Engine Specifications - Yamaha WR250R Service Manual

EAS20290

ENGINE SPECIFICATIONS

Engine
Engine type
Displacement
Cylinder arrangement
Bore × stroke
Compression ratio
Starting system
Fuel
Recommended fuel
Fuel tank capacity
Fuel reserve amount
Engine oil
Lubrication system
Type
Recommended engine oil grade
Engine oil quantity
Total amount
Without oil filter element replacement
With oil filter element replacement
Oil filter type
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 0.030-0.100 mm (0.0012-0.0039 in)
Limit
Bypass valve opening pressure
Cooling system
Radiator capacity (including all routes)
Radiator capacity
Coolant reservoir capacity (up to the maximum level mark) 0.25 L (0.26 US qt) (0.22 Imp.qt)
Radiator cap opening pressure
Radiator core
Width
Height
Depth
ENGINE SPECIFICATIONS
Liquid cooled 4-stroke, DOHC
3
250.0 cm
Forward-inclined single cylinder
77.0 × 53.6 mm (3.03 × 2.11 in)
11.80 :1
Electric starter
Premium unleaded gasoline only
WR250R 7.2 L (1.90 US gal) (1.58 Imp.gal)
(CAL)
WR250R 7.6 L (2.01 US gal) (1.67 Imp.gal)
(U49)
WR250X 7.2 L (1.90 US gal) (1.58 Imp.gal)
(CAL)
WR250X 7.6 L (2.01 US gal) (1.67 Imp.gal)
(U49)
2.1 L (0.55 US gal) (0.46 Imp.gal)
Wet sump
YAMALUBE 4, SAE 10W-30 or SAE 20W-40
API service SG type or higher, JASO standard
MA
1.50 L (1.59 US qt) (1.32 Imp.qt)
1.30 L (1.37 US qt) (1.14 Imp.qt)
1.40 L (1.48 US qt) (1.23 Imp.qt)
Paper
Trochoid
Less than 0.120 mm (0.0047 in)
0.20 mm (0.0079 in)
0.090–0.160 mm (0.0035–0.0063 in)
0.230 mm (0.0091 in)
0.17 mm (0.0067 in)
500.0–600.0 kPa (72.5–87.0 psi) (5.00–6.00
2
kgf/cm )
0.90 L (0.95 US qt) (0.79 Imp.qt)
0.32 L (0.34 US qt) (0.28 Imp.qt)
108.0–137.4 kPa (15.7–19.9 psi) (1.08–1.37
2
kgf/cm )
121.4 mm (4.78 in)
246.0 mm (9.69 in)
28.0 mm (1.10 in)
2-2