ENGINE SPECIFICATIONS (YP250R)
2-48
EAS20290
ENGINE SPECIFICATIONS (YP250R)
Engine
Engine type Liquid cooled 4-stroke, SOHC
Displacement 249 cm³
Cylinder arrangement Forward-inclined single cylinder
Bore × stroke 69.0 × 66.8 mm (2.72 × 2.63 in)
Compression ratio 10.00 :1
Standard compression pressure (at sea level) 1400 kPa/500 r/min (14.0 kgf/cm²/500 r/min,
199.1 psi/500 r/min)
Minimum–maximum 1120–1570 kPa (11.2–15.7 kgf/cm², 159.3–
223.3 psi)
Starting system Electric starter
Fuel
Recommended fuel Regular unleaded gasoline only
Fuel tank capacity 11.8 L (3.12 US gal, 2.60 Imp.gal)
Fuel reserve amount 1.7 L (0.45 US gal, 0.37 Imp.gal)
Engine oil
Lubrication system Wet sump
Type SAE 10W-30, SAE 10W-40, SAE 15W-40, SAE
20W-40 or SAE 20W-50
Recommended engine oil grade API service SF, SG type or higher, JASO
standard MA
Engine oil quantity
Total amount 1.50 L (1.59 US qt, 1.32 Imp.qt)
Periodic oil change 1.30 L (1.37 US qt, 1.14 Imp.qt)
Final transmission oil
Type SAE 10W-30 type SE motor oil
Quantity 0.25 L (0.26 US qt, 0.22 Imp.qt)
Oil filter
Oil filter type Paper
Oil pump
Oil pump type Trochoid
Inner-rotor-to-outer-rotor-tip clearance Less than 0.15 mm (0.0059 in)
Limit 0.23 mm (0.0091 in)
Outer-rotor-to-oil-pump-housing clearance 0.013–0.036 mm (0.0005–0.0014 in)
Limit 0.106 mm (0.0042 in)
Oil-pump-housing-to-inner-and-outer-rotor
clearance 0.04–0.09 mm (0.0016–0.0035 in)
Limit 0.16 mm (0.0063 in)
Cooling system
Radiator capacity (including all routes) 1.00 L (1.06 US qt, 0.88 Imp.qt)
Coolant reservoir capacity (up to the maximum level
mark) 0.25 L (0.26 US qt, 0.22 Imp.qt)
Radiator cap opening pressure 100.0–120.0 kPa (1.00–1.20 kgf/cm², 14.5–17.4
psi)
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