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If the motor pathway is intact, the arms should remain in this position equally. Patients with a slight weakness in one arm won't be able to keep the affected arm raised, and ultimately the palm may begin to pronate (palm facing down). Pronator drift indicates abnormal function of the corticospinal tract in the contralateral hemisphere.
A desmodromic valve is a reciprocating engine poppet valve that is positively closed by a cam and leverage system, rather than by a more conventional spring. The valves in a typical four-stroke engine allow the air/fuel mixture into the cylinder at the beginning of the cycle and exhaust spent gases at the end of the cycle. In a conventional ...
The combined center of mass does move slightly to the left when the rider leans to the right relative to the bike, and the bike leans to the left in response. The action, in space, would have the tires move right, but this is prevented by friction between the tires and the ground, and thus pushes the combined center of mass left.
An overhead valve engine, abbreviated (OHV) and sometimes called a pushrod engine, is a piston engine whose valves are located in the cylinder head above the combustion chamber. This contrasts with flathead (or "sidevalve") engines , where the valves were located below the combustion chamber in the engine block .
The word poppet shares etymology with "puppet": it is from the Middle English popet ("youth" or "doll"), from Middle French poupette, which is a diminutive of poupée.The use of the word poppet to describe a valve comes from the same word applied to marionettes, which, like the poppet valve, move bodily in response to remote motion transmitted linearly.
A two-cylinder engine with its cylinders aligned in two banks radiating out from the crankshaft, forming a V angle, is called a V-twin. The Ducati V-twin has the V tilted forward, so the front cylinder is nearly parallel to the ground, hence the term L-twin.
A Honda Super Cub engine. The most popular motorcycle in history, with over 100 million produced. A motorcycle engine is an engine that powers a motorcycle.Motorcycle engines are typically two-stroke or four-stroke internal combustion engines, but other engine types, such as Wankels and electric motors, have been used.
This sense of drift is not to be confused with the four wheel drift, a classic cornering technique established in Grand Prix and sports car racing. [citation needed] As a motoring discipline, drifting competitions were first popularized in Japan in the 1970s and further popularized by the 1995 manga series Initial D. Drifting competitions are ...