Yamaha XMAX 125, Service Manual

Page: 33 / 498

ENGINE SPECIFICATIONS (YP125R)
2-2
EAS37P1118
ENGINE SPECIFICATIONS (YP125R)
Engine
Engine type Liquid cooled 4-stroke, SOHC
Displacement 124 cm³
Cylinder arrangement Forward-inclined single cylinder
Bore
×
stroke 52.0
×
58.6 mm (2.05
×
2.31 in)
Compression ratio 11.20 :1
Standard compression pressure (at sea level) 550 kPa/680 r/min (5.5 kgf/cm²/680 r/min, 78.2
psi/680 r/min)
Minimum–maximum 480–620 kPa (4.8–6.2 kgf/cm², 68.3–88.2 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 SG type or higher, JASO standard
MA
Engine oil quantity
Total amount 1.60 L (1.69 US qt, 1.41 Imp.qt)
Without oil filter element replacement 1.40 L (1.48 US qt, 1.23 Imp.qt)
With oil filter element replacement 1.50 L (1.59 US qt, 1.32 Imp.qt)
Final transmission oil
Type SAE 10W-30 type SE motor oil
Quantity 0.21 L (0.22 US qt, 0.18 Imp.qt)
Quantity (disassembled) 0.23 L (0.24 US qt, 0.20 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 0.013–0.018 mm (0.0005–0.0007 in)
Limit 0.25 mm (0.0098 in)
Oil-pump-housing-to-inner-and-outer-rotor
clearance 0.06–0.11 mm (0.0024–0.0043 in)
Limit 0.18 mm (0.0071 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)