Yamaha WR450FX, Owner'S Service Manual

Page: 34 / 220

2-9
MAINTENANCE SPECIFICATIONS
CHASSIS
Lubrication system:
Oil filter type Paper type ----
Oil pump type Trochoid type ----
Tip clearance 0.12 mm or less (0.0047 in or less) 0.20 mm (0.008
in)
Side clearance 0.09–0.17 mm (0.0035–0.0067 in) 0.24 mm (0.009
in)
Housing and rotor clearance 0.03–0.10 mm (0.0012–0.0039 in) 0.17 mm
(0.0067 in)
Bypass valve setting pressure 40–80 kPa (0.4–0.8 kg/cm
2
, 5.69–11.38
psi)
----
Cooling:
Radiator core size
Width 120.2 mm (4.73 in) ----
Height (Left/Right) 260 mm (10.24 in)/240 mm (9.45 in) ----
Thickness 22 mm (0.87 in) ----
Radiator cap opening pressure 110 kPa (1.1 kg/cm
2
, 15.6 psi) ----
Radiator capacity (total) 0.57 L (0.50 Imp qt, 0.60 US qt) ----
Water pump
Type Single-suction centrifugal pump ----
Item Standard Limit
Item Standard Limit
Steering system:
Steering bearing type Taper roller bearing ----
Front suspension: CDN AUS, NZ, ZA
Front fork travel 300 mm (11.8 in)
←
----
Fork spring free length 460 mm (18.1 in)
←
455 mm (17.9
in)
Spring rate, STD K = 4.5 N/mm (0.459 kg/
mm, 25.7 lb/in)
←
----
Optional spring/spacer Yes
←
----
Oil capacity 648 cm
3
(22.8 lmp oz,
21.9 US oz)
655 cm
3
(23.1 lmp oz,
22.1 US oz)
----
Oil level 132 mm (5.20 in) 125 mm (4.92 in) ----
<Min.–Max.> (From top of outer tube with inner
tube and damper rod fully compressed without
spring.) 95–150 mm (3.74–5.91
in)
←
----
Oil grade Suspension oil "S1"
←
----
Inner tube outer diameter 48 mm (1.89 in)
←
----
Front fork top end Zero mm (Zero in)
←
----
Rear suspension:
Shock absorber travel 130 mm (5.12 in) ----
Spring free length 260 mm (10.24 in) ----
Fitting length 252.5 mm (9.94 in) ----
<Min.–Max.> 238.5–258.5 mm (9.39–10.18 in) ----
Spring rate, STD K = 54.0 N/mm (5.50 kg/mm, 308.0 lb/in) ----
Optional spring Yes ----
Enclosed gas pressure 1,000 kPa (10 kg/cm
2
, 142 psi) ----
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