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2. Outboard motor - Wikipedia

   en.wikipedia.org/wiki/Outboard_motor

   Basic parts of an outboard motor. An outboard motor is a propulsion system for boats, consisting of a self-contained unit that includes engine, gearbox and propeller or jet drive, designed to be affixed to the outside of the transom. They are the most common motorised method of propelling small watercraft.

3. Petcock - Wikipedia

   en.wikipedia.org/wiki/Petcock

   Fuel petcock on a 1978 Yamaha XS400. Most older motorcycles have a three-position fuel petcock valve (known as a "petrol tap" in the UK) mounted on or nearby the fuel tank to control the supply of gasoline: on, off, and reserve. The reserve position accesses the bottom portion of the fuel tank.

4. Yamaha Motor Company - Wikipedia

   en.wikipedia.org/wiki/Yamaha_Motor_Company

   Another bike that was performance-oriented was the Yamaha RX-Z, introduced in 1985 as a two-stroke naked sport bike, related to the Yamaha RX-135 and Yamaha RD-135, borrowing its chassis and platform. Originally equipped with a five speed transmission and a solid front disc brake rotor with rear drum brakes, it was popular in Malaysia and ...

5. Fuel tank - Wikipedia

   en.wikipedia.org/wiki/Fuel_tank

   The average fuel tank capacity for cars is 50–60 L (12–16 US gal). [3] The most common materials for fuel tanks are metal or plastic. Metal (steel or aluminium) fuel tanks are usually built by welding stamped sheetmetal parts together. Plastic fuel tanks usually built using blow molding, which allows more complex shapes to be used.

6. Cylinder head porting - Wikipedia

   en.wikipedia.org/wiki/Cylinder_head_porting

   Cylinder head porting refers to the process of modifying the intake and exhaust ports of an internal combustion engine to improve their air flow. Cylinder heads, as manufactured, are usually suboptimal for racing applications due to being designed for maximum durability.

7. Cylinder head - Wikipedia

   en.wikipedia.org/wiki/Cylinder_head

   In sidevalve engines the head is a simple plate of metal containing the spark plugs and possibly heat dissipation fins. In more modern overhead valve and overhead camshaft engines, the head is a more complicated metal block that also contains the inlet and exhaust passages, and often coolant passages , Valvetrain components, and fuel injectors .