Base 50

{{Short description|Type of Honda engine}}

{{Confuse|Base 50 (numeral system)}}

{{Use dmy dates|date=June 2020|cs1-dates=y}}

{{Infobox Motorcycle

|name = Honda 50cc engine

|image = File:Honda super cub, 1st Gen. 1958, Left side.jpg

|caption = The Honda 50cc was first offered in the Honda Super Cub seen here.

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|production = 1958-present

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|assembly = 15 countries worldwide

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|class = Motorcycle, scooter, moped, ATV, ATC, pit bike, dirt bike and various power sport machines.

|engine = Horizontal {{Convert|49|–|124|cc|abbr=on}} 4-stroke air-cooled single

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|transmission = 3- or 4-speed automated manual with wet multi-plate centrifugal clutch

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|dry_weight = {{convert|2|–|3|kg|abbr=on}}

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|related = Lifan Group

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}}

A Base 50 engine is a generic term for engines that are reverse-engineered from the Honda {{Convert|49|cc|abbr=on}} air-cooled four-stroke single cylinder engine. Honda first offered these engines in 1958, on their Honda Super Cub 50. Honda has offered variations of this engine continuously, in sizes up to {{Convert|124|cc|abbr=on}}, since its introduction. The Honda Super Cub has been produced in excess of 100,000,000 units, the most successful motorized vehicle in history.{{cite web |url=https://www.cycleworld.com/honda-super-cub-motorcycle-history-classics-remembered/ |title= Super Cub History |website=cycleworld.com |publisher=Cycle World |access-date= 17 May 2020}} With multiple manufactures utilizing clones of the Honda 50 engine for current mopeds, scooters, small motorcycles and power sport machines, it is the most produced engine in history.

The engines are usually identical in form, fit and function to Honda 50cc engines and the parts are usually interchangeable with genuine Honda parts.

The term Base 50 has originated from the importation of modern styled, small Pit Bikes that use the Honda CRF50 as a base for design. Base 50's have also been known as Chondas, a slang term due to influx of Honda clone engines being primarily from China. The name, a portmanteau of "Chinese" or "clone", and "Honda", is seldom used in direct sales marketing.