Crankcase emission control system

 

The engine is equipped with a closed crankcase system to prevent discharging crankcase emissions into the atmosphere. Blow-by gas is returned to the combustion chamber through the air cleaner housing and throttle body.

 

AIR CLEANER HOUSING

 

THROTTLE BODY

 

CRANKCASE

 

BREATHER HOSE

 

 

FRESH AIR

 

BLOW-BY GAS

 

1-27

GENERAL INFORMATION

EXHAUST EMISSION CONTROL SYSTEM

 

The exhaust emission control system is composed of a pulse secondary air supply system, three-way catalytic converter and PGM-FI system.

 

SECONDARY AIR SUPPLY SYSTEM

 

The pulse secondary air supply system introduces filtered air into the exhaust gases in the exhaust port. Fresh air is drawn into the exhaust port by the function of the PAIR control valve.

 

This charge of fresh air promotes burning of the unburned exhaust gases and changes a considerable amount of hydrocarbons and carbon monoxide into relatively harmless carbon dioxide and water vapor.

 

The reed valve prevents reverse air flow through the system. The PAIR control valve is operated by the solenoid valve. The solenoid valve is controlled by the PGM-FI unit, and the fresh air passage is opened/closed according to running condition (ECT/ IAT/TP/MAP sensor and engine revolution).

 

No adjustments to the secondary air supply system should be made, although periodic inspection of the components is recommended.

PAIR CONTROL SOLENOID VALVE	AIR CLEANER HOUSING

 

PAIR

 

CHECK

 

VALVE

 

THROTTLE BODY

 

 

EXHAUST PORT

 

FRESH AIR

 

EXHAUST GAS

 

THREE-WAY CATALYTIC CONVERTER

 

This motorcycle is equipped with a three-way catalytic converter.

 

The three-way catalytic converter is in the exhaust system. Through chemical reactions, it converts HC, CO and NOX in the engine’s exhaust to carbon dioxide (CO2), nitrogen (N2), and water vapor.

 

No adjustment to these systems should be made although periodic inspection of the components is recommended.

 

 

1-28

GENERAL INFORMATION

NOISE EMISSION CONTROL SYSTEM

 

TAMPERING WITH THE NOISE CONTROL SYSTEM IS PROHIBITED: Local law may prohibit the following acts or the causing there of: (1) The removal or rendering inoperative by any person, other than for purposes of maintenance, repair or replacement, of any device or element of design incorporated into any vehicle for the purpose of noise control prior to its sale or delivery to the ultimate customer or while it is in use; (2) the use of the vehicle after such device or element of design has been removed or rendered inoperative by any person.

 

AMONG THOSE ACTS PRESUMED TO CONSTITUTE TAMPERING ARE THE ACTS LISTED BELOW:

 

1. Removal of, or puncturing of the muffler, baffles, header pipes or any other component which conducts exhaust gases.

2. Removal of, or puncturing of any part of the intake system.

3. Lack of proper maintenance.

4. Replacing any moving parts of the vehicle, or parts of the exhaust or intake system, with parts other than those specified by the manufacturer.

 

 

1-29

MEMO

FRAME/BODY PANELS/EXHAUST SYSTEM

 

 

 

SERVICE INFORMATION·····························2-2

 

TROUBLESHOOTING···································2-2 SEAT······························································2-3 SIDE COVER·················································2-3 RESERVE TANK COVER ·····························2-4 FUEL TANK SHROUD ··································2-4 SKID PLATE··················································2-5 HEADLIGHT COWL ······································2-5 FRONT FENDER···········································2-5 FRAME GUARD ············································2-6

 

 

DRIVE SPROCKET COVER ·························2-6

 

DRIVE CHAIN COVER

 

(U TYPE ONLY) ············································2-6 TOOL BOX ····················································2-7 REAR FENDER·············································2-7 REAR UPPER FENDER ·······························2-8 TAIL COVER/LIGHT UNIT····························2-8 REAR LOWER FENDER ······························2-9 EXHAUST PIPE/MUFFLER ························2-11 SUB-FRAME ···············································2-12 SIDESTAND ················································2-14

 

 

2-1

FRAME/BODY PANELS/EXHAUST SYSTEM

SERVICE INFORMATION

 

GENERAL

 

• This section covers removal and installation of the body panels, sub-frame and exhaust system.

 

• Always replace the gaskets when removing the exhaust system.

• Always inspect the exhaust system for leaks after installation.

 

TROUBLESHOOTING

 

Excessive exhaust noise

• Broken exhaust system

• Exhaust gas leak

 

Poor performance

• Deformed exhaust system

• Exhaust gas leak

• Clogged muffler

 

2-2

FRAME/BODY PANELS/EXHAUST SYSTEM

SEAT

 

REMOVAL/INSTALLATION

 

Remove the hook bolts [1] and collars [2].
[3]		[1]/[2]
Remove the seat [3] by pulling it rearward and releasing
the hooks.
Installation is in the reverse order of removal.
TORQUE:
Hook bolt: 21 N·m (2.1 kgf·m, 15 lbf·ft)

 

SIDE COVER

 

REMOVAL/INSTALLATION

 

Right side: Remove the socket bolt [1] and collar [2]. Left side: Remove the socket bolt [1].

Release the boss [3] from the frame grommet, then remove the side cover [4] by pulling it rearward.

 

Installation is in the reverse order of removal.

 

• Align the cover grooves with the tabs of the fuel tank shroud.