4/19/2023 0 Comments Thumper definition![]() “Good ergonomics” refers to how well a motorcycle fits a rider for its intended use.įairing - Bodywork and/or windshield at the front of the motorcycle designed to deflect the wind. Also known as the “kill switch.”Įrgonomics - The study of body posture, and the positioning of instruments, to create a good human-to-machine interface. Also known as dual-purposeĮngine cut-off switch - Usually located on the right handlebar switch housing, this switch allows the motorcyclist to turn off the engine without removing his or her hand from the handlebar. Not as focused as pure off-road or pure street motorcycles. (See also: Bagger)ĭual-sport - Street legal motorcycles that provide varying levels of off-road capabilities. Two cams allow more precise control than one.ĭresser - (also full dresser) Typically, a large motorcycle that is designed for long-distance touring, especially with luggage and a windshield. Two camshafts found in the head or top of the engine that open and close the valves. Generally, the larger the displacement, the more powerful the motor.ĭOHC - Dual Over Head Cams. This is usually expressed in cc (cubic centimeters) or ci (cubic inches). This style of bike predominantly stems from the customizing of standard American motorcycles in the ’60s and ’70s.ĭisplacement - The size of the engine specifically, the total volume found in the cylinders. This lowers a rider’s upper body on the front of the motorcycle for a racier body position.Ĭounterbalancer - A weight in the engine that spins with the rpm to smooth out engine vibrations.Ĭountersteering - The input a motorcyclist gives to the handlebars in order to steer: push the right handlebar to go right, or push the left handlebar to go left.Ĭruiser - A style of motorcycle generally equipped with a low seat and pullback handlebars. Today, this name generally applies to custom built motorcycles that may have a rigid frame (no rear suspension), an extended fork, and a stretched or elongated appearance.Ĭlip-ons - Handlebars that are clamped around the top of the fork tubes, rather than bolted to the top triple-tree. (See also: Horsepower and Torque)Ĭam - A metal shaft with oval “lobes” that rotates to open the valves in a four-stroke engine.Ĭarburetor - A mechanical device found on the intake side of the engine which mixes fuel and air to create the volatile mixture that gets ignited in the engine.Ĭhopper - Originally, a motorcycle that has had all non-essential parts removed (or “chopped”) to make it lighter and faster. The term comes from the resemblance of fists coming towards each other.īrake Horsepower (BHP) - Although theoretically equal to standard horsepower, “brake” horsepower specifies that a specific engineering process was used to arrive at that horsepower number. ![]() The system then modulates the brakes at that point with the idea of stopping you faster than you could yourself.Īftermarket - Any items or accessories you buy that are not from the Original Equipment Manufacturer.Īpex - The middle or center point of a turn.Īnti-Dive system - A front-end suspension component that reduces how much the forks compress under braking, popular in the late 1980s, but seldom used now.īagger - A motorcycle with touring accessories like saddlebags, top box, a trunk, etc.īoxer Twin - A horizontal engine configuration with the two pistons opposing each other, commonly found on BMW twin-cylinder motorcycles. A component added to the braking system that detects wheel lock up. ![]() Here’s a quick primer.ĪBS - Antilock Brake System. ![]() Fact is, the names and terms have just evolved over the years to describe the sport of motorcycling. To some, motorcyclists sound like they are speaking a second language. ![]()
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