Yamaha FX10X 2008, Service Manual

Page: 24 / 411

2-7
INSP
ADJ
VALVE CLEARANCE ADJUSTMENT
VALVE CLEARANCE ADJUSTMENT
NOTE:
• Valve clearance adjustment should be made on a
cold engine, at room temperature.
• When the valve clearance is to be measured or
adjusted, the piston must be at the top dead cen-
ter (TDC) on the compression stroke.
1. Drain:
• Engine oil
Refer to “ENGINE OIL REPLACEMENT”.
2. Remove:
• Fuel tank
Refer to “SEAT AND FUEL TANK” in CHAP-
TER 5.
• Oil tank
Refer to “OIL TANK” in CHAPTER 5.
3. Remove:
• Cylinder head cover
Refer to “CAMSHAFTS” in CHAPTER 5.
• Timing mark accessing screw
1
• Crankshaft end accessing screw 2
4. Measure:
• Valve clearance
Out of specification
→
Adjust.
Checking steps:
• Turn the crankshaft clockwise.
• When piston #3 is at TDC on the compression
stroke, align the TDC mark
a
on the AC mag-
neto rotor with the mark
b
on the AC magneto
cover.
NOTE:
TDC on the compression stroke can be found when
the camshaft lobes are turned away from each
other.
Valve clearance (cold):
Intake valve:
0.15 ~ 0.22 mm
(0.0059 ~ 0.0087 in)
Exhaust valve:
0.21 ~ 0.25 mm
(0.0083 ~ 0.0098 in)
2
1
b
a
EX IN