Yamaha 2007 XP500 User Manual

VALVES AND VALVE SPRINGS
5-22
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.
EAS24320
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.
EAS24340
INSTALLING THE VALVES
The following procedure applies to all of the
valves and related components.
1. Deburr:
● Valve stem end
(with an oil stone)
2. Lubricate:
● Valve stem “1”
● Valve stem seal “2”
(with the recommended lubricant)
Valve spring free length
Free length (intake)
35.59 mm (1.40 in)
Limit
33.81 mm (1.33 in)
Free length (exhaust)
35.59 mm (1.40 in)
Limit
33.81 mm (1.33 in)
1. Installed length
Intake
91.2–104.9 N (9.3–10.7 kg,
20.5–23.6 lb) at 30.4 mm (1.2 in)
Exhaust
91.2–104.9 N (9.3–10.7 kg,
20.5–23.6 lb) at 30.4 mm (1.2 in)
Spring tilt limit
Spring tilt (intake)
2.5 °/1.6 mm
Spring tilt (exhaust)
2.5 °/1.6 mm
Recommended lubricant
Molybdenum disulfide oil

Yamaha 2007 XP500 Specifications

General

Displacement	499 cc
Compression Ratio	11.0:1
Fuel System	Fuel Injection
Ignition	TCI
Front Suspension	Telescopic fork
Rear Suspension	Swingarm
Front Tire	120/70-15
Rear Tire	160/60-15
Seat Height	800mm
Wheelbase	1, 580 mm
Length	2, 230mm
Width	775 mm
Engine Type	Liquid-cooled, 4-stroke
Transmission	Automatic
Front Brake	Dual disc
Rear Brake	Single disc
Fuel Tank Capacity	15 liters