Yamaha GT1 Service Manual page 54

CHASSIS -
Front Wheel
71
Raise the front of the machine and set it on a
box. Then remove the wheel assembly.
Fig. 5-1-8
B. Checking
1 I
Run out of the rim
As shown in Fig. 5-1-9, measure the runout of
the rim with a dial gauge. Run out limits:
2 mm {0.07 in.) or less.
0
/Dial gauge
/ Max. 2 mm (0.07 in.)
I
0
Fig. 5-1-9
2)
3)
-48-
Brake shoe
Measure the outside diameter at the brake shoe
with slide calipers. If it measures less than
106 mm
(4:
17 in.I, replace it. Smooth out a
rough shoe surface with sandpaper or with a
file.
Fig. 5-1-10
Brake drum
Oil or scratches on the inner surface of the
brake drum will impair braking performance
or result in abnormal noises. Remove oil by
wiping with a rag soaked in lacquer thinner or
solvent. Remove scratches by tightly and
evenly rubbing with emery cloth.
Fig. 5-1-11