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Exhaust System and Final Drive
II' Check that the exhaust mountings are
secure and that the system does not foul any
of the rear suspension components.
II' Start the motorcycle. When the revs are
increased. check that the exhaust is neither
holed nor leaking from any of its joints. On a
linked system. check that the collector box is
not leaking due to corrosion.
Steering and Suspension
!!
:
tester will ~
a check of the steering head
.
Steering
bearing lower ~
by mounting the front wheel
Front suspenSIon
on a surface plate, then performing a lock to
lock check with the weight of the machine on
the lower bearing (see illustration 3).
II' With the front wheel raised off the ground, II' Grasp the fork sliders (lower legs) and
II' With the motorcycle off the stand, hold
rotate the steering from lock to lock. The
attempt to push and puli on the forks (see
the front brake on and pump the front forks up
handlebar or switches must not contact the
illustration 4). Any play in the steering head and down (S88 illustration 5). Check that
fuel tank or be close enough to trap the rider's bearings wili be felt. Note that in extreme they are adequately damped.
hand. Problems can be caused by damaged cases, wear of the front fork bushes can be
II' Inspect the area above and around the
lock stops on the lower yoke and frame, or by
misinterpreted for head bearing play.
front fork oil seals (see Illustration 8). There
the fitting of non-standard handlebars.
II" Check that the handlebars are securely should be no sign of oil on the fork tube
II' When performing the lock to lock check, mounted.
(stanchion) nor leaking down the slider (lower
also ensure that the steering moves freely II' Check that the handlebar grip rubbers are
leg). On models so equipped, check that there
witOOut drag or notd1iness. Steering mov«nent secure. They should by bonded to the bar left
is no oil leaking from the anti-dive units.
can be impaired by POOI1y routed cables, or by
end and to the throttle cable puliey on the
II' On
models with
swing arm front
overtight head bearings or worn bearings. The right end.
suspension, check that there Is no treeplay in
the linkage when moved from side to side.
Front wheel mounted on a surface plate
for steering head bearing lower race check
Hold the front brake on and pump the front
forks up and down to check operation
MOT Test Checks REF-?
II' Note that the exhaust decibel
level
("loudness" of the exhaust) is assessed at the
discretion of the tester. If the motorcycle was
first used on or after 1st January 1985 the
silencer must carry the BSAU 193 stamp, or a
marking relating to its make and model, or be
of OE (original equipment) manufacture. If the
silencer is marked NOT FOR ROAD USE,
RACING USE ONLY or similar. it will fail the
MOT.
Final drive
t! On chain or belt drive machines. check
that the chain/belt is in good condition and
does not have excessive slack. Also check
that the sprocket is securely mounted on the
rear wheel hub. Check that the chain/belt
guard is in place.
t! On shaft drive bikes. check for oil leaking
from the drive unit and fouling the rear tyre.
Rear suspension
tI' With the motorcycle off the stand and an
assistant supporting the motorcycle by its
handlebars. bounce the rear suspension (see
illustration 7). Check that the suspension
components do not foul on any of the cycle
parts and check that the shock absorber(s)
provide adequate damping.
Checking the steering head bearings
for freeplay
Bounce the rear of the motorcycle
to check rear suspension operation
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