2023 GASGAS EX 250

MOTOR

The 6-speed EX 250 features a high-performance offroad motor that in the hands of an expert racer can be used to power the bike up and across terrain few would imagine passable. The perfect bike for 2-stroke fun, it's lightweight construction, twin-valve controlled power valve, true cross country specific transmission ratios and vibration reducing balancer shaft combine to give the much loved 2-stroke a competitive edge. Keeping life easy, our innovative fuel injection system does away with the need for time consuming jetting changes while also reducing fuel consumption and emissions.

OIL TANK & PUMP

There's no need for pre-mixing fuel with the super-convenient EX 250! Instead, the bike features an electronic oil pump that feeds 2-stroke oil into the motor, keeping it lubricated via the throttle body. Using engine speed and throttle position sensor data, the engine management systems's precise control of the oil pump delivers the perfect amount of oil for any given conditions. The result? Reduced emissions by up to 50 per cent compared to a conventional pre-mix lubricated engine. The EX 250 maintains an average fuel-to-oil ratio of 80:1, which means one tank full of oil is enough for at least five tanks of fuel. Result!

CYLINDER & PISTON

The 66,4mm bore EX 250 cylinder features a Twin-Valve Controlled (TVC) power valve system, which delivers smooth and controlled power throughout the RPM range. Optimal exhaust port timing is achieved with the combination of the state-of-the-art, adjustable power valve drive and a machined exhaust port window. Additionally, the cylinder features two inlet positions located on the transfer ports at the rear of the cylinder where a pair of fuel injectors are mounted. Deliver the fuel downwards into the transfer port these injectors guarantee perfect atomization with the air travelling upward to the combustion chamber. This ensures a more efficient combustion resulting in reduced fuel consumption and emissions. We match a lightweight piston to the EX 250 cylinder to ensure the highest levels of reliability and performance. It's as simple as that!

COUNTER BALANCER SHAFT

Reducing rider fatigue by significantly decreasing motor vibrations the EX 250 houses a laterally mounted counter balance shaft, which ensures fun, enjoyable days in the saddle.

TRANSMISSION

We use a forged 6-speed Pankl Racing Systems transmission that features specific cross country gearing in our EX 250, ensuring durability and reliability as well as ensuring riders can tackle high-speed fields and tight, technical woods. Additionally, an innovative shift lever reduces dirt build up guaranteeing easy operation in all conditions.

CRANKSHAFT

The EX 250 crankshaft features a 66,4mm stroke and is balanced in conjunction with the counter balancer shaft for minimum motor vibrations. By incorporating a heavier ignition rotor, the crankshaft produces more inertia for a smooth, cross country specific power delivery.

CRANKCASE

To us they are designed to centralize oscillating masses. All any rider needs to know is that our crankcases help make the EX 250 super-agile and easy to weave in and out of trees! Lightweight and die-cast, as well as being built to house internal shafts in the ideal position, they include a counter balancer shaft to keep the motor smooth. They're also seriously strong!

EXHAUST SYSTEM

Ensuring cross country specific power, our EX exhaust systems are designed to deliver the highest possible quality. Comfortably meeting all FIM sound regulations, The EX 250 header pipe is produced with an innovative 3D stamping process to offer optimal geometry, performance and ground clearance, making it less susceptible to damage. The EX 250 muffler also features an advanced internal construction for excellent noise damping and weight saving.

DS CLUTCH

To ensure a super light and consistent clutch action we fit a Damped Diaphragm Steel (DDS) clutch and Brembo hydraulic system to our GASGAS EX 250. Using a single diaphragm spring instead of the more common coil spring, the design also incorporates a damping system, which increases both traction and durability. Additionally, the light and robust basket and inner hub guarantee optimal oil supply and cooling to the clutch. It's almost maintenance free, too!