A.J.S. 16MS, Instruction Book

Page: 50 / 94

MAGNETO CHAIN ADJUSTMENT
The magneto platform hinges on one of its fixing bolts. This provides sufficient move-
ment for adjustment to the magneto driving chain.
Tighten magneto chain by :
Remove magneto chain case cover.
Slacken nut on rear bolt supporting magneto platform.
insert a screwdriver under that end of the magneto platform and lever upwards until
the chain tension is correct.
The chain whip should be about ¼".
Tighten nut on platform supporting bolt.
Re-check chain tension.
Place a supply of grease on magneto driving chain and using a broad pen knife blade or
thin strip of metal work well into the interior of the auto ignition advance unit a generous
quantity of either Mobilgrease No. 2 or Esso Fluid Grease.
Replace magneto chain cover.
ENGINE SHOCK ABSORBER
The engine shock absorber is a spring device for smoothing out the engine impulses.
The engine sprocket is a free fit on the driving side flywheel axle. It has, integral with it,
a face cam that engages with a similar face cam (" shock absorber cam ") which is keyed
to the driving side flywheel axle by splines. A spring keeps the shock absorber cam in
close engagement with the cam on the sprocket, and, the shock absorber cam being
driven by the engine, over-rides the sprocket cam under the influence of the engine
impulses. The shock absorber spring is compressed by the over-riding of the cams,
thereby absorbing the shocks.
it is essential the faces of the cams are adequately lubricated otherwise the shock absorbing
action will be nullified and this is automatically taken care of, providing the level of the
oil in the front chaincase is maintained according to the instructions given in the
" Lubrication Section."
The shock absorber spring is retained by a cap washer and a retaining bolt which must
be fully tightened.
The dynamo sprocket is integral with the engine sprocket.
Behind the engine sprocket (between the sprocket and the crankshaft ball bearing)
is a spacing collar which is a sliding fit on the driving side flywheel axle and in no circum-
stances must this be omitted.
NOTE—At the first sign of transmission harshness examine front chaincase for correct
oil level, and dismantle and lubricate the shock absorber parts if the harshness
continues. For access to the shock absorber parts it is necessary to remove
the outer half of the front chaincase.
The order of assembly of the engine shock absorber is
1 The spacing collar between the crankshaft bearing and the engine sprocket.
2 The engine sprocket.
3 The shock absorber cam.
4 The shock absorber spring.
5 The cap washer.
6 The retaining nut.
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