Chapter 5 Wheels, brakes and tyres
Refer to Chapter 7 for information relating to the
on Brazilian models
Contents
.
General description 1
Front wheel : examination and renovation 2
Front wheel: removal 3
Front brake: examination and renovation 4
Adjusting the front brake 5
Front wheel bearings: removal and replacement 6
Front wheel : replacement 7
Rear wheel : examination 8
Rear wheel : removal 9
Rear brake : examination and renovation
Rear wheel bearings : removal and replacement ...
Rear sprocket and shock absorber rubbers : examination
and renovation 12
Adjusting the rear brake 13
Final drive chain : examination, adjustment and lubrication 14
Rear wheel: replacement 15
Tyres : removal and replacement 16
Fault diagnosis 17
Specifications
Wheels
Rim size
Front
Rear
Rim maximum runout — radial and axial 2.0 mm (0.0787 in)
Spindle maximum warpage 0.2 mm (0.0079 in)
Brakes Standard
Drum inside diameter 1 10 mm (4.3307 in)
Brake shoe friction material thickness 3.9 - 4.1 mm
(0.1535 - 0.1614 in)
Tyres Front
Size ... 2 . 5 0 - 1 8 4PR
Pressures — tyres cold
Solo 25 psi (1.75 kg/cm
2
)
Pillion 25 psi (1.75 kg/cm
2
)
Manufacturer's recommended minimum tread depth 1.5 mm (0.06 in)
Wear limit
1 1 1 mm (4.3701 in)
2.0 mm (0.0787 in)
Rear
3 . 0 0 - 17 6PR
28 psi (2.00 kg/cm
2
)
40 psi (2.80 kg/cm
2
)
2.0 mm (0.08 in)
1 General description
All machines are equipped with two identical single leading
shoe
brake units, the drums being integral with the wheel
hub.
On all models, chromium plated steel wheel rims are laced
to the hub by spokes, the front and rear rims being of
in and
17 in diameter respectively. The front rim carries a
in
section tyre, while the rear fitment is of 3 0 0 in section.
2 Front
examination and renovation
1 Place the machine on the centre stand so that the front
wheel is raised clear of the ground. Spin the wheel and check
the rim alignment. Small irregularities can be corrected by
tightening the spokes in the affected area, although a certain
amount of practice is necessary to prevent over-correction. Any
flats in the wheel rim should be evident at the same time. These
are more difficult to remove and in most cases it will be
necessary to have the wheel rebuilt on a new rim. Apart from
the effect on stability, a flat will expose the tyre bead and walls
to greater risk of damage.
2 Check for loose or broken spokes. Tapping the spokes is the
best guide to tension. A loose spoke will produce a quite
different sound and should be tightened by turning the nipple in
an anti-clockwise direction. Always re-check for run-out by
spinning the wheel again. If the spokes have to be tightened an
excessive amount, it is advisable to remove the tyre and tube by
the procedure detailed in Section
of this Chapter; this is so
that the protruding ends of the spokes can be ground off, to
prevent them from chafing the inner tube and causing
punctures.
