Mongoose BMX - Adjusting The Headset

4 Adjustments
46
Figure 4.22
ADJUSTING THE HEADSET
The headset is an assembly of parts that connects the front fork
and the head tube of the frame. It is the rotaonal interface
that enables the fork to turn. There are two types of headsets:
threaded and threadless.
Adjusng a Threaded Headset
A typical threaded headset consists of two cups that are pressed
into the top and boom of the head tube. Inside the two cups
are bearings which provide a low fricon contact between the
bearing cup and the steerer. The short tube through which the
steerer of the fork passes is called the head tube.
Adjustment of the headset is needed if the headset is too loose
(shakiness), too ght (sness). Note: It is possible that the
bearings have become worn or damaged and cause sness.
Replacement of the parts may be necessary.
Conduct the following checks to determine if there is play in the
headset:
❶ Shakiness: Apply the front brake and push the handlebars
back and forth, front to back. Or if the bicycle is on a
workstand and the front wheel removed, push and pull on
the forks. If you feel a knocking sensaon or "clunk" it
means the headset is too loose. Figure 4.22
❷ Sness: Li the front of the frame so the front wheel is
o the ground. The handlebar and wheel should op to
one side or another. If there is drag or binding the headset is
too ght.
Headset
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2