WHEELS, TIRES AND BRAKES
1. Measure the thickness at several points
around the disc with vernier calipers or a
micrometer (Figure 64). The disc must be
replaced if the thickness, at any point, is less
than the limit in Table 1.
2. Check the disc runout with a dial indicator.
Raise the wheel being checked and set the arm
of the dial indicator against the surface of the
disc (Figure 65) and slowly rotate the wheel
while watching the indicator. If the runout is
greater than specified in Table 1, replace as
Front Hub Disassembly
in this chapter for brake disc
replacement. Check the disc runout after
installing the disc.
models are equipped with a
single leading shoe drum brake at the rear
wheel. This type of brake has a single brake
actuating cam. one "leading" shoe that does
most of the work and one "trailing" shoe that
does less work.
When removing wheels with d r u m
brakes or when working on drum brakes,
be extremely careful not to inhale any of
the dust from the brake linings. The
brake linings contain asbestos fiber;
asbestos has been connected with lung
scarring a n d cancer. Do not use
cornpressed air to clean the drum or
linings. D u m p a n y dust onto a
newspaper and dispose of it in the trash.
Wash your hands after handling the
1. See Figure 66. Remove the wheel from the
motorcycle a s described in this chapter.
Remove the backing plate and brake assembly
as a unit from the hub.
2. Remove the brake shoes and springs by
prying them off with a screwdriver (Figure 67).
Make a mark across the brake cam end and
the arm so that the arm can be reinstalled in the
original position, then remove the pinch bolt
and brake arm (Figure 68).
4. Remove the brake cam (A. Figure 69).
5 . Thoroughly clean the brake cam and
Drurn B r a k e Inspection
described in this chapter.
7. T o assemble t h e brake, reverse this
procedure. Note the following:
a. Lubricate the brake shoe pivot (B, Figure
69), the brake cam face and the groove
around the shaft (A) with a small amount
of high-temperature grease. Be careful
not to contaminate the brake linings or
b. Install the dust seal on the brake cam
shaft (Figure 70) and install the wear
indicator so that it points to the far right
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