be due to lateral movement caused by wear on the black fork bushes. The
movement can be detected also by jacking up the front wheel clear of the
ground when, by raising and lowering the front wheel, the movement will
show up. Replace the bushes to rectify.
It is rare for the steel bushes to be affected, providing the fork oil con-
tent is not contaminated by abrasive. When replacing the bushes make
sure the inside of the fork tubes is perfectly clean.
Indifferent steering. If the machine is inclined to steer in an elongated
figure of eight, this denotes unwanted friction in the steering which can
be due to:
(1) Steering head bearing over tightened.
(2) There is friction, which cannot be released if a steering damper is
used.
(3) The steering head bearing is unduly loose and the fork stem is
rubbing against the inside of the ball race.
(4) The ball races are pitted, as a result of driving with a loose bearing
adjustment (see 'Steering head adjustment').
In the case of (2) take out the bolt securing the steering damper plate
to the frame. If the friction is removed, use washer(s) between the plate
and the lug on the frame.
Handlebars oscillate at low road speed. This trouble is not associated
with the front forks, or wheel alignment. If the handlebars oscillate or
'wobble' at low road speeds and stops as the road speed increases, this is
due to either one or both tyres not running true with the wheel rim and
invariably becomes manifest after the tyres have to be changed. In the
main the front tyre is responsible.
Oil leaks from forks. First try the effect of tightening the slider extension
(7) to compress the oil seal against the bush. If the leakage persists, re-
place the oil seal (8).
Should the leak take place at the lower end of the fork slider (15) check
the damper tube bolt (31) and its washer for security.
Loose head lamp brackets. The top fork cover tube (20) with lamp
bracket incorporated is compressed between the handlebar lug (41) and
the fork crown (39) with a rubber packing ring (18) interposed. If the
rubber ring deteriorates or collapses, the tension on the tube will be re-
duced. Usually the trouble can be rectified without completely dis-
mantling the front forks, by using a fork spring leather washer 021116 for
each cover tube as packing.
Release the two nuts (45 and 46).
Tap upwards The handlebar lug (41).
Make a cut across one side of the washer and feed it round the fork
tube, between the rubber and the fork crown. A little soapy water will
assist the washer to slide over the rubber.
Re-align the head lamp and tighten the two nuts.
Head lamp beam. If the lamp beam is out of parallel to the machine.
thump the head lamp shell with the heel of the hand in the required
direction.
Bent fork inner tubes (17). The fork tubes can be straightened providing
the set does not exceed 10° out of true.
72
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