BSA Winged Wheel W1 Instruction Manual page 28

lifting the lid, noting carefully that a specml joint
washer E is interposed between the silencer and
the lid. Take carc- not to damage this. as it is liable»
to affect the exhaust note adversely it replaced in an
unsound Condition.
The internal bame F can now be taken out and
this, together with the inner walls of the silencer,
should be carefully cleaned of any carbon Which
has formed, after which the silencer can be re-
assembled.
An absnrption type cylindei of improved design
is fitted to later models.
The snund absorption pack (C), Fig. 11A, "1'"
eventually become choked. and simuld be replaced
by a. new one at intervals of aoout 5 00!) miles. To
replace this pack, remove silencer as described on
page 26. then take ofi nut A, Fig. 11A; this allows
the rear end of the silencer body (D) to be separated
from the front end (3)., when the old absorption
material can be pulled out.
Fig, 11A.
Clean the pcrfomtcd tube of any carbon or oil.
fit the new pack (obtainable from your "'inged
""heol dealer) and reassemble. Remove any carbon
deposit which may have collected in the small
flanged inlet pipe before refitting silencer;
27