73
7.14
SAS (Secondary Air System)
7.14.1
General
The Secondary Air System (SAS) on the 200cc
L.E.AD.E.R. engines is similar, in principle, to the
SAS employed on PIAGGIO’s 2-stroke engines.
Here, however, the secondary air enters directly
into the exhaust duct from the head.
The bleed valve found on the 2-stroke engine is here replaced by a membrane. The unit,
indicated by an arrow in the figure, is provided with a cut-off connected to the vacuum inlet
on the intake manifold to shut the air inlet during deceleration, to prevent explosions in the
silencer.
7.14.2
Description
Air is sucked through hole
«A»
and flows through
the first filter into hole
«B»
.
Passing through the hole indicated in the figure,
air reaches the second filter
«B»
.
At this point, the filtered air enters into the
membrane device to be channeled towards the
head.
Summary of Contents for GT 200
Page 1: ......
Page 90: ...90 9 1 2 Turn Signal Lights Horn Services and Accessory Pre Wiring ...
Page 151: ...151 10 10 Lubrication Circuit ...