Remove carburetter by:
Air filter connection.
Unscrew two carburetter retaining nuts.
Take away carburetter and lay aside.
Remove
The four bolts retaining cylinder head to barrel, and head is free to be taken away.
While doing this the push rod cover tubes will come away with the head.
NOTE—If the sparking plug resists removal, do not use force but brush penetrating oil
round the body and leave for a time to soak before making further effort.
TO REMOVE AND REPLACE THE VALVES AND GUIDES
Remove the cylinder head.
Remove the valve springs by inserting a finger in the spring coil and sharply pull upward.
The top spring collar and split collet can then be removed leaving the valve free to be
withdrawn.
A sharp light tap on the valve collar may be necessary to free the taper split collet. It
will be observed that the valve spring seat has a raised impression on its under side
which registers with a hole drilled on the valve guide boss to ensure accurate positioning.
To remove an inlet valve guide, thoroughly clean protruding end of guide to be removed.
Apply gentle heat and press guide downwards. To remove an exhaust valve guide,
apply gentle heat, press the guide upwards sufficiently to permit removal of the external
circlip. Then, clean the top of the guide, and press downwards to remove. Re-heat
when replacing and see that correct projection is obtained, viz. ½". Also see that oil
hole in guide is in correct alignment.
Illustration 14
Application of
valve spring compressor
1
2
3
4
COLLET, FOR VALVE.
COLLAR, FOR VALVE SPRING.
COLLAR, FOR VALVE SPRING.
BOLT THROUGH TOOLS AN D COILS OF
VALVE SPRING.
5
6
7
VALVE SPRING COMPRESSOR TOOL.
OIL PASSAGE FROM ROCKER BOX TO
INLET VALVE GUIDE.
SCREW WITH LOCK NUT ADJUSTING
OIL FEED TO INLET VALVE.
30
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