Yamaha TMAX XP500F 2015, Service Manual, Page: 265 / 478

VALVES AND VALVE SPRINGS
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EAS30286
CHECKING THE VALVE SPRINGS
The following procedure applies to all of the
valve springs.
1. Measure:
• Valve spring free length “a”
Out of specification
→
Replace the valve
spring.
2. Measure:
• Compressed valve spring force “a”
Out of specification
→
Replace the valve
spring.
3. Measure:
• Valve spring tilt “a”
Out of specification
→
Replace the valve
spring.
EAS30287
CHECKING THE VALVE LIFTERS
The following procedure applies to all of the
valve lifters.
1. Check:
• Valve lifter
Damage/scratches
→
Replace the valve lift-
ers and cylinder head.
Free length (intake)
36.73 mm (1.45 in)
Limit
34.89 mm (1.37 in)
Free length (exhaust)
36.73 mm (1.45 in)
Limit
34.89 mm (1.37 in)
Installed compression spring
force (intake)
96.60–111.20 N (9.85–11.34 kgf,
21.72–25.00 lbf)
Installed compression spring
force (exhaust)
96.60–111.20 N (9.85–11.34 kgf,
21.72–25.00 lbf)
Installed length (intake)
30.60 mm (1.20 in)
Installed length (exhaust)
30.60 mm (1.20 in)
b. Installed length
Spring tilt (intake)
1.6 mm (0.06 in)
Spring tilt (exhaust)
1.6 mm (0.06 in)