Service manual

2-2
SPEC
ENGINE SPECIFICATIONS
Item
Standard Limit
ENGINE SPECIFICATIONS
-20˚ -10˚ 0˚ 10˚ 20˚ 30˚ 40˚ 50˚
SAE 10W-30
SAE 10W-40
SAE 20W-40
SAE 20W-50
Engine
Engine type Liquid-cooled, 4-stroke, SOHC …
Displacement 0.049L(49cm
3
)…
Cylinder arrangement Forward inclined single cylinder …
Bore × stroke 38.0 × 43.5 mm …
Compression ratio 12:1 …
Engine idle speed 2000~2400 r/min …
Vacuum pressure at engine idle speed(AI OFF) 34.7 kpa ( 260 mmHg ) …
Standard compression pressure (at sea level) 1450 kPa (14.5kgf/cm
2
)…
at 700 r/min
Fuel
Recommended fuel Unleaded gasoline …
Fuel tank capacity
Total (including reserve) 4.5L ( 0.98 Imp gal, …
1.18 US gal )
Engine oil
Lubrication system Wet sump …
Recommended oil
SAE10W40 …
Yamaha 4-cycle oil
EFERO X,Z,BX
Quantity
Periodic oil change 0.73~0.83 L (0.67~0.76 Imp qt, …
0.80~0.90 US qt)
Total amount 0.8~0.9L (0.74~0.83 Imp qt, …
0.87~0.98 US qt)
Final gear oil
Recommended oil SAE10W30 hypoid gear oil …
Periodic oil change 0.09~0.11L (0.08~0.10 Imp qt, …
0.10~0.12 US qt)
Total amount 0.11~0.13L (0.10~0.12 Imp qt, …
0.12~0.14 US qt)