An internal combustion engine (10) includes a crankcase (30), a cylinder (60), a piston (50), a crankshaft (20), and a piston connecting rod (80). A counterweight (120) connects to the crankshaft through a counterweight connecting rod (130). The counterwei...

A vehicle includes an engine that powers a wheel through a drive train. The drive train includes a continuously variable transmission (CVT) and toothed gearing disposed between the CVT and the wheel. A release clutch is also disposed between the CVT and th...

A four cycle engine having at least one cylinder (4A,4B) unit is disclosed. The engine includes a continuously variable transmission (CVT) (11) connected to the engine on one side of the engine. An air box is also provided that is located on the same side ...

A vibration and noise dampening connection mechanism for securing at least two components together having a simplified construction is disclosed. A passageway is formed in one of the components with a milled thread having a runout. The end face of the bolt...

An air intake system (100) for an internal combustion engine has at least one air box (5) and a short duct for each cylinder. Each duct can be extended to provide higher torque at low speed. At high speed, the shorter duct length can be selectively provide...

A light weight piston for an internal combustion engine is disclosed that minimizes the stresses found in a transition area between the piston head and the associated piston pin bosses while maintaining a flexible soft connection between the piston skirts ...