KYMCO agility R16 150 Service Manual

18. EVAPORATIVE/EXHAUST EMISSION
CONTROL SYSTEM
18-1
EXHAUST EMISSION CONTROL SYSTEM
The exhaust emission control system adopted in this model utilizes the reed valve to draw
secondary air into the exhaust system for re-combustion by means of exhaust pulsation so as to
minimize the exhaust emission.
FUNCTION
Item
Purpose Function
Secondary Air
Cleaner
Filter secondary air.
It filters the fresh air drawn for re-burning to
p
revent dirt or dust from affectin
g
the o
p
eration of
the air injection cut-off valve.
Air Injection Cut-
off Valve
Prevent exhaust
muffler noise and
backfiring at sudden
deceleration.
The air injection cut-off valve usually opens to
lead air into the exhaust muffler in which air is re-
burned to reduce CO. When the throttle valve
closes suddenly, the air injection cut-off valve is
actuated b
y
vacuum to close and cut off secondar
y
air in order to prevent exhaust muffler backfiring
due to air in the exhaust system.
Reed Valve
Control the secondar
y
air inlet to reduce CO.
When the motorcycle speed is less than 50km per
hour, the reed valve o
p
erates to draw secondar
y
ai
r
into the exhaust system for re-combustion.
SERVICE INFORMATION
GENERAL INSTRUCTIONS
xDuring operation, be careful to avoid scalding caused by the exhaust muffler.
xNote the locations of tubes for proper installation.
xReplace any damaged tube with a new one.
xMake sure to tighten the connector of each tube securely
TOOLS SPECIFICATIONS
xVacuum pump－ Air injection cut-off valve actuating pressure－
250mm/Hg－30 liter/min.
Reed valve stopper clearance－6.6mm
TROUBLESHOOTING
High CO at idle speed Exhaust muffler noise
xDamaged or clogged reed valve xFaulty air injection cut-off valve
xDamaged or clogged air injection cut-off valve xBroken vacuum tube
xClogged air cleaner xFaulty reed valve
Backfiring at sudden deceleration
xDamaged reed valve (malfunction)
xFaulty air injection cut-off valve (unable to close)
xCarburetor incorrectly adjusted
xFaulty air cut-off valve
xLeaking vacuum tube
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Recambios KYMCO en www.batmotos.com

KYMCO agility R16 150 Specifications

General

Brand	KYMCO
Model	agility R16 150
Category	Scooter
Language	English