Yamaha Power Valve System (Y.p.v.s.) Adjustment - Yamaha SXV70ERG Supplementary Service Manual

YAMAHA POWER VALVE SYSTEM (Y.P.V.S.) ADJUSTMENT

YAMAHA POWER VALVE SYSTEM (Y.P.V.S.)
ADJUSTMENT
WARNING
When adjusting the valve clearance, do not
operate the engine.
1. Adjust:
S Y.P.V.S.
Adjustment steps:
SXV70
S Remove the front panel (right).
S Remove the Y.P.V.S. check coupler cap 1 .
S Connect the Y.P.V.S. adjustment coupler 2 to
the Y.P.V.S. check coupler 3 .
S Connect the Y.P.V.S. adjustment coupler leads
as follows.
S Turn the main switch to "ON".
Y.P.V.S. (+) adjustment coupler lead 4 !
Battery (+) terminal 5
Y.P.V.S. (–) adjustment coupler lead 6 !
Battery (–) terminal 7
Y.P.V.S. adjustment coupler:
YS-43092–1
NOTE:
S When battery power is applied, the Y.P.V.S.
valve should fully open.
S If the valve does not fully open, check the Ser-
vo motor. Refer to "YAMAHA POWER VALVE
SYSTEM (Y.P.V.S.)".
WARNING
Failure to use the proper Y.P.V.S. adjustment
coupler may result in internal damage to the
CDI unit.
SXV70ER
S Turn the main switch to "ON".
S Slide back the adjuster covers 8 .
S Loosen the locknuts 9 .
S Turn the adjusting nuts
specified clearance is obtained.
–14–
INSP
ADJ
in or out until the
10