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UJM -
Universal Japanese Motorcycle - 1. Term given
to Japanese
motorcycles of the 80's, because visually they
all looked alike; an air cooled 550-750 inline-4
with straight tank and seat, until you were close
enough to read the tank emblems they looked
identical. 2. During the 1970 and early 1980's, the
Japanese became so indentified with the four
cylinder, standard style motorcycle that this term
was coined to describe those bikes.
Under Brake
- Failure to apply the
brakes to their full capability, resulting in a
longer than needed stopping distance. This is
usually caused by fear of the results of over
braking.
Undersquare
- Stroke greater than "bore". Usually produces more
horsepower but less torque than an oversquare engine
design.
Unitized
Transmission - A transmission (often
referred to as a "unit transmission") that is an
integral part of the engines bottom end.
Universal
joint - A method of transferring power from
the transmission to the rear wheel (ie. Chain drive,
Drive shaft, Belt).
Upside-down
forks - Telescopic forks in which the lower
section telescopes into the fixed upper tube. They
are sometimes referred to as inverted telescopic
forks on older
bikes.
Unsprung
Weight - Parts of the motorcycle below or not
supported by the suspension such as the rims and
tires.
Up-Sweeps
- This referred to the style of exhaust that would
run up along the side of the
bike at an angle often up to the sissy bar or as
far as the owner wanted.
Urban
Tumbleweed - Plastic grocery bags/sacks that
either fly up onto a hot
exhaust or into your face.
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