Yamaha XSR900 2022, Service Manual

Page: 92 / 726

3 -6
PERIODIC MAINTENANCE
1. Remove:
• Rider seat
• Side cover
Refer to “GENERAL CHASSIS (1)” on
page 4-1.
• Fuel tank cover
Refer to “GENERAL CHASSIS (4)” on
page 4-10.
• Fuel tank
Refer to “FUEL TANK” on page 7-1.
• Air filter case
Refer to “GENERAL CHASSIS (5)” on
page 4-11.
• Radiator cover
• Front side panel
Refer to “GENERAL CHASSIS (3)” on
page 4-8.
• Radiator
Refer to “RADIATOR” on page 6-3.
2. Remove:
• Ignition coil
• Spark plug
• Cylinder head cover
• Cylinder head cover gasket
Refer to “CAMSHAFTS” on page 5-16.
3. Remove:
• Timing mark accessing bolt “1”
• Crankshaft end cover “2”
4. Measure:
• Valve clearance
Out of specification
→
Adjust.
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 cov-
er mark “b”.
TIP
TDC on the compression stroke can be found
when the camshaft lobes are turned away from
each other.
c. Measure the valve clearance with a thick-
ness gauge.
TIP
• If the valve clearance is incorrect, record the
measured reading.
• Measure the valve clearance in the following
sequence.
d. To measure the valve clearances of the
other cylinders, starting with cylinder #1 at
TDC, turn the crankshaft counterclockwise
as specified in the following table.
Valve clearance (cold)
Intake
0.11–0.20 mm (0.004 3 –0.0079
in)
Exhaust
0.28–0. 3 2 mm (0.0110–0.0126
in)
1
2
Thickness gauge
90890-0 3 268
Feeler gauge set
YU-26900-9
Valve clearance measuring sequence
Cylinder #1
→
#2
→
# 3
A. Front
a
b
G088882