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Dirtbikes
There are several different kinds of off-road bike,
but they share many design features: |
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Dirtbikes and Enduros
* Light weight, small engine
* Long suspension travel and high ground clearance
* Simple, rugged construction with little bodywork
and no fairing
* Large wheels with knobby tires, often clamped to
the rim with rim-locks
* Lack of street-equipment (e.g. turn signals)
These bikes are designed to be ridden through rough
and muddy terrain. The types of off-road motorbikes
include single-cylinder two-strokes and
single-cylinder four-strokes in both air- and
water-cooled varieties. The four-strokes are gaining
popularity in this category, with the advent of high
performance, water-cooled engines. Typical engine
sizes range from 50 cc to 150 cc (for young riders),
250 cc, 400 cc and 650 cc (for olders riders). These
bikes are commonly referred to as dirtbikes, and
many people ride them simply for fun and recreation.
They can also be optimized for various competitive
sports: motocross, enduros, and time or speed
trials.
Trials bikes are a special subset of off-road bikes.
They are very small (no more than 250 cc), and very
light (often having no seat). They are used in
motorcycle trials.
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