Sportbike

Sportbikes are entry-level, performance oriented motorcycles designed for street use. They are typically economical to own and operate.

SAE J2825 Standard

The Society of Automotive Engineers (SAE) International has produced a simple, consistent and economical sound test standard that can be used to determine whether a streetbike (on-highway motorcycle) exhaust system emits excessive sound, the American Motorcyclist Association (AMA) reports.
The J2825 “Measurement of Exhaust Sound Pressure Levels of Stationary On-Highway Motorcycles,” issued by the SAE in [...]

Screw Extractor

A screw or bolt extractor is a device used to remove broken bolts, screws and fasteners. They are available from most motorcycle and automotive stores.

Short Circuit

An electrical failure in which the current flow bypasses (takes a shortcut before) the resistance of the load and goes directly to ground. Short circuits can result in blown fuses, melted wires and damaged components.

Specific Gravity

Refers to the relative weight of a fluid as compared to an equal volume of distilled water. It is common to check the specific gravity of engine coolant and battery electrolyte to determine if they are within specification using a tool called a hydrometer. There’s even a type of hydrometer that tells you when your [...]

Stroke

When the piston in a motorcycle engine moves from TDC (Top Dead Center) to BDC (Bottom Dead Center) or from BDC to TDC – the distance traveled is referred to as the stroke. The stroke takes one half of a revolution of the crankshaft.

Steering Damper

A device which uses mechanical or hydraulic friction to reduce motorcycle steering oscillation at high speeds.

Single-leading Shoe Drum Brakes

A drum brake system having two brake shoes; one shoe is leading and one is trailing. The leading shoe wedges itself into the drum, providing more braking action than the trailing shoe.

Single Cradle Frame

A motorcycle frame that has one down tube from the steering neck to the front of the engine.

Shift Drum

A shift drum is a cylindrical shaped transmission component with machined slots around its outside diameter. When actuated by the external shift mechanism it moves the the internal shift forks. As the shift drum is rotated, drum slots cause the shift forks to move sliding gears or dogs, causing the engagement and disengagement of various [...]

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