Engine Specifications - Yamaha WR450F Owner's Service Manual

ENGINE SPECIFICATIONS

EAS2GC1062
Engine
Engine type
Displacement
Number of cylinders
Bore  stroke
Compression ratio
Starting system
Fuel
Recommended fuel
Fuel tank capacity
Fuel reserve amount
Engine oil
Lubrication system
Recommended brand
Type
Recommended engine oil grade
Engine oil quantity
Quantity (disassembled)
Oil change
With oil filter removal
Oil filter
Oil filter type
Bypass valve opening pressure
Oil pump
Oil pump type
Inner-rotor-to-outer-rotor-tip clearance
Limit
Outer-rotor-to-oil-pump-housing clearance
Limit
Oil-pump-housing-to-inner-and-outer-rotor
clearance
Limit
Cooling system
Radiator (including all routes)
Radiator capacity
Radiator cap valve opening pressure
Radiator core
Width
Height
Depth
Water pump
Water pump type
Spark plug(s)
Manufacturer/model
Spark plug gap
ENGINE SPECIFICATIONS
Liquid cooled 4-stroke, DOHC
3
449 cm
Single cylinder
97.0  60.8 mm (3.82  2.39 in)
12.5:1
Electric starter and kickstarter
Premium unleaded gasoline only
7.5 L (2.0 US gal, 1.7 Imp.gal)
2.0 L (0.5 US gal, 0.4 Imp.gal)
Wet sump
YAMALUBE
SAE 10W-40, SAE 10W-50, SAE 15W-40,
SAE 20W-40 or SAE 20W-50
API service SG type or higher, JASO standard
MA
0.95 L (1.00 US qt, 0.84 Imp.qt)
0.67 L (0.71 US qt, 0.59 Imp.qt)
0.69 L (0.73 US qt, 0.61 Imp.qt)
Paper
40.0–80.0 kPa (0.40–0.80 kgf/cm
5.8–11.6 psi)
Trochoid
0.000–0.150 mm (0.0000–0.0059 in)
0.20 mm (0.0079 in)
0.13–0.18 mm (0.0051–0.0071 in)
0.24 mm (0.0094 in)
0.06–0.11 mm (0.0024–0.0043 in)
0.17 mm (0.0067 in)
1.03 L (1.09 US qt, 0.91 Imp.qt)
0.57 L (0.60 US qt, 0.50 Imp.qt)
107.9–137.3 kPa (1.08–1.37 kg/cm
15.6–19.9 psi)
112.6 mm (4.43 in)
235.0 mm (9.25 in)
28.0 mm (1.10 in)
Single suction centrifugal pump
NGK/CR8E
0.7–0.8 mm (0.028–0.031 in)
2-2
2
,
2
,