Motorcycle Glossary of Terms

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Earles forks - An unusual front fork design. A long leading link and rigid pivot through both links behind the wheel.

Easy rider - The famous motorcycle movie, released in 1969, starring Peter Fonda, Dennis Hopper, and Jack Nicholson.

ECU (Electronic Control Unit) - A computer which controls (for instance) an igniton system, or an anti-lock braking system.

EFI (Electronic Fuel Ignition) - A means of metering fuel into an internal combustion engine. EFI replaces carburettor as a fuel metering device.

EGO - Exhaust Gas Oxygen sensor. Sometimes called a Lambda sensor.

EMS (Engine Management System) - A computer controlled system which manages the fuel injection and the ignition system in an integrated fashion.

Endo - see stoppie.

Enduro - Off-road competition.

Ergonomics - Study of body posture and instrument positioning.

Expansion chamber - Section of two-stroke engine exhaust system so designed to improve engine efficiency and boost power.