SECTION G6
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RENEWING STEERING HEAD BEARINGS
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1971 and later models utilise saaled non
adjustable ball journal bearings with a spacer tube
to prevent the bearings being forced into the frame
head tube. On such models, after removal of the
forks as in Section G3, the bearing spacer tube
must be pushed to one side so that a drift can be
applied to the inner race of the bottom bearing and
the bearing driven out with care. The bearing
spacer will be released at the same time. By using
the drift from the other end of the steering tube
the second bearing can then be driven out.
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To replace the bearings, fit the bottom bearing
fully home into the housing absolutely square. Use
a should ered drift through the bearing to hold it
in line with the housing whilst abutting against
the outer race. Place the R spacer tube loosely in
position and drive the top bearing in to abut to
the spacer tube.
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As the fork yokes are assembled the bearings
will be pulled up to the spacer tube.
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1970 models used adjustable sealed ball
journal bearings and these had no spacer tube.
Removal and reassembly is similar to the sequence
usad on later models except that both bearings must
be fitted up to the abutments within the steering
head tube prior to assembly of the steering yokes.
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SECTION G7
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STEERING HEAD ADJUSTMENT
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1971 and later models - The steering head
bearing arrangement, where the bearings abut to a
centre spacer tube, is non-adjustable. The stem nut
fitted from beneath the lower yoke has a tab washer
to prevent slackoning.
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Pre 1971 models - The steering head
bearings take the form of ball journal bearings but
are adjustable when necessary. If there is play in
the steering head bearings the movement which takes
place when traversing rough roads or when the front
brake is applied will damage the bearings. To check
the adjustment, support the motor cycle under the
crankcase with the front wheel clear of the ground.
Stand astride the front wheel, grasp the fork legs
and attempt to move them backwards and for wards
against the steering head races. Movement will most
easily be detected by holding the fingers at the
joint between the fork and steering head tube
whilst checking.
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Adjusting Pre 1971 Steering Head Bearings
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1
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Slacken top nut (A) in Fig. G8 (this is
facilitated by removing the handlebar).
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2
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Release fixing nuts (B) to allow the fork tubes
to slide in the yoke
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3
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Using a Service Tool 060942, tighten adjusting
nut (C) a little at a time to take up play.
Continue to adjust until theforks turn freely from
lock to lock without binding.
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4
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When adjustment is correct, tighten nut (A),
clamping nuts (B) and refit the handlebars.
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