Starting Enrichment Thermal Valve - Honda Motorcycle Service Manual

FUEL SYSTEM
STARING ENRICHMENT THERMAL VALVE
Connect an ohmmeter t o the starting enrichment thermal
valve wire connector terminals and measure the resistance. If
the resistance is greatly out of specification, it indicates a
faulty PTC in the starting enrichment thermal valve.
Replace the starting enrichment thermal valve.
NOTE
The starting enrichment thermal valve might be normal if
the resistance is only slightly out of specification.
However, be sure to check all related parts for trouble.
Refer to the Model Specific manual for specified
resistance.
Remove the carburetor and let
it
cool down for 30 minutes.
Insert a vinyl tube into the fuel enrichening circuit and blow in-
to the tube.
Air should flow into the circuit.
If air does not flow into the circuit, replace the starting
enrichment thermal valve.
STARTING ENRICHMENT
THERMAL VALVE
Connect the battery to the starting enrichment thermal valve
terminals and wait for
5
minutes.
Insert a vinyl tube into the fuel enrichening circuit and blow
into the tube.
Air should not flow into the circuit.
If air flows into the circuit, replace the starting enrichment
thermal valve.
Check the resistor if the starting enrichment thermal valve is
normal but engine is sill hard to start.
If there is a broken wire in the resistor,current will not flow to
the PTC and the starting enrichment thermal valve will not
operate,
If there is a shorted wire in the resistor, current of a higher
voltage than specified will reach the PTC. This will cause the
fuel enrichening circuit to close too soon, and starting will be
difficult.
ALTERNATOR
%A
Date of Issue: March, 1995
8-1 0
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HONDA MOTOR CO..LTD.