Yamaha V Star 950 Service Manual page 92

Thickness gauge
90890-03180
Feeler gauge set
YU-26900-9
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Rear cylinder
a. Turn the crankshaft counterclockwise from
the front cylinder piston TDC by 300
degrees.
b. When the rear cylinder piston is at TDC on
the compression stroke, align the TDC
mark "c" on the generator rotor with the slot
"d" in the generator cover.
TIP
• When the piston is at TDC on the compres-
sion stroke, there should be clearance
between the valve stem tips and their respec-
tive rocker arm adjusting screws.
• If there is no clearance, rotate the crankshaft
counterclockwise one turn.
c. Measure the valve clearance with a thick-
ness gauge.
Thickness gauge
90890-03180
Feeler gauge set
YU-26900-9
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8. Adjust:
• Valve clearance
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a. Loosen the locknuts "1".
PERIODIC MAINTENANCE
b. Insert a thickness gauge "2" between the
end of the adjusting screw "3" and the valve
tip.
Thickness gauge
90890-03180
Feeler gauge set
YU-26900-9
c. Turn the adjusting screw in direction "a" or
"b" with the hexagon wrench "4" until the
specified valve clearance is obtained.
Direction "a"
Valve clearance is increased.
Direction "b"
Valve clearance is decreased.
d. Hold the adjusting screw to prevent it from
moving and tighten the locknut to specifica-
tion.
Locknut (rocker arm adjusting
screw)
27 Nm (2.7 m·kgf, 19 ft·lbf)
e. Measure the valve clearance again.
f. If the valve clearance is still out of specifi-
cation, repeat all of the valve clearance
adjustment steps until the specified clear-
ance is obtained.
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