FUEL SYSTEM (DFI) 3-87

Throttle Grip and Cables

Throttle• Grip Play Inspection/Adjustment

Refer to the Throttle Control System Inspection in the Periodic Maintenance chapter.

Choke Lever Operation

○Do not use the choke lever except when the engine has a starting difficulty like in cold weather (10°C, 50°F or below) or at high altitude. The DFI system has an automatic choke system, using a water temperature sensor, and an atmospheric pressure sensor, which provide startability.

NOTE

○Pull [A] the choke lever fully when using. The choke doesn’t work with the lever knob halfway.

○When flooded, do not crank the engine with the throttle fully opened like a carburetor. This promotes engine flooding because more fuel is supplied automatically by the DFI system.

Choke• Lever Play Inspection

Push the choke lever [A] fully and ensure by your finger that the choke cam [B] has the specified play.

Choke Lever Free Play

Standard: 0 0.5 mm (0 0.02 in.)

•Pull [C] the choke lever fully and ensure that the choke cam turns the choke link [D].

If the free play is incorrect, adjust the choke cable.

Choke• Lever Play Adjustment

•Remove the fuel tank (see Fuel Tank Removal).

Loosen the locknut [A], and turn the adjuster [B] until the

•cable has the proper amount of free play. Tighten the locknut against the adjuster securely.

Cable• Removal/Installation

Refer to the Throttle Assy section in this chapter for removal/installation of the throttle cables and choke cable.

Cable• Lubrication and Inspection

Refer to the General Lubrication in the Periodic Maintenance chapter.

3-88 FUEL SYSTEM (DFI)

Throttle Body Assy

Idle• Speed Inspection

Refer to the Idle Speed Inspection in the Periodic Maintenance chapter.

Engine Vacuum Synchronization Inspection/

Adjustment•

Refer to the Engine Vacuum Synchronization Inspection

in the Periodic Maintenance chapter.

High• Altitude Performance Adjustment

Any modification is not necessary in this model since the atmospheric pressure sensor senses atmospheric pressure change due to high altitude and the ECU compensates the change.

Throttle Body Assy Removal

WARNING

Gasoline is extremely flammable and can be explosive under certain conditions. Turn the ignition switch OFF. Disconnect the battery (–) cable terminal. Do not smoke. Make sure the area is well-ventilated and free from any source of flame or sparks; this includes any appliance with a pilot light.

Be prepared for fuel spillage: any spilled fuel must be completely wiped up immediately.

•Remove:

Fuel Tank (see Fuel Tank Removal)

Vacuum Switch Valve Vacuum Hose [A] (from air cleaner housing [B])

Front [C]

•Remove the vacuum hoses from the positions [A] shown. Front [B]

FUEL SYSTEM (DFI) 3-89

Throttle Body Assy

•Loosen:Throttle Assy Holder Clamp Bolts [A]

Air Cleaner Duct Clamp Bolts [B]

•Remove:

Right and Left Side Covers (see Frame chapter) Coolant Reserve Tank (see Cooling System in the Periodic Maintenance chapter)

Crankcase Breather Hose

Right and Left Air Cleaner Housing Mounting Bolts [A]

•Move [A] the air cleaner housing backwards.

•Pull [B] the throttle body assy out of the holders [C].

•Slide [A] the throttle body assy [B] right and remove it.

•Loosen the locknut and screw in the throttle cable adjuster

•fully to give the cables plenty of play.

Remove the right handlebar switch housing and take out the accelerator cable upper end [A] and the decelerator cable upper end [B].