Yamaha YZFR7P User Manual

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ENG
VALVES AND VALVE SPRINGS
2. Measure:
• compressed spring force a
Out of specification → Replace the
valve spring.
b Installed length
3. Measure:
• valve spring tilt a
Out of specification → Replace the
valve spring.
Compressed spring force
(installed)
Inner spring
Intake valve spring
10.30 ~ 11.93 kg at
27.96 mm
(22.7 ~ 26.3 lb at 1.10 in)
Exhaust valve spring
10.81 ~ 12.44 kg at
24.6 mm
(23.8 ~ 27.4 lb at 0.97 in)
Outer spring
Intake valve spring
23.45 ~ 27.12 kg at
32.03 mm
(51.7 ~ 59.8 lb at 1.26 in)
Exhaust valve spring
29.16 ~ 33.55 kg at
30.25 mm
(62.3 ~ 74.0 lb at 1.19 in)
Maximum spring tilt
Inner spring
Intake valve spring
1.4 mm (0.055 in)
Exhaust valve spring
1.3 mm (0.051 in)
Outer spring
Intake valve spring
1.6 mm (0.063 in)
Exhaust valve spring
1.5 mm (0.059 in)
EB403430
CHECKING THE VALVE LIFTERS
The following procedure applies to all of
the valve lifters.
1. Check:
• valve lifter
Damage/scratches → Replace the
valve lifters and cylinder head.

Yamaha YZFR7P Specifications

General

Brand	Yamaha
Model	YZFR7P
Category	Motorcycle
Language	English