Installing The Camshaft - Yamaha MBK X-MAX 300 2017 Service Manual

1
2. Check:
• Rocker arm shaft
Blue discoloration/excessive wear/pitting/
scratches → Replace or check the lubrication
system.
3. Measure:
• Rocker arm inside diameter "a"
Out of specification → Replace.
Rocker arm inside diameter
11.985–12.000 mm (0.4719–
0.4724 in)
Limit
12.015 mm (0.4730 in)
a
4. Measure:
• Rocker arm shaft outside diameter "a"
Out of specification → Replace.
Rocker arm shaft outside diame-
ter
11.966–11.976 mm (0.4711–
0.4715 in)
Limit
11.935 mm (0.4699 in)
1
5. Calculate:
• Rocker-arm-to-rocker-arm-shaft clearance
TIP
Calculate the clearance by subtracting the rock-
er arm shaft outside diameter from the rocker
arm inside diameter.
Out of specification → Replace the defective
part(s).
EAS30269

INSTALLING THE CAMSHAFT

1. Lubricate:
• Camshaft assembly
2. Lubricate:
• Rocker arms
• Rocker arm shafts
3. Install:
• Rocker arm shaft retainer "1"
5-24
CAMSHAFT
Rocker-arm-to-rocker-arm-shaft
clearance
0.009–0.034 mm (0.0004–0.0013
in)
Limit
0.080 mm (0.0032 in)
Recommended lubricant
Camshaft
Molybdenum disulfide oil
Camshaft bearing
Engine oil
Recommended lubricant
Rocker arm shaft
Rocker arm roller
Molybdenum disulfide oil
Rocker arm shaft retainer bolt
12 N·m (1.2 kgf·m, 8.9 lb·ft)
LOCTITE®