AIR INDUCTION SYSTEM
7-25
EAS27060
CHECKING THE AIR INDUCTION SYSTEM
Air injection
The air induction system burns unburned
exhaust gases by injecting fresh air (second-
ary air) into the exhaust port, reducing the
emission of hydrocarbons. When there is neg-
ative pressure at the exhaust port, the reed
valve opens, allowing secondary air to flow into
the exhaust port. The required temperature for
burning the unburned exhaust gases is
approximately 600 to 700
°
C (1112 to 1292
°
F).
Air cut-off valve
The air cut-off valve is controlled by the signals
from the ECU in accordance with the combus-
tion conditions. Ordinarily, the air cut-off valve
opens to allow the air to flow during idle and
closes to cut-off the flow when the vehicle is
being driven. However, if the coolant tempera-
ture is below the specified value, the air cut-off
valve remains open and allows the air to flow
into the exhaust pipe until the temperature
becomes higher than the specified value.
1. Check:
• Hoses
Loose connections
→
Connect properly.
Cracks/damage
→
Replace.
2. Check:
• Reed valve
• Reed valve stopper
• Reed valve base
Cracks/damage
→
Replace the reed
valve assembly.
3. Measure:
• Reed valve bending limit “a”
Out of specification
→
Replace the reed
valve.
A. From the air filter case
B. To the cylinder head
Reed valve bending limit
0.4 mm (0.016 in)
Summary of Contents for YZF-R1 2012
Page 1: ...SERVICE MANUAL YZF R1 B 2012 1KB 28197 E0 ...
Page 6: ......
Page 8: ......
Page 70: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 29 EAS20410 LUBRICATION DIAGRAMS ...
Page 72: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 31 ...
Page 74: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 33 ...
Page 76: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 35 ...
Page 77: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 36 1 Main axle 2 Oil water pump assembly ...
Page 78: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 37 ...
Page 79: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 38 1 Main axle 2 Oil delivery pipe 2 3 Drive axle ...
Page 80: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 39 ...
Page 82: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 41 ...
Page 84: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 43 ...
Page 85: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 44 1 Balancer shaft 2 Crankshaft ...
Page 86: ...COOLING SYSTEM DIAGRAMS 2 45 EAS20420 COOLING SYSTEM DIAGRAMS ...
Page 88: ...COOLING SYSTEM DIAGRAMS 2 47 ...
Page 89: ...COOLING SYSTEM DIAGRAMS 2 48 1 Radiator cap 2 Radiator 3 Radiator fan 4 Oil cooler ...
Page 90: ...CABLE ROUTING 2 49 EAS20430 CABLE ROUTING ...
Page 92: ...CABLE ROUTING 2 51 ...
Page 94: ...CABLE ROUTING 2 53 ...
Page 96: ...CABLE ROUTING 2 55 ...
Page 98: ...CABLE ROUTING 2 57 ...
Page 100: ...CABLE ROUTING 2 59 ...
Page 102: ...CABLE ROUTING 2 61 ...
Page 104: ...CABLE ROUTING 2 63 ...
Page 106: ...CABLE ROUTING 2 65 ...
Page 108: ...CABLE ROUTING 2 67 ...
Page 110: ...CABLE ROUTING 2 69 ...
Page 112: ...CABLE ROUTING 2 71 ...
Page 114: ...CABLE ROUTING 2 73 ...
Page 116: ...CABLE ROUTING 2 75 ...
Page 119: ......
Page 156: ...PERIODIC MAINTENANCE 3 37 ...
Page 248: ...CHAIN DRIVE 4 89 ...
Page 263: ...ENGINE REMOVAL 5 12 Installed depth of gasket c 3 5 mm 0 14 in ...
Page 295: ...PICKUP ROTOR 5 44 Yamaha bond No 1215 Three Bond No 1215 90890 85505 ...
Page 350: ...TRANSMISSION 5 99 ...
Page 366: ...WATER PUMP 6 15 ...
Page 388: ...AIR INDUCTION SYSTEM 7 21 EAS27040 AIR INDUCTION SYSTEM ...
Page 394: ...AIR INDUCTION SYSTEM 7 27 ...
Page 397: ......
Page 398: ...IGNITION SYSTEM 8 1 EAS27090 IGNITION SYSTEM EAS27110 CIRCUIT DIAGRAM ...
Page 404: ...ELECTRIC STARTING SYSTEM 8 7 EAS27160 ELECTRIC STARTING SYSTEM EAS27170 CIRCUIT DIAGRAM ...
Page 410: ...CHARGING SYSTEM 8 13 EAS27200 CHARGING SYSTEM EAS27210 CIRCUIT DIAGRAM ...
Page 413: ...CHARGING SYSTEM 8 16 ...
Page 414: ...LIGHTING SYSTEM 8 17 EAS27240 LIGHTING SYSTEM EAS27250 CIRCUIT DIAGRAM ...
Page 418: ...SIGNALING SYSTEM 8 21 EAS27270 SIGNALING SYSTEM EAS27280 CIRCUIT DIAGRAM ...
Page 425: ...SIGNALING SYSTEM 8 28 ...
Page 426: ...COOLING SYSTEM 8 29 EAS27300 COOLING SYSTEM EAS27310 CIRCUIT DIAGRAM ...
Page 429: ...COOLING SYSTEM 8 32 ...
Page 430: ...FUEL INJECTION SYSTEM 8 33 EAS27330 FUEL INJECTION SYSTEM EAS27340 CIRCUIT DIAGRAM ...
Page 503: ...FUEL INJECTION SYSTEM 8 106 ...
Page 504: ...FUEL PUMP SYSTEM 8 107 EAS27550 FUEL PUMP SYSTEM EAS27560 CIRCUIT DIAGRAM ...
Page 508: ...IMMOBILIZER SYSTEM 8 111 EAS27640 IMMOBILIZER SYSTEM EAS27650 CIRCUIT DIAGRAM ...
Page 517: ...IMMOBILIZER SYSTEM 8 120 ...
Page 518: ...ELECTRICAL COMPONENTS 8 121 EAS27972 ELECTRICAL COMPONENTS ...
Page 520: ...ELECTRICAL COMPONENTS 8 123 ...
Page 522: ...ELECTRICAL COMPONENTS 8 125 EAS27980 CHECKING THE SWITCHES ...
Page 546: ...ELECTRICAL COMPONENTS 8 149 ...
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