Engine Specifications - Yamaha YJ125S Service Manual

ENGINE SPECIFICATIONS

Engine
Engine type
Displacement
Cylinder arrangement
Bore × stroke
Compression ratio
Engine idle speed
Vacuum pressure at engine idle speed
Standard compression pressure (at sea level)
Fuel
Recommended fuel
Fuel tank capacity
Total (including reserve)
Engine oil
Lubrication system
Recommended oil
-20˚ -10˚ 0˚ 10˚ 20˚ 30˚
SAE 10W-30
SAE 10W-40
SAE 20W-40
SAE 20W-50
Quantity
Periodic oil change
With oil filter replacement
Total amount
Final gear oil
Recommended oil
Periodic oil change
Total amount
ENGINE SPECIFICATIONS
Item
40˚ 50˚
Standard
Forced Air cooled 4-stroke,
SOHC
3
0.125L(125.0 cm
Forward inclined single cylinder ...
51.5 × 60.0 mm
9.8±0.4 :1
1600~1700 r/min
30.0 kpa(238.6 mmHg)
950 kPa(9.5kg/cm
Regular unleaded gasoline
4.5L (0.98lmp gal, 1.18 USgal) ...
Wet sump
SAE20W40SE
Yamaha 4-cycle oil
EFERO X, Z, BX
1.0L(0.92 lmp qt, 1.09 US qt)
1.2L(1.10 lmp qt, 1.31 US qt)
1.2L(1.10 lmp qt, 1.31 US qt)
SAE85W140S Ehypoid gear oil ...
0.13L(0.12 lmp qt, 0.14 US qt) ...
0.15L(0.14 lmp qt, 0.16 US qt) ...
2-2
SPEC
Limit
...
) ...
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2 ) / 300 r/min ...
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