Sas Filters Inspection And Cleaning - PIAGGIO MSS Fly 50 4T Workshop Manual

Maintenance
9) Adjust the flow screw so to obtain a "CO" read-
ing of 3.2 % ± 0.5 %.
10) Slowly twist the throttle handgrip, bringing the
engine up to a speed of 4,000 rpm and then re-
lease it; check the idle speed is the same as be-
fore, otherwise repeat the operations starting from
point (3).
Specific tooling
020332Y Digital rev counter
494929Y Exhaust fumes analyser
020331Y Digital multimeter

SAS filters inspection and cleaning

After taking out the plug spark cover, unscrew the
three screws «A» and remove the right fairing. Un-
screw the three screws «B» and remove the hous-
ing cover of the secondary air system. Detach the
housing cover and remove the filtering element
«C» made of sponge. Wash the sponge with water
and neutral soap, then dry with a clean cloth and
short blasts of compressed air. While cleaning the
filter, check the condition of the reed valve «D»,
and mount it back in place on the housing.
Before closing the cover of the SAS housing,
check the good condition of the sealing O-ring; re-
place it if damaged or deformed.
N.B.
The reed valve can be inserted in only one direction on the
SAS housing
MAIN - 38
MSS Fly 50 4T