শুক্রবার, ৯ সেপ্টেম্বর, ২০১১

Motorcycle Specifications ? Definitions of Terms Motorcycle ...

The following provides definitions of terms to demystify motorcycle specifications as usually listed in the motorcycle magazines and on Internet Web sites. These definitions of terms should be easier to understand by riders who would rather ride than learn the technical complexities of their machines. These definitions of terms Should Be Easier to Understand by WHO riders would rather ride than learn the technical complexities of Their machines. Bear in mind that whole books could be written about each term. Bear in mind That Could be whole books written about each term. We are only touching the basics. We are only Touching the basics.

The following message, posted on a motorcycle forum that I used to run, was the motivation for me to provide these definitions of terms used in motorcycle specifications. The following message, posted on a motorcycle forum that i used to run, was the motivation for me to Provide these definitions of terms used in motorcycle specifications.

    ?OK, I admit I am probably the polar opposite of a gearhead, whatever that is. But yesterday, I had an eleven-year-old grilling me about my bike, and I suddenly realized that I could probably compute this stuff if someone would translate it into non-gearhead language for me. I have the stats for my bike in front of me. What do they mean? I would really appreciate a translation that lies somewhere on the technical jargon continuum between ?it goes really fast when you turn the throttle? and what appears in these specs.? ?OK, I admit I am Probably the Polar Opposite of a gearhead, whatever That Is. But yesterday, I had an eleven-year-old grilling me about my bike, and Suddenly I realized That I Could Probably compute this stuff if someone would translate it into a non-gearhead language for me. I have the stats for my bike in front of me. What do They mean? I would really appreciate a translation That lies somewhere on the continuum of technical jargon of the between ?it goes really fast you turn Pls the throttle ?and what Appears in these specs. ?

To help this forum member and probably countless others seeking to learn more about their bikes, I?m supplying these definitions of terms used in typical motorcycle specifications. To help this forum member and Probably countless others seeking to learn more about Their bikes, I?m supplying these definitions of terms used in typical motorcycle specifications.

Engine: Engine:

  • Type: Type:
    • No. No. of Strokes: Engines in motorcycles discussed on this site are all four-stroke. of strokes: Engines in motorcycles discussed on this site are all four-stroke. There are two-stroke engines as well. There are two-stroke engines as well. Also, don?t confuse four-stroke with four-cylinder or two-stroke with two-cylinder. Also, do not confuse four-stroke with four-cylinder or with two-stroke two-cylinder. They are totally different. They are totally different. The four strokes in a four-stroke engine are defined as follows: The four strokes in a four-stroke engines are defined as follows:
      • Stroke 1 ? Intake valve(s) open, piston moves down, sucking in the air/fuel mixture. Stroke 1 ? Intake valve (s) open, piston moves down, sucking in the air / fuel mixture.
      • Stroke 2 ? All valves closed, piston moves up, squeezing the mixture. Stroke 2 ? All valves closed, the piston moves up, squeezing the mixture.
      • Stroke 3 ? All valves still closed, spark plug ignites the fuel/air mixture, pushing the piston down. Stroke 3 ? All valves still closed, the spark plug ignites the fuel / air mixture, pushing the piston down.
      • Stroke 4 ? Exhaust valve(s) open, piston moves up, blowing the old charge out the exhaust valves. Stroke 4 ? Exhaust valve (s) open, piston moves up, blowing the old charge out the exhaust valves.
      • A short version is Suck, Squeeze, BANG, and Blow. A short version is Suck, Squeeze, Bang, and Blow.
    • Cooling: An engine can be liquid-cooled by running coolant through the engine and exchanging the heat via a radiator like a car. Cooling: An engine can be liquid-cooled by running coolant through the engine and exchanging the heat via a radiator like a car. It can also be air-cooled by airflow over fins on the engine. It can also be water-cooled by airflow over fins on the engine. Another variation is oil-cooling where engine oil is circulated in the engine and its heat exchanged by a small radiator. Another variation is where engine oil, cooling oil is circulated in the engine and its heat exchanged by a small radiator. There are even oil/air/fan cooling systems. There are even oil / water / fan cooling systems.
    • Valves: Valves are used as mentioned above. Valves: Valves are used as Mentioned above. There may be one or more valves used for intake and exhaust. There may be one or more valves used for the intake and exhaust. The specs may indicate how many valves are used per cylinder or for the whole engine. The specs may indicate how many valves are used per cylinder or for the whole engine. Terms such as SOHC (Single OverHead Cam) and DOHC (Double OverHead Cam), etc. Such terms as SOHC (Single Overhead Cam) and DOHC (Double Overhead Cam), etc. are used to indicate how the valves are opened and closed. are used to indicate how the valves are opened and closed. There are other methods to operate the valves as well. There are other methods to operate the valves as well.
    • Number of Cylinders: Engines can have one to six cylinders. Number of Cylinders: Engines can have one to six cylinders.A single-cylinder engine, sometimes called a thumper, is used in small bikes. A single-cylinder engine, Sometimes Called a Thumper, is used in small bikes.

