CO check
The test must be done after a thorough cleaning
of all parts of the carburettor, with the air filter clean
and spark plug in good condition.
1) Heat the vehicle for the time necessary to acti-
vate the catalytic converter.
2) Turn off the vehicle for the time necessary to
perform the operations of 3) and 4).
3) Insert an extension pipe of ~ 50 cm at the ex-
haust fumes socket on the silencer.
4) With the utmost care, check the seal between
silencer and tube. Insert the probe of the exhaust
fumes analyser into the tube.
5) Start the engine.
6) Wait for a minute for the minimum to stabilise.
7) Without ever operating the accelerator and us-
ing the appropriate screw (1), bring the engine
speed to 1350 ± 100g/min.
8) Record the flow screw (2) in order to have a
value of «CO» at a minimum of 2.0 ± 1.0.
9) Operate the throttle grip by slowly speeding up
the engine to a speed of 4000 rpm. and return to
the closed position; check that the idle speed re-
mains at the previously established value, other-
wise repeat the procedure starting from point 3).
Specific tooling
020332Y Digital rev counter
494929 Exhaust fumes analyzer
MSS APE 50 Emission Controlo System
CO EM - 39
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