024, which are more durable and better at extracting all the fuel available from the tank.Jeff Allen

An easy-to-read hourmeter is now included, helping you keep track of maintenance schedules.Jeff Allen

The new WP Xact 48mm closed-cartridge coil-spring fork is a welcome addition. Both fork legs offer compression and rebound damping adjustability.Jeff Allen

Forged triple clamps have a machined groove mimicking a split-finger design for additional rider comfort.Jeff Allen

One of the biggest updates for 2024 is the double-cradle chromoly steel frame. It’s designed with parallel mounts, a new forged shock mount, and reworked rigidity to improve rider comfort.GasGas

Swingarm is new as well with a hollow, die-cast design offering increased rigidity and reduced unsprung weight.Jeff Allen

Braking duties are covered with Braktec hydraulics and calipers utilizing a 260mm front rotor and 220mm rear rotor.Jeff Allen

A one-piece lower handlebar mount is solid-mounted for maximum control.Jeff Allen

The 2.4-gallon fuel tank is well concealed behind the radiator shrouds and under a black top cover. Be sure not to forget the two-stroke oil, as this is a premix fuel system.Jeff Allen

GasGas’ largest-displacement two-stroke cross-country model weighs 242 pounds wet on our automotive scales.Jeff Allen

2024 GasGas EX 300 Specs

MSRP:	$10,599
Engine:	Liquid-cooled, two-stroke single-cylinder
Displacement:	293cc
Bore x Stroke:	72.0 x 72.0mm
Compression Ratio:	N/A
Transmission/Final Drive:	6-speed/chain
Dirt Rider Measured Horsepower:	50.1 hp @ 8,400 rpm
Dirt Rider Measured Torque:	33.1 lb.-ft. @ 7,200 rpm
Fuel System:	Keihin EFI w/ 39mm throttle body
Clutch:	Wet, multiplate Damped Diaphragm Steel (DDS); hydraulic actuation
Frame:	Central double-cradle chromoly steel
Front Suspension:	WP Xact 48mm closed-cartridge coil-spring fork, compression and rebound damping adjustable; 11.8 in. travel
Rear Suspension:	WP Xact shock, spring preload, high/low-speed compression damping, and rebound damping adjustable; 11.8 in. travel
Front Brake:	Braktec 2-piston caliper, 260mm disc
Rear Brake:	Braktec 1-piston caliper, 220mm disc
Front Tire:	Dunlop Geomax MX33; 80/100-21
Rear Tire:	Dunlop Geomax AT81; 110/100-18
Rake/Trail:	26.1°/NA
Wheelbase:	58.6 in.
Ground Clearance:	13.9 in.
Dirt Rider Measured Seat Height:	37.8 in.
Fuel Capacity:	2.4 gal.
Dirt Rider Measured Wet Weight:	242 lb.
Availability:	Now
Contact:	gasgas.com