      Most bikes have engines with two-cylinders arranged in many configurations including: V-twin where the cylinders are spaced at a particular angle to each other; Parallel twin where the two cylinders are right next to each other in a vertical position; and Flat-twins where the two cylinders are opposed such as in BMW Boxers. Most bikes have two-cylinder engines with Arranged in many configurations including: V-twin where the cylinders are spaced at a particular angle to each other; Parallel twin where the two cylinders are right next to each other in a vertical position; and Flat- twins where the two cylinders are opposed Such as in the BMW Boxers.

      Engines may have more than two cylinders such as: Triples where three cylinders are lined up next to each other in a vertical position; In-line fours similar to a triple except with another cylinder added; V-4 engines such as used in Honda ST1300; V-6 engines such as used in Boss Hoss; Flat-six engines such as used in Honda Gold Wing 1500/1800s. Engines may have more than two cylinders Such as: triples where three cylinders are lined up next to each other in a vertical position; In-line fours similar to a triple except with another cylinder added; V-4 engines Such as used in the Honda ST1300 ; V-6 engines Such as used in Boss Hoss; flat-six engines Such as used in the Honda Gold Wing 1500/1800s.

      There are other engines not described. There are other engines are not described.

  • Displacement: Displacement is the volume displaced in the cylinders of an engine as the pistons move from their bottom position to their highest position in the cylinders. Displacement: Displacement is the volume displaced in the cylinders of an engine as the pistons move from Their bottom position to Their highest position in the cylinders. Displacement is measured in either cubic centimeters (CC) or cubic inches (CI). Displacement is Measured in either cubic centimeters (CC) or cubic inches (CI).
  • Bore and Stroke: Bore is the diameter of the cylinder in the engine in which a piston moves up and down. Bore and Stroke: Bore is the diameter of the cylinder in the engine in the which a piston moves up and down. Stroke is the distance that the piston moves up and down inside the cylinder. Stroke is the distance the piston moves That ups and downs inside the cylinder.
  • Fuel System: Either carburetor(s) or fuel injection is used to control the mixture of air and gasoline and prepare it to be sucked through the intake valves and into the cylinders during Stroke 1, described above. Fuel System: Either carburetor (s) or fuel injection is used to control the mixture of water and gasoline and prepare it to be sucked through the intake valves and into the cylinders During Stroke 1, described above. Specs usually identify the carburetor name and how many carburetors are used. Specs usually identify the name and how many carburetor carburetors are used. Fuel injection comes with different names such as Fuel Injection (FI), Digital Fuel Injection (DFI), Electronic Sequential Port Fuel Injection (ESPFI), Programmed Fuel Injection (PGM-FI), etc. Fuel injection comes with different names Such as Fuel Injection (FI), Digital Fuel Injection (DFI), Electronic Sequential Port Fuel Injection (ESPFI), Programmed Fuel Injection (PGM-FI), etc.
  • Compression Ratio: Here?s a definition from Motorcycles Forum moderator, Bill Wood: Compression Ratio: Here?s a definition from Motorcycles Forum moderator, Bill Wood:
      ?Think of Compression Ratio this way: When the piston is at the bottom of the cylinder, say you could pour 100cc of water into the sparkplug hole (both valves closed) and it would be full. When the piston is at the top of its stroke, you can only pour 10cc of water into the hole to fill it. The compression ratio would be 100 to 10 or 10 to 1. That?s about as easy to understand as I can make it. Oops, forgot to say ? Higher compression ratios (in general) will let the engine make more power, require higher octane gas and be harder for the starter to turn over.? ?Think of Compression Ratio this way: When the piston is at the bottom of the cylinder, say You Could pour 100cc of water into the sparkplug hole (both valves closed) and it would be full. When the piston is at the top of its stroke, you can only pour 10cc of water into the hole to fill it. The compression ratio would be 100 to 10 or 10 to 1. That?s about as easy to Understand as I can make it. Oops, forgot to say ? Higher compression ratios (in general) will let the engine make-more power, require higher octane gas and be harder for the starter to turn over. ?
  • Maximum Torque: Torque is described as twisting force. Maximum Torque: Torque is twisting force as described. This is the maximum amount of twisting force the engine can put out and at what value of engine Revolutions Per Minute (RPM). This is the maximum amount of twisting force the engine can put out and at what value of engine Revolutions Per Minute (RPM). Put simply, torque is the ?grunt, stretch your arms, push your eyeballs into their sockets? quality when you aggressively use the throttle and accelerate hard. Put simply, torque is the ?grunt, stretch your arms, push your eyeballs into sockets Their? quality Pls aggressively you use the throttle and Accelerate hard. The higher the number, the more forceful that feeling is. The higher the number, the more Forceful That feeling is.
  • Maximum Horsepower: This is the maximum amount of horsepower delivered by the engine. Maximum Horsepower: This is the maximum amount of horsepower delivered by the engine. It occurs at a particular engine speed. It Occurs at a particular engine speed. Horsepower (HP) and torque are interrelated with RPM by the formula HP = TORQUE X RPM / 5252. Horsepower (HP) and torque are interrelated with RPM by the formula HP = TORQUE X RPM / 5252.
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