
ENGINE SPECIFICATIONS
2-2
EASB29B054
ENGINE SPECIFICATIONS
Engine
Combustion cycle
4-stroke
Cooling system
Liquid cooled
Valve train
DOHC
Displacement
250 cm
3
Number of cylinders
Single cylinder
Bore
stroke
77.0
53.6 mm (3.03
2.11 in)
Compression ratio
13.5 : 1
Starting system
Electric starter
Fuel
Recommended fuel
Premium unleaded gasoline (Gasohol [E10]
acceptable)
Fuel tank capacity
7.5 L (2.0 US gal, 1.7 Imp.gal)
Fuel reserve amount
2.1 L (0.55 US gal, 0.46 Imp.gal)
Engine oil
Recommended brand
YAMALUBE
SAE viscosity grades
10W-40, 10W-50, 15W-40, 20W-40 or 20W-50
Recommended engine oil grade
API service SG type or higher, JASO standard
MA
Lubrication system
Wet sump
Engine oil quantity
Oil change
0.83 L (0.88 US qt, 0.73 Imp.qt)
With oil filter removal
0.85 L (0.90 US qt, 0.75 Imp.qt)
Quantity (disassembled)
1.10 L (1.16 US qt, 0.97 Imp.qt)
Oil filter
Oil filter type
Paper
Oil pump
Inner-rotor-to-outer-rotor-tip clearance
0.000–0.150 mm (0.0000–0.0059 in)
Limit
0.23 mm (0.0091 in)
Outer-rotor-to-oil-pump-housing clearance
0.13–0.18 mm (0.0051–0.0071 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
Coolant quantity
Radiator (including all routes)
1.00 L (1.06 US qt, 0.88 Imp.qt)
Radiator cap valve opening pressure
107.9–137.3 kPa (1.08–1.37 kgf/cm
2
,
15.6–19.9 psi)
Water pump
Water pump type
Single suction centrifugal pump
Impeller shaft tilt limit
0.15 mm (0.006 in)
Spark plug(s)
Manufacturer/model
NGK/LMAR8G
Spark plug gap
0.7–0.8 mm (0.028–0.031 in)
Cylinder head
Warpage limit
0.05 mm (0.0020 in)
Camshaft
Содержание YZ 2018 Series
Страница 6: ...EASB916006 YAMAHA MOTOR CORPORATION U S A YZ MOTORCYCLE LIMITED WARRANTY...
Страница 10: ......
Страница 40: ...MOTORCYCLE CARE AND STORAGE 1 28...
Страница 51: ...ELECTRICAL SPECIFICATIONS 2 10 Fuse s Main fuse 15 0 A Spare fuse 15 0 A Radiator fan motor fuse 5 0 A...
Страница 64: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 23...
Страница 66: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 25...
Страница 67: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 26 1 Exhaust camshaft 2 Intake camshaft 3 Oil filter element 4 Oil pump...
Страница 68: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 27...
Страница 69: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 28 1 Camshaft 2 Oil pressure check bolt 3 Oil filter element 4 Oil pump...
Страница 70: ...CABLE ROUTING DIAGRAM 2 29 EASB29B065 CABLE ROUTING DIAGRAM...
Страница 72: ...CABLE ROUTING DIAGRAM 2 31...
Страница 74: ...CABLE ROUTING DIAGRAM 2 33...
Страница 76: ...CABLE ROUTING DIAGRAM 2 35...
Страница 78: ...CABLE ROUTING DIAGRAM 2 37...
Страница 80: ...CABLE ROUTING DIAGRAM 2 39...
Страница 82: ...CABLE ROUTING DIAGRAM 2 41...
Страница 84: ...CABLE ROUTING DIAGRAM 2 43...
Страница 235: ...ELECTRIC STARTER 5 38 5 Install Bolt 1 O ring 2 TIP Apply the lithium soap based grease on the O ring New...
Страница 255: ...OIL PUMP AND BALANCER GEAR 5 58 a 2 10 b 2 9 1 b 5 3 a 4 10 5 9 3 E c d 6 7 8 8 b 6...
Страница 276: ...TRANSMISSION 5 79...
Страница 290: ...FUEL TANK 7 5 A Left B Right 1 1 A 0 mm 0 in B 1 1 15 mm 0 59 in...
Страница 296: ...THROTTLE BODY 7 11...
Страница 299: ......
Страница 313: ...CHARGING SYSTEM 8 14...
Страница 321: ...COOLING SYSTEM For JPN 8 22...
Страница 351: ...FUEL PUMP SYSTEM 8 52 EASB29B345...
Страница 352: ...ELECTRICAL COMPONENTS 8 53 ELECTRICAL COMPONENTS EASB29B346 9 10 11 1 3 2 4 5 6 7 8...
Страница 354: ...ELECTRICAL COMPONENTS 8 55 11 10 9 2 3 1 6 7 8 4 5...
Страница 356: ...ELECTRICAL COMPONENTS 8 57 EASB29B347 CHECKING THE SWITCHES 4 1 3 2 B B Sb B B B B B B B B...
Страница 357: ...ELECTRICAL COMPONENTS 8 58 1 Engine stop switch 2 Neutral switch 3 Clutch switch 4 Start switch...
Страница 372: ...ELECTRICAL COMPONENTS 8 73 c Measure the fuel injector resistance...