Engine; Adjusting The Valve Clearance - Yamaha XV16AL Service Manual

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ADJUSTING THE VALVE CLEARANCE

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EAS00047

ENGINE

ADJUSTING THE VALVE CLEARANCE
The following procedure applies to all of
the valves.
NOTE:
• The valve clearance is automatically
adjusted by the hydraulic valve lifter.
However, there are times that the valve
clearance is needed to be adjusted manu-
ally. If this is the case, adjust the clearance
of the two maladjusted or worn valves, of
a rocker arm, with the adjusting screw.
Å If clearance is on the slip side 1, loosen the
adjusting screw and bring the valve clearance
a within specification. Check if the valve
clearance b on the adjusting screw 2 side is
within specification.
ı If clearance is on the adjusting screw 2 side,
tighten the adjusting screw and bring the
valve clearance b within specification.
• Valve clearance adjustment should be
made on a cold engine, at room tempera-
ture.
• When the valve clearance is to be mea-
sured or adjusted, the piston must be at
top dead center (TDC) on the compression
stroke.
1. Remove:
• rider seat
Refer to "SEATS AND SIDE COVERS".
• fuel tank
Refer to "FUEL TANK".
2. Disconnect:
• spark plug caps 1
• cylinder head breather hose 2
• oil tank breather hose 3
3. Remove:
• spark plugs
• cylinder head covers (upper)
• gaskets
• dowel pins
CHK
ADJ
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