AJS 350 1954, Maintenance Manual And Instruction Book, Page: 31 / 96

REMOVING CARBON DEPOSIT
Do not use a sharp implement for removing carbon deposit from the interior of the
cylinder head and the piston crown. A blunt piece of soft brass will be found quite
suitable and the use of such will obviate the risk of making deep scratches.
Care it
necessary to avoid damaging the valve seatings and in no circumstances should any
abrasive material, such as emery, or emery cloth, be used for cleaning and polishing.
Illustration 9
Showing flywheel in exploded form
VALVE GRINDING
Before commencing valve grinding, carefully examine the face of each valve and, if
found to be deeply pitted, have them refaced. (Most garages have suitable equipment
for that purpose.) Any attempt to remove deep pit marks by grinding will inevitably
cause undue and undesirable widening of the seats.
As a rule, inlet valves require very little attention and one light application of fine grinding
paste should be sufficient to restore an even matt finish to both valve face and seat.
The exhaust valves may require two, or even three, applications but, as already mentioned,
excessive grinding is both unnecessary and harmful.
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