AIR INDUCTION SYSTEM
7-23
EAS30488
CHECKING THE AIR INDUCTION SYSTEM
Air injection
The air induction system burns unburned ex-
haust gases by injecting fresh air (secondary air)
into the exhaust port, reducing the emission of
hydrocarbons. When there is negative pressure
at the exhaust port, the reed valve opens, allow-
ing secondary air to flow into the exhaust port.
The required temperature for burning the un-
burned 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 be-
ing driven. However, if the coolant temperature
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 seat
Cracks/damage
→
Replace the reed valve
assembly.
3. Measure:
• Reed valve bending limit “a”
Out of specification
→
Replace the reed
valve assembly.
A. From the air filter case
B. To the cylinder head
Reed valve bending limit
0.4 mm (0.02 in)
Содержание YZF-R1
Страница 1: ...2020 SERVICE MANUAL YZF R1 YZF R1M YZFR1L YZFR1LC YZFR1ML YZF1MLC LIT 11616 33 33 B3L 28197 10 ...
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Страница 38: ...SPECIAL TOOLS 1 29 ...
Страница 55: ...TIGHTENING TORQUES 2 16 ...
Страница 58: ...CABLE ROUTING 2 19 Frame front right side view A B C D E F G H I J K L M 1 1 1 2 3 5 5 4 4 4 6 5 7 8 9 ...
Страница 60: ...CABLE ROUTING 2 21 Frame rear right side view B A C D 2 1 2 3 4 5 6 7 ...
Страница 76: ...CABLE ROUTING 2 37 Rear fender left side view A B C D G 1 2 3 4 5 6 7 7 8 8 7 10 10 11 E 2 9 3 3 9 F 3 ...
Страница 82: ...CABLE ROUTING 2 43 Front brake hose left side view A 1 1 1 1 2 2 2 3 3 3 4 4 4 3 4 ...
Страница 84: ...CABLE ROUTING 2 45 Hydraulic unit assembly top and left side view A B C 1 2 3 3 4 4 5 6 7 7 8 8 9 10 10 11 11 ...
Страница 86: ...CABLE ROUTING 2 47 Fuel tank top and left side view A B 1 2 3 4 5 2 5 ...
Страница 88: ...CABLE ROUTING 2 49 Canister for California A E 1 2 3 4 5 6 B B B C D 7 8 9 10 E F G H E 7 10 11 ...
Страница 92: ...CABLE ROUTING 2 53 Air cut off valve right side view A B C C D E 1 2 2 3 3 3 4 4 5 5 5 6 7 ...
Страница 96: ...CABLE ROUTING 2 57 Radiator left side view A B C D E F G H I J G K L M N O 1 2 2 2 3 3 3 4 5 6 7 8 9 D ...
Страница 100: ...CABLE ROUTING 2 61 Muffler top and left side view 1 1 2 3 3 4 5 5 6 6 4 4 5 6 5 6 A ...
Страница 102: ...CABLE ROUTING 2 63 CCU top and right side view for YZF R1M A B C D E F G H 1 2 3 2 3 4 5 6 4 5 6 7 7 8 9 9 10 ...
Страница 104: ...CABLE ROUTING 2 65 ...
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Страница 144: ...PERIODIC MAINTENANCE 3 37 ...
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Страница 171: ...GENERAL CHASSIS 5 4 22 T R Front muffler protector bolt 7 N m 0 7 kgf m 5 2 lb ft b b a a 1 ...
Страница 222: ...REAR BRAKE 4 73 6 Adjust Rear brake light operation timing Refer to ADJUSTING THE REAR BRAKE LIGHT SWITCH on page 3 35 ...
Страница 280: ...CHAIN DRIVE 4 131 ...
Страница 336: ...ELECTRIC STARTER 5 53 1 2 3 a b ...
Страница 406: ...WATER PUMP 6 17 ...
Страница 432: ...AIR INDUCTION SYSTEM 7 25 ...
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Страница 441: ...IGNITION SYSTEM 8 6 ...
Страница 449: ...CHARGING SYSTEM 8 14 ...
Страница 453: ...LIGHTING SYSTEM 8 18 ...
Страница 488: ...ELECTRICAL COMPONENTS 8 53 ...
Страница 496: ...89_ABS 9 295 TROUBLESHOOTING 9 295 90_ABS 9 298 TROUBLESHOOTING 9 298 91_ABS 9 301 TROUBLESHOOTING 9 301 ...
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Страница 507: ...SYSTEM DIAGRAM 9 10 ...
Страница 525: ...STEERING DAMPER SYSTEM 9 28 ...
Страница 800: ...91_ABS 9 303 4 Defective hydraulic unit assembly Replace the hydraulic unit assembly ...
Страница 801: ...91_ABS 9 304 ...
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