Engine Specifications - Yamaha YZF-R125 Service Manual

YamahaR125.COM
EAS20290

ENGINE SPECIFICATIONS

Engine
Engine type
Displacement
Cylinder arrangement
Bore × stroke
Compression ratio
Standard compression pressure (at sea level)
Minimum–maximum
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
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
Limit
Relief valve operating pressure
Pressure check location
Cooling system
Radiator capacity (including all routes)
Coolant reservoir capacity (up to the maximum level
mark)
Radiator cap opening pressure
ENGINE SPECIFICATIONS
Liquid cooled 4-stroke, SOHC
124.7 cm³
Forward-inclined single cylinder
52.0 × 58.6 mm (2.05 × 2.31 in)
11.20 :1
550 kPa/600 r/min (78.2 psi/600 r/min) (5.5
kgf/cm²/600 r/min)
480–620 kPa (68.3–88.2 psi) (4.8–6.2 kgf/cm²)
Electric starter
Premium unleaded gasoline only
13.8 L (3.65 US gal) (3.04 Imp.gal)
1.6 L (0.42 US gal) (0.35 Imp.gal)
Wet sump
SAE 10W-30, SAE 10W-40, SAE 15W-40, SAE
20W-40 or SAE 20W-50
API service SG type or higher, JASO standard
MA
1.15 L (1.22 US qt) (1.01 Imp.qt)
0.95 L (1.00 US qt) (0.84 Imp.qt)
1.00 L (1.06 US qt) (0.88 Imp.qt)
Paper
Trochoid
Less than 0.15 mm (0.0059 in)
0.23 mm (0.0091 in)
0.13–0.18 mm (0.0051–0.0071 in)
0.25 mm (0.0098 in)
0.06–0.11 mm (0.0024–0.0043 in)
0.18 mm (0.0071 in)
39.2–78.4 kPa (5.7–11.4 psi) (0.39–0.78
kgf/cm²)
Check bolt on cylinder head body
1.00 L (1.06 US qt) (0.88 Imp.qt)
0.25 L (0.26 US qt) (0.22 Imp.qt)
107.9 – 137.3 kPa (15.6–19.9 psi) (1.08–1.37
kgf/cm²)
2-2