Handlebars - Dynacraft SINGLE SPEED Owner's Manual

FIGURE X
WARNING
A loose stem bolt can cause a loss of steering
control and result in serious injury or death. The
Stem must be tight enough for the wedge nut
to bite into the inner surface of the steer tube.
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53
ASSEMBLY

HANDLEBARS

Most of our bikes are equipped with a "quill" stem (figure X). To
assemble the handlebars remove the protective cap from the wedge
end of the stem bolt and loosen the bolt using the 6 mm Allen key.
Some models may use a 13 mm hexagonal bolt instead of an Allen
key bolt. Place the handlebar stem into the top of the steer tube
which is the top end of the fork that has been inserted into the
head tube at the factory, ensuring that all cables are free of tangles.
Tighten the stem bolt observing the Minimum Insertion Mark and
checking that the forks and the handlebars are facing forward. After
the stem bolt is tested tight (see Important Note below), adjust
handlebars to correct position. After the handlebar stem has been
fitted into the steer tube that is the top end of the fork and the two
pieces made firm with in the head tube the action of a stem bolt
upon the wedge nut binds with the inside of the steer tube to form a
solid steering column.
IMPORTANT NOTE: Test the security of the handlebar stem
within the steer tube of the front fork by clamping the front
wheel between your knees and trying to move the handball
and/or stem from side to side. The handlebar should not move
independent from the front wheel when applying pressure.
You can adjust the handlebar height a bit by adjusting stem
height. A quill stem has an etched or stamped mark on its shaft
which designates the stem's "Minimum Insertion" or "Maximum
Extension". This mark must not be visible above the headset. There
are different styles of handlebar clamps, but all attach to the bicycle
with a stem bolt and wedge nut. Typical of the BMX bicycle is the
four bolt pillow block configuration shown above. See page 83 for
adjustment of this binder.