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YAMAHA POWER VALVE SYSTEM (Y.P.V.S.)
1
2
1
2
1
SERVOMOTOR
SDN8420
1. Remove:
2. Disconnect the Y.P.V.S. check coupler cap 1
SDN8430
3. Inspect:
SDN8440
3
Inspection steps:
•
4
Y.P.V.S. (+) test lead 3 → Battery (+) terminal
Y.P.V.S. (–) test lead 4 → Battery (–) terminal
Do not operate the engine.
•
4. Connect:
8-25
•
Cover 1
from the Y.P.V.S. check coupler 2.
•
Servomotor
Connect the Y.P.V.S. adjustment coupler 1 to
the Y.P.V.S. check coupler 2 and apply bat-
tery voltage (12 V) to the Y.P.V.S. adjustment
coupler lead.
Y.P.V.S. adjustment coupler:
YS-43092
WARNING
If servomotor does not move, replace it.
•
Y.P.V.S. check coupler
–
+
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