slider, the seal will go over the bush without damage.
Refill with 70 c.c. of SAE. 30 oil.
NOTE—The fork tube bushes are silver soldered to the tubes 5¼" apart.
Steering head adjustment. With the machine on the stand, need for
adjustment of the steering head bearings may be detected by trying to
rock the forks with hands holding the fork legs. The bearings should be
tested for slackness after the first 200 miles and subsequently every 1,000
miles. Two spanners should be used, one turning the adjusting nut (34),
the other to slacken and retighten the lock nut when the adjustment has
been carried out.
Adjustment should be such that no play be felt, yet the bearings are
free to rotate and are not over tight-
Adjusting the bearings too tightly will ruin them and induce heavy
steering.
NOTE—It is important that adjusting and locking nuts are tightly locked
together.
Front Forks 350 c.c. Lightweight Model, CSR, also
250 c.c. Scrambler
The front forks fitted to these Models are virtually identical in design to
those fitted to the Heavyweight Models. The difference is confined to the
diameter of the fork inner tubes. Therefore, the assembly and mainte-
nance details given for the Heavyweight Models apply also to the Light-
weight counterpart.
REAR SUSPENSION UNITS
These are sealed units. Maintenance is confined to greasing the outside
diameter of the springs should a grating noise develop during movement.
The damper fluid filled is sufficient to outlast the life of the unit. Should
an oil leak develop, the damper unit must be exchanged.
Removing the units. Simply take out the top and bottom fixing bolts, the
unit will come away.
Removing the top cover tube. To do this the spring is compressed to
extract the split collets. Without the aid of a spring compressor tool, the
collets can be removed with the unit attached to the frame. The assistance
of a second person is required to press down the cover tube (compressing
the spring) and smartly prise out the collets. It may be necessary to deal
with one collet at a time. Alternatively, hold the top end of the unit in a
vice and use the first method.
Removing the rubber bushes. These are a press fit and can be extracted
without difficulty. To refit use a little water on the rubber, which will
facilitate entry without deterioriation of the rubber.
The cam ring adjuster. By applying less than half a turn to the stepped
cam (use spanner 023284) the suspension is corrected and retained to suit
the change of load. This also enables the head lamp beam to remain un-
altered.
TABLE OF REAR SUSPENSION SPRINGS
Model
250 c.c. Scrambler
Part
No.
043178
Free
length
8¼"
Colour marking
Green/Yellow/Green
…
84
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