2021 KTM 250 EXC TPI

2021 KTM 250 EXC TPI

The new generation KTM 250 EXC TPI is the ultimate combination of power and rideability and sets a clear benchmark for intuitive handling, unique style and top performance. Thanks to its groundbreaking TPI (transfer port injection) technology, this extreme machine continues to reach new heights, clearly demonstrating KTM's unrelenting commitment to 2-stroke development. Besides the renowned benefits of excellent fuel efficiency, clean exhaust emissions and the removed need for jetting, the KTM 250 EXC TPI features a dynamic, lightweight frame. It was developed with feedback from factory riders and in hindsight, returns the favor by offering excellent rider feedback.

ENGINE & EXHAUST

• ENGINE

The 250cc 2-stroke engine has plenty power and torque, but remains light enough for riders to muscle their way through the toughest obstacles. Thanks to state-of-the-art engineering, innovative 2-stroke design and revolutionary TPI fuel injection technology, the powerplant is even more refined than ever before. The compact and lightweight 2-stroke is a great choice for offroad riders who want usable enduro performance that is ready to conquer in the most extreme terrain. With Euro IV homologation, it's not only considerately green, but leaves the competition green with envy too.

• CYLINDER

The KTM 250 EXC TPI cylinder has a bore of 66,4 mm and is fitted with a sophisticated power valve, which provides really smooth and controllable power characteristics. For the EFI application the cylinder features two lateral domes which hold the fuel injectors that supply fuel to the rear transfer ports. The downstream injection guarantees excellent atomization of the fuel with the upstreaming air. Thus, the loss of unburnt fuel is minimal for less emissions, a more efficient combustion and reduced fuel consumption. A little tube in the back of the cylinder is connected with an intake pressure sensor, which supplies pressure data to the control unit. The cylinders feature a state-of-the-art power valve unit with a sophisticated mechanism for the lateral support exhaust ports. The exhaust port layout increases engine performance, while the upper contour of the exhaust port has been machined to ensure more accurate port timing. Last but not least the models allow the use of a more widely available type of traditional spark plug.

CHASSIS

• FRAME

All KTM EXC models feature a high-tech, lightweight chromoly steel frame. This includes hydro-formed elements produced by state-of-the-art robot welding. With its race-proven geometries and optimal stiffness, the frame provides great feedback for the rider, playful handling and remarkable stability. The laterally attached engine head stays (the connection between cylinder, head and frame) are made of aluminum, reducing vibration and further contributing to precise cornering. The bikes also feature lateral frame guards with a structured surface, improving grip, while also serving as a heat protector against the muffler on the right side. The subframe is made of extra-light and stable aluminum profiles, weighing less than 900 gr, providing great rear fender stability.

• SWINGARM

The KTM 250 EXC TPI's one-piece aluminum swingarm is manufactured using a gravity die-cast production process, offering exceptional strength at the lowest possible weight. The single-component casting process offers low weight, perfect flex behavior and also allows for a large number of geometry solutions.