ENGINE SPECIFICATIONS
2-3
Valve dimensions
Valve seat contact width limit (intake)
1.5 mm (0.06 in)
Valve seat contact width limit (exhaust)
1.5 mm (0.06 in)
Valve stem diameter limit (intake)
5.445 mm (0.2144 in)
Valve stem diameter limit (exhaust)
5.435 mm (0.2140 in)
Valve guide inside diameter (intake)
5.500–5.512 mm (0.2165–0.2170 in)
Valve guide inside diameter (exhaust)
5.500–5.512 mm (0.2165–0.2170 in)
Valve-stem-to-valve-guide clearance limit
(intake)
0.080 mm (0.0032 in)
Valve-stem-to-valve-guide clearance limit
(exhaust)
0.100 mm (0.0039 in)
Valve stem runout
0.010 mm (0.0004 in)
Valve spring
Free length limit (intake)
36.65 mm (1.44 in)
Free length limit (exhaust)
35.55 mm (1.40 in)
Cylinder
Bore
97.000–97.010 mm (3.8189–3.8193 in)
Wear limit
97.060 mm (3.8213 in)
Piston
Piston-to-cylinder clearance
0.010–0.045 mm (0.0004–0.0018 in)
Diameter
96.955–96.970 mm (3.8171–3.8177 in)
Measuring point (from piston skirt bottom)
9.0 mm (0.35 in)
Piston pin bore inside diameter limit
18.045 mm (0.7104 in)
Piston pin outside diameter limit
17.981 mm (0.7079 in)
Piston-pin-to-piston-pin-bore clearance
0.004–0.024 mm (0.0002–0.0009 in)
Piston ring
Top ring
End gap limit
0.55 mm (0.0217 in)
Ring side clearance
0.015–0.065 mm (0.0006–0.0026 in)
Side clearance limit
0.120 mm (0.0047 in)
2nd ring
End gap limit
0.85 mm (0.0335 in)
Ring side clearance
0.020–0.060 mm (0.0008–0.0024 in)
Side clearance limit
0.100 mm (0.0039 in)
Crankshaft
Crank assembly width
61.93–62.00 mm (2.438–2.441 in)
Runout limit
0.030 mm (0.0012 in)
Clutch
Clutch type
Wet, multiple-disc
Clutch lever free play
7.0–12.0 mm (0.28–0.47 in)
Friction plate 1 thickness
2.92–3.08 mm (0.115–0.121 in)
Wear limit
2.82 mm (0.111 in)
Plate quantity
5 pcs
Friction plate 2 thickness
2.92–3.08 mm (0.115–0.121 in)
Wear limit
2.82 mm (0.111 in)
Plate quantity
3 pcs
Clutch plate thickness
1.50–1.70 mm (0.059–0.067 in)
Plate quantity
7 pcs
Warpage limit
0.10 mm (0.004 in)
Clutch spring free length
48.00 mm (1.89 in)
Содержание YZ450F 2021
Страница 6: ...EAM20162 YAMAHA MOTOR CORPORATION U S A YZ MOTORCYCLE LIMITED WARRANTY ...
Страница 10: ......
Страница 44: ...MOTORCYCLE CARE AND STORAGE 1 32 ...
Страница 61: ...TIGHTENING TORQUES 2 16 ...
Страница 62: ...CABLE ROUTING DIAGRAM 2 17 EAM20152 CABLE ROUTING DIAGRAM Frame and engine left side view ...
Страница 64: ...CABLE ROUTING DIAGRAM 2 19 Frame and engine right side view ...
Страница 66: ...CABLE ROUTING DIAGRAM 2 21 Handlebar front view ...
Страница 68: ...CABLE ROUTING DIAGRAM 2 23 Frame and engine top view ...
Страница 70: ...CABLE ROUTING DIAGRAM 2 25 Frame and battery top view ...
Страница 72: ...CABLE ROUTING DIAGRAM 2 27 Rear brake right side view ...
Страница 74: ...CABLE ROUTING DIAGRAM 2 29 ...
Страница 112: ...ELECTRICAL SYSTEM 3 36 ...
Страница 148: ...REAR BRAKE 4 34 system Refer to BLEEDING THE HYDRAULIC BRAKE SYSTEM on page 3 25 ...
Страница 188: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 5 2 EAM30507 LUBRICATION DIAGRAMS 1 Camshaft 2 Drive axle 3 Main axle ...
Страница 189: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 5 3 1 Connecting rod 2 Oil nozzle 3 Crankshaft ...
Страница 190: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 5 4 1 Exhaust camshaft 2 Intake camshaft 3 Oil filter element 4 Oil pump ...
Страница 191: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 5 5 1 Oil filter element 2 Oil pump 3 Oil strainer ...
Страница 206: ...CAMSHAFT 5 20 6 Install Cylinder head breather hose Spark plug Spark plug 13 N m 1 3 kgf m 9 6 lb ft T R ...
Страница 262: ...TRANSMISSION 5 76 ...
Страница 272: ...WATER PUMP 6 9 ...
Страница 282: ...THROTTLE BODY 7 9 ...
Страница 289: ...IGNITION SYSTEM 8 6 ...
Страница 290: ...ELECTRIC STARTING SYSTEM 8 7 EAM20143 ELECTRIC STARTING SYSTEM EAM30279 CIRCUIT DIAGRAM ...
Страница 294: ...CHARGING SYSTEM 8 11 EAM20144 CHARGING SYSTEM EAM30282 CIRCUIT DIAGRAM ...
Страница 297: ...CHARGING SYSTEM 8 14 ...
Страница 298: ...FUEL INJECTION SYSTEM 8 15 EAM20145 FUEL INJECTION SYSTEM EAM30284 CIRCUIT DIAGRAM ...
Страница 321: ...FUEL INJECTION SYSTEM 8 38 ...
Страница 322: ...FUEL PUMP SYSTEM 8 39 EAM20146 FUEL PUMP SYSTEM EAM30287 CIRCUIT DIAGRAM ...
Страница 352: ...SELF DIAGNOSTIC FUNCTION AND DIAGNOSTIC CODE TABLE 9 15 ...
Страница 362: ...CHASSIS 10 9 ...
Страница 364: ......
Страница 366: ......
Страница 368: ...YZ450FM 2021 WIRING DIAGRAM B2W 2819U 11_W D indd 2 2020 02 05 10 21 39 ...