Fuel injection system
DL650 motorcycles are equipped with a fuel injection system for emission level control.
This fuel injection system is precision designed, manufactured and adjusted to comply with the applicable emission limits.
![](https://motoinstruction.ru/img/suzuki/14/121040.jpg)
1. Fuel filter (For high pressure); 2. Fuel pressure regulator; 3. Fuel injector; 4. Fuel feed hose; 5. Fuel mesh filter (For low pressure); 6. Fuel pump; A. Before-pressurized fuel; B. Pressurized fuel; C. Relieved fuel
Crankcase emission control system
The engine is equipped with a PCV system. Blow-by gas in the engine is constantly drawn into the crankcase, which is returned to the combustion chamber through the breather hose, air cleaner and throttle body.
![](https://motoinstruction.ru/img/suzuki/14/121041.jpg)
1. PAIR reed valve; 2. Breather hose; 3. Air cleaner box; 4. PAIR control solenoid valve; A. FRESH AIR; B. FUEL/AIR MIXTURE; C. BLOW-BY GAS
Exhaust emission control system (PAIR system)
The exhaust emission control system is composed of the PAIR system and THREE-WAY CATALYST system. (Except for E-03, -24 and-28) The fresh air is drawn into the exhaust port with the PAIR solenoid valve and PAIR reed valve. The PAIR solenoid valve is operated by the ECM, and the fresh air flow is controlled according to the TPS, ECTS, IATS and IAPS.
![](https://motoinstruction.ru/img/suzuki/14/121042.jpg)
1. ECM; 2. Air cleaner box; 3. PAIR control solenoid valve; 4. PAIR reed valve; 5. Injector; 6. PAIR reed valve; A. FRESH AIR; B. EXHAUST GAS
Noise emission control system
Tampering with the noise control system prohibited: Federal law prohibits the following acts or the causing thereof:
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 new vehicle for the purpose of noise control prior to its sale or delivery to the ultimate purchaser or while it is in use, or
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:
- Removing or puncturing the muffler, baffles, header pipes, screen type spark arrester (if equipped) or any other component which conducts exhaust gases.
- Removing or puncturing the air cleaner case, air cleaner cover, baffles or any other component which conducts intake air.
- Replacing the exhaust system or muffler with a system or muffler not marked with the same model specific code as the code listed on the Motorcycle Noise Emission Control Information label.
Evaporative emission control system (Only for E-33)
![](https://motoinstruction.ru/img/suzuki/14/121043.jpg)
1. IAP sensor; 2. Vacuum damper; 3. Vacuum hose; 4. No.2 Throttle body; 5. No.1 Throttle body; 6. Purge hose; 7. Surge hose; 8. Fuel shut-off valve; 9. EVAP canister; A. HC VAPOR; B. FRESH AIR; C. VACUUM