A.J.S. 16MS, Instruction Book

Page: 71 / 94

ELECTRICAL SERVICE
IGNITION
A Lucas magneto type SR-1 with automatic advance and retard is fitted to all Touring
models.
A Lucas racing magneto is fitted to all Competition models.
On the SR-1 magneto fitted to all Touring models, the contact breaker is exposed by
removing the moulded end cover secured with 3 captive screws.
To remove the contact breaker lever, slacken the nut securing the end of the contact
breaker spring which is slotted to permit easy withdrawal of the moving contact lever.
If dirty, oily or burnt, contact points must be cleaned with a fine carborundum stone or
very fine emery cloth and afterwards wiped with a cloth moistened with petrol.
Adjustment of contact breaker (Magneto type SR-1)
If and when adjustment is necessary slacken the two screws securing the fixed contact
plate and adjust the position of the plate until the gap, when the contacts are fully
opened, is set to the thickness of the gauge. The correct gap should be .010 to .012.
Special Notes (all models)
Check the contact breaker gap after the first 500 miles. Owing to the initial settling
down there is a tendency for the gap to alter in the first few hundred miles of use.
Subsequent adjustment will only be required at long intervals, but it is nevertheless
advisable to check every two thousand miles.
Lubrication
All magnetos are provided with ball bearings on the driving shaft. These bearings are
packed with grease upon assembly and require no attention for a considerable time.
About every two years or when the engine is undergoing a general overhaul the
magneto should be dismantled at a Lucas Service Depot and the bearings re-packed
with high melting point grease.
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