Yamaha MTN1000 2016 Service Manual page 138

• Air scoop/Air scoop stay
Refer to "GENERAL CHASSIS (1)" on page
4-1.
• Fuel tank cover
Refer to "GENERAL CHASSIS (2)" on page
4-13.
• Fuel tank
Refer to "FUEL TANK" on page 7-1.
• Air filter case
Refer to "GENERAL CHASSIS (3)" on page
4-20.
• Air cut-off valve
Refer to "AIR INDUCTION SYSTEM" on
page 7-15.
• Radiator
Refer to "RADIATOR" on page 6-1.
2. Remove:
• Ignition coils
• Spark plugs
• Cylinder head cover
• Cylinder head cover gasket
Refer to "CAMSHAFTS" on page 5-9.
3. Remove:
• Timing mark accessing bolt "1"
• Crankshaft end cover "2"
2
4. Measure:
• Valve clearance
Out of specification  Adjust.
Valve clearance (cold)
Intake
0.09–0.17 mm (0.0035–0.0067 in)
Exhaust
0.20–0.26 mm (0.0079–0.0102 in)
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a. Turn the crankshaft counterclockwise.
b. When piston #1 is at TDC on the compres-
sion stroke, align the TDC mark "a" on the
generator rotor with the generator rotor cover
slot "b".
PERIODIC MAINTENANCE
TIP
TDC on the compression stroke can be found
when the camshaft lobes are turned away from
each other.
c. Measure the valve clearance #1 with a thick-
ness gauge "1".
TIP
Measure the valve clearance between the cam
lobe and rocker arm "c".
1
TIP
• If the valve clearance is incorrect, record the
measured reading.
• Measure the valve clearance in the following
sequence.
3-6
Thickness gauge
90890-03180
Feeler gauge set
YU-26900-9
1
a b
c