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Cycle

Typically 2- or 4-stroke.

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Two-strokesearch for term

Two-stroke engines are notable over equivalent four-strokes in that they are lighter, mechanically simpler, produce higher power-weight. In the USA, two-stroke road-bikes are appearing to be less common due to emissions standards. Most 2-stroke bikes are under 500cc. 2-stroke engines have a more pronounced powerband (than 4-strokes) although some exhaust power-value systems can extend the band.

Four-strokesearch for term

4-stroke engines typically operate at lower RPMs and wider powerband range than 2-strokes.

Detailed definition of Four-stroke