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Should you be riding a Harley-Davidson motorbike you must understand it is motorized from a twin cylinder, alternating piston, internal fusion motor. Alternating pistons usually means the pistons go top to bottom, or to and fro, or laterally depending on motor settings. Several variables evaluate the efficiency of the bike's motor however, one of the most important is the compression rate on the cylinder/piston/head construction. The higher the compression rate is, the greater bang or force for every cylinder, up to a point. A reciprocating piston motor provides horsepower by burning an air-gasoline mix to drive the piston down in the cylinder. This straight line push is called the power stroke. The linear movement of a connecting rod-piston fitting is transferred to the flywheel, which usually turns the straight line movement to circular action. This circular motion will then be utilized in the transmission, and also on to the back end wheel, generating forward motion. Looks very simple, but in reality might be more complicated. The pistons inside a Harley-Davidson V-twin are created to make a particular compression ratio from a specified use for optimum performance. Experience and history have trained H-D designers the best compression rates for bikes being operated on the road. To simplify things why don't we make use of a single cylinder motor as an example. A regular four-cycle single cylinder motor (half of a twin cylinder motor) works in 4 specific phases. That is why it is named a 4-cycle motor (or engine). During the intake cycle (1), air or gasoline is consumed by vacuum through the opened up intake valve as the piston goes down. Since the piston starts back up (2) the intake valve closes and then the gasoline and air blend is pressurized. As the piston reaches the top stroke the gasolone mix is fired by the spark plug then the piston is pushed downward strongly by the expanding fuel and air mix (3), creating the previously mentioned straight line movement that is converted by the flywheel into circular energy. When the piston comes back upwards (4), it forces the burned up mixture released (exhaust gases). which is known as the exhaust stroke. lf the compression rate is minimal, the motor generates minimal hp. lf the compression ratio is relatively high the motor can generate a whole lot more power for each cubic inch of displacement compared to a similar motor with a lower compression setting ratio. Several things affect the capability to be able to handle a motor with good compression, not the least of which is the use of high octane fuel. With no supply of high octane gasoline, a higher compression motor may be subjected to pre ignition (pinging), as a consequence of gas air mixture firing too early. Pre ignition can be hugely dangerous for the motor. Compression ratio is described plainly as the mass above the piston at bottom-dead-center (BDC), divided with the volume above the piston at top-dead-center (TDC). The higher compacted the fuel and air mixture is when burned the bigger the force. A stronger force indicates more power, together with additional stress on all the physical pieces included. Higher compression motors need the usage of high-octane gas to prevent pre-ignition and/or detonation, which may bring on costly problems on piston rings, pistons and valves or even even worse, losing the race. For regular cruising most trained technicians recommend a compression ratio around 8.5:1 and 9.5:1. Any higher and a higher octane fuel requirement is needed. With compression rates lower than 7:1 a motor can't run efficiently. Hopefully you now know what compression ratio means. However, this is only static compression ratio. Cam lift and valve overlap together with other elements determine the particular or functional compression ratio. In addition, remember that increased compression ratios while boosting power can also increase wear and tear on the motor. High compression motors are not good commuter motors, just like lower compression motors aren't excellent race motors. This year, bike runs will kick off from all over the country. A ton of riders will undoubtedly be congregate for a week of festivity all sharing their passion for motorcycles. You will enjoy many tales and building tricks to talk about with brand new buddies while you spend the days with the bike week. Ensure that you drive protected and wear the needed safety equipment like carbon fiber helmets. Best of luck and have a wonderful ride.
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