FIG 6 Setting the ignition timing (Heavyweight)
re-fit the plate with the two scribed lines in register, and firmly tighten
the fixing screws.
As the ignition timing is important, a re-check should be made, before
re-fitting the sparking plug, rocker cover, etc.
MAGNETO IGNITION
To re-time the ignition. The normal advance is 39° (½").
Have available a stout screwdriver, or an old type tyre lever with
turned up end, also a small rod or stout wheel spoke 5½" long.
Before setting the ignition firing point it is essential the magneto
contact breaker points are correctly adjusted. Therefore always check
these first.
Check contact breaker points by:—
Expose contact breaker by removing moulded end cover of magneto
(secured by 3 captive screws).
Check setting of contact breaker points and, if necessary, re-set same.
Set ignition firing point by
Remove:—
The sparking plug high tension cable from plug.
The sparking plug.
The magneto chain case cover.
The rocker box side cover.
Unscrew, several turns, nut retaining magneto sprocket to camshaft.
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