Yamaha RX10K Supplementary Service Manual page 295

VALVE AND VALVE SPRINGS
12. Measure:
S Compressed spring force a
Out of specification ! Replace the valve
spring.
b Installed length
13. Measure:
S Valve spring tilt a
Out of specification ! Replace the valve
spring.
14. Inspect:
S Valve lifter
Damage/scratches ! Replace the valve lift-
ers and cylinder head.
5-28
ENG
Compressed spring force:
Intake
82 X 96 N at 34.5 mm
(8.2 X 9.6 kg at 34.5 mm,
18.1 X 21.2 lb at 1.36 in)
Exhaust
110 X 126 N at 35.0 mm
(11.0 X 12.6 kg at 35.0 mm,
24.3 X 27.8 lb at 1.38 in)
Spring tilt:
Intake
2.5_/1.7 mm (0.067 in)
Exhaust
2.5_/1.8 mm (0.071 in)