When Replacing the Carburettor always rent the slides and cables into position
before re-fitting this to the engine, otherwise difficulty will be experienced in locating the
throttle needle valve into position in the carburettor. When replacing the carburettor it
will be noticed that no flange washer is used, merely make sure that both the faces are clean
and smear with shellac jointing compound. It is essential to refill or " prime " the oil pipes
with oil when re-assembling the engine to ensure that oil is fed to all bearings when the
Engine is started up. Should it ever be necessary to replace a tensioner blade, first disconnect
all oil pipes and remove the camshaft drive cover ; the drive is then visible. First unhook the
tensioner blade spring at the top, and the blade and spring can then be withdrawn from the
bottom peg; when replacing verify that the spring eye locates in its groove half way along the
bottom peg. The top eye of the spring also fits into a groove in the blade pin at the top.
If it is ever necessary to remove the engine from the frame, time will be saved by
removing the engine and gearbox unit complete. To do this remove the two top front engine
bolts, slacken off the others, take out the two bolts running through the gearbox plates and
saddle pillar down tube, and providing all the other connections have been disconnected
the complete unit can be taken away.
Ignition Timing.—See Magneto and Magdyno.—Pages 18 and 19
Important.—Only adjust the valve lifter lever cable enough to raise the exhaust
valve very slightly from its seat, particularly if a high compression piston is fitted in the engine.
—9—
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