Abstract: An two-stroke internal combustion engine includes a cooling circuit having at least one passageway on the exhaust side of the engine for cooling the exhaust side of the engine and at least one passageway on the intake side of the engine for cooling at least a portion of the intake side of the cylinder. The engine also includes at least one cooling channel traversing the engine located in the vicinity of one of the bearings supporting the crankshaft for cooling the bearings.

Abstract: A two-stroke internal combustion engine including a molded ignition housing connected to the crankcase of the engine which protects the electric generator of two-stroke internal combustion engine.

Abstract: An internal combustion engine is disclosed. The internal combustion engine includes a crankcase and a mounting plate or base plate connected to the bottom portion of the crankcase. The base plate includes a plurality of engine mountings integrally formed with the base plate for securing the engine to a chassis. The base plate and the crankcase cooperate together to define at least one cooling chamber within the crankcase and cooling fluid passageways within the at least one cooling chamber.

Abstract: An exhaust valve assembly for a two stroke internal combustion engine having a cylinder with at least one main exhaust port and one auxiliary exhaust port is disclosed. The assembly comprises a main exhaust valve for at least partially closing the main exhaust port, an auxiliary exhaust valve for at least partially closing the auxiliary exhaust port, the auxiliary exhaust valve being separate from the main exhaust valve, and an actuator for actuation of the main exhaust valve and the auxiliary exhaust valve, wherein the actuator is connected to the main exhaust valve and the auxiliary exhaust valve is connected to the actuator by the main exhaust valve.