Model Description
The TE 250i incorporates the perfect balance between usable 2-stroke power and nimble lightweight handling and feature revolutionary 2-stroke electronic fuel injection. This new-age technology redefines 2-stroke competition motorcycles cementing their position in the enduro segment for the foreseeable future. The TE 250i adds convenience and simplicity, doing away with premixed fuel and jetting changes of the past. It delivers efficiency and low emissions while retaining the simple character and inexpensive ownership of a 2-stroke.
Engine
The 250 cc 2-stroke engines have long been the best combination of unsurpassed power and lightweight construction. The simplicity and low maintenance cost of the 2-stroke motor has made it a favourite amongst enduro riders for generations. The TE 250i features a pioneering electronic fuel injection system. This comprises of a set of fuel injectors positioned at the transfer ports, which deliver the ideal amount of fuel to the engine in all conditions. This not only reduces fuel consumption and emissions but also provides a clean & smooth power delivery giving the loved 2-stroke the edge. Additionally, the 250cc engine has an advanced construction featuring shaft arrangements precisely positioned for greater mass centralisation, a counter balancer shaft to reduce vibration, a twin-valve controlled power valve and 6-speed enduro gearbox.
Cylinder
The 66.4 mm bore cylinder features a twin valve-controlled power valve system, which delivers smooth and controlled power throughout the RPM range.
For MY20, the exhaust port timing is improved by fully machining the exhaust port window, and with the combination of an optimised power valve drive and adjuster improve the function and overall performance of the powervalve. 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. The injectors deliver the fuel downwards into the transfer port, which guarantees excellent atomisation with the air travelling upward to the combustion chamber. This ensures a more efficient combustion resulting in reduced fuel consumption and emissions.
- Dual fuel injectors - excellent atomisation, reduced fuel consumption
- Power valve - Machined port window, new drive and adjuster
Piston
The lightweight piston is perfectly matched to the cylinder and transmits minimal oscillating mass ensuring high levels of reliability and performance.
- Piston - fits perfectly to cylinder and combustion chamber
Engine casings
The TE 250i engine is designed to improve mass centralisation. As a result, the lightweight, die-cast engine casings are developed to accommodate the shaft arrangements in the ideal position, centralising oscillating mass and improving ride-ability. Also, the counter balancer shaft is integrated in a very compact manner having little effect on the overall design. Additionally, for MY20, a new water pump casing improves cooling by optimising the flow of coolant.
- Die cast engine casings - mass centralisation, improved handling
- New water pump casing - improved cooling
Counter balancer shaft
The engine houses a laterally mounted counter balancer shaft. The balancer significantly reduces vibration resulting in a smoother and more comfortable ride.
- Counter balancer shaft - significantly reduced vibration
Crankshaft
The crankshaft features a 72mm stroke and is balanced in conjunction with the counter balancer shaft for minimum vibration. By incorporating a heavier ignition rotor, the crankshaft produces more inertia than its motocross counterpart, which improves control in the lower RPM range.
Gearbox
A 6-speed PANKL gearbox features enduro specific ratios while an innovative shift lever reduces dirt build up guaranteeing easy operation in all conditions.
- 6-speed gearbox - enduro specific ratios
- Gear lever - prevents dirt build up and blockage
DDS clutch
The TE 250i features a DDS (Damped Diaphragm Steel) clutch. What this means is the clutch uses a single diaphragm spring instead of the more common coil spring design resulting in a much lighter clutch action. This design also incorporates a damping system, which increases both traction and durability. The new model features a new, lighter basked and reworked inner hub, which guarantees better oil supply and cooling to the clutch. Combined with the Magura hydraulic system guarantees a light and smooth clutch feeling which is almost maintenance and adjustment free.
- DDS clutch - light action with integrated damping system, increased traction and reliability
- Magura hydraulic system - light and smooth clutch action, almost maintenance free
Oil tank & pump
The TE 250i features an electronic oil pump, which feeds vital 2-stroke oil into the engine to keep it lubricated. The pump is located just below the oil tank and feeds the oil via the throttle body meaning the oil is not mixed with the fuel eliminating the need for pre-mixing as on traditional 2-stroke engines. The pump is controlled by the EMS and delivers the optimal amount of oil according to the current RPM and engine load. This reduces waste as well as excessive smoke being transmitted from the exhaust.
The oil tank is located beneath the fuel tank and is connected to a filler hose, which runs through the upper member of the frame to a filler cap conveniently located for easy refills. The tank capacity is 0.7 litre and is fitted with a sensor, which illuminates a warning lamp visible to the rider when the oil needs to be refilled.
- Oil pump and tank - convenient solution, eliminates pre-mix