General information

The fuel system consists of the fuel tank, fuel tap, filter, carburettors, fuel hoses and control cables.

The fuel filter is part of the tap and is fitted inside the fuel tank.

The carburettors used on all models are CV types with one carburettor for each cylinder. For cold starting, a choke lever is mounted on the left-hand handlebar, and is connected to the carburettors by a cable. To prevent carburettor icing, coolant is routed via a small-bore hose from the union on the back of the cylinder head to the carburettor bodies and then back to the cooling system via a union on the water pump cover.

Air is drawn into the carburettors through an air filter which is housed under the carburettors.

The exhaust system is a two-into-one design.

Many of the fuel system service procedures are considered routine maintenance items and for that reason are included in Chapter 1.

Precautions

Warning: Petrol (gasoline) is extremely flammable, so take extra precautions when you work

on any part of the fuel system. Don't smoke or allow open flames or bare light bulbs near the work area, and don't work in a garage where a natural gas-type appliance is present. If you spill any fuel on your skin, rinse it off immediately with soap and water. When you perform any kind of work on the fuel system, wear safety glasses and have a fire extinguisher suitable for a class B type fire (flammable liquids) on hand.

Always perform service procedures in a well-ventilated area to prevent a build-up of fumes.

Never work in a building containing a gas appliance with a pilot light, or any other form of naked flame. Ensure that there are no naked light bulbs or any sources of flame or sparks nearby.

Do not smoke (or allow anyone else to smoke) while in the vicinity of petrol (gasoline) or of components containing it. Remember the possible presence of vapour from these sources and move well clear before smoking.

Check all electrical equipment belonging to the house, garage or workshop where work is being undertaken (see the Safety first! section of this manual). Remember that certain electrical appliances such as drills, cutters etc. create sparks in the normal course of operation and must not be used near petrol (gasoline) or any component containing it. Again, remember the possible presence of fumes before using electrical equipment.

Always mop up any spilt fuel and safely dispose of the rag used.

Any stored fuel that is drained off during servicing work must be kept in sealed containers that are suitable for holding petrol (gasoline), and clearly marked as such; the containers themselves should be kept in a safe place. Note that this last point applies equally to the fuel tank if it is removed from the machine; also remember to keep its filler cap closed at all times.

Read the Safety first! section of this manual carefully before starting work.

2 Fueltank and fueltap -

removal and installation

Warning: Refer to the precautions given in Section 1 before starting work.

Fuel tank

Removal

1Make sure the fuel filler cap is secure and fuel tap is in the OFF position. Remove the seat and the frame side panels; on R, T, V, W, X and Y models remove the radiator side panels and on SW, SX and SY models detach the lower edge of the fairing from the fuel tank (see Chapter 8) (see illustration).

2Place a rag under the fuel tap to catch any residual fuel as the hose is detached. Release the clip securing the fuel hose to the tap and detach the hose (see illustration). Note:Hit is necessary to drain the tank , connect a length of fuel hose to the tap and place the free end of the hose in a suitable container below the level of the fuel in the tank. Turn the tap to the RES position and draw vacuum in the vacuum hose; fuel should flow from the tank. Clamp the vacuum hose until sufficient fuel has been drawn from the tank, then turn the tap OFF and disconnect the fuel hose.

3 Release the clip securing the vacuum hose to the left-hand inlet manifold and detach the hose (see illustration).

4Unscrew the bolt securing the rear of the tank to the frame and lift the tank to gain access to the clips securing the drain hose and breather hose under the right-hand side of the tank. Release the clips and detach the hoses (see illustrations).

Date: 2016-01-14; view: 495