01. Engine & Exhaust
Engine
A state-of-the-art, liquid cooled, single-cylinder, four-stroke 250 cc engine gets you started in KTM’s exciting world of ADVENTURE. The engine is equipped with an electric starter and delivers a smooth power for playful exploration. Twin overhead camshafts, four valves and electronic fuel injection are integral to the KTM 250 ADVENTURE’s power delivery and together with a balancer shaft, they ensure the highest levels of smoothness. Its lightweight and compact construction facilitates straight air intake channels, allowing for a shortened distance for air to flow into the combustion chamber, and beyond for gas to flow to the two catalytic converters. Besides the faster movement of air and gases, it also allows the engine to warm up faster. Additionally, the two catalytic converters and the fuel tank ventilation system (EVAP system) improve emission values and prevent fuel vapors from being released into the environment, making the KTM 250 ADVENTURE extremely eco-friendly and compliant with the strict EU5 exhaust emission standards.
Slipper Clutch
The slipper clutch is a unique feature that saves power and helps in slides. It opens when the engine back-torque becomes too high, preventing annoying rear wheel chatter when braking sharply or decelerating and gives the wheel just that little bit of braking for a controlled rear wheel slide. It also closes with the force of the clutch springs when the throttle is opened, allowing the clutch to be pulled with the little finger, which saves energy when riding.
Piston
The 72 mm bore piston is DLC coated for extra durability. It performs a stroke of 61.1 mm, which results in a displacement of 248.77 ccm and produces a compression ratio of 12.5:1. The crown is cooled by the oil spray nozzle, while the piston uses a continuous, low-friction, nicasil-coated aluminum wet bushing with open-deck design.
Cylinder head
State-of-the-art DOHC (Double Overhead Camshaft) technology. The four valves in the cylinder head of the KTM 250 ADVENTURE are actuated, via durable finger followers, by two overhead camshafts. This design is one of the preferred performance solutions of many offroad models, including the successful KTM 1290 SUPER ADVENTURE. It is not only renowned for its extreme reliability, but also offers low friction, thanks to the ultra-hard DLC coating on the finger levers – a solution that makes this engine super reliable, even when pushing for longer at high RPM.
Electronic fuel injection
The 250 ADVENTURE is fitted with a modern engine management system featuring BOSCH electronic fuel injection in conjunction with a DELL’ORTO 38 mm throttle body. The system guarantees perfect throttle response, excellent fuel efficiency and low exhaust emissions.
Gearbox
The KTM 250 ADVENTURE is fitted with a robust 6-speed sequential gearbox. The gear ratios fit perfectly to the power band of the 250 cc engine and allow you to smoothly select the perfect gear, whether it be flowing street rides or more challenging offroad escapes.
A2 License
The KTM 250 ADVENTURE matches all the A2 driver´s license requirements.
Exhaust
The KTM 250 ADVENTURE features a lightweight and precision-crafted exhaust system comprising of stainless steel header pipe and pre-muffler leading the exhaust gases to a slim silencer. The silencer features a light aluminium sleeve and has been positioned close to the bike’s overall center of gravity without disturbing the rider when moving on the bike. It improves balance and handling, whilst also delivering smooth, instant power. The pre-muffler is made from stainless steel. Two catalytic converters are integrated in the header pipe and pre-muffler respectively bringing the exhaust emissions down to Euro IV level.
Engine
Slipper Clutch
Piston
Cylinder head
Electronic fuel injection
Gearbox
A2 License
Exhaust
