Engine Specifications - Yamaha YZ450FX 2019 Owner's Service Manual

EAM20128

ENGINE SPECIFICATIONS

Engine
Combustion cycle
Cooling system
Valve train
Displacement
Number of cylinders
Bore  stroke
Compression ratio
Starting system
Fuel
Recommended fuel
Fuel tank capacity
Fuel reserve amount
Engine oil
Recommended brand
SAE viscosity grades
Recommended engine oil grade
Lubrication system
Engine oil quantity
Oil change
With oil filter removal
Quantity (disassembled)
Oil filter
Oil filter type
Oil pump
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
Cooling system
Coolant quantity
Radiator (including all routes)
Radiator cap valve opening pressure
Spark plug(s)
Manufacturer/model
Spark plug gap
Cylinder head
Warpage limit
Camshaft
Camshaft cap inside diameter
ENGINE SPECIFICATIONS
4-stroke
Liquid cooled
DOHC
450 cm³
Single cylinder
97.0  60.9 mm (3.82  2.40 in)
12.8 : 1
Electric starter
Premium unleaded gasoline (Gasohol [E10] ac-
ceptable)
8.2 L (2.2 US gal, 1.8 Imp.gal)
2.0 L (0.53 US gal, 0.44 Imp.gal)
YAMALUBE
SAE 10W-40, SAE 10W-50, SAE 15W-40, SAE
20W-40 or SAE 20W-50
API service SG type or higher, JASO standard
MA
Wet sump
0.62 L (0.66 US qt, 0.55 Imp.qt)
0.64 L (0.68 US qt, 0.56 Imp.qt)
0.90 L (0.95 US qt, 0.79 Imp.qt)
Paper
0.000–0.150 mm (0.0000–0.0059 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)
1.03 L (1.09 US qt, 0.91 Imp.qt)
107.9–137.3 kPa (1.08–1.37 kgf/cm², 15.6–19.9
psi)
NGK/CPR8EA-9
0.8–0.9 mm (0.031–0.035 in)
0.05 mm (0.0020 in)
22.000–22.021 mm (0.8661–0.8670 in)
2-2