Clean Air System

Vacuum Switch Valve Removal

• Remove:

Fuel Tank (see Fuel Tank Removal in the Fuel System chapter)

• Remove the clamps [A] and take off the vacuum switch
valve [B].

Vacuum Switch Valve Installation • Install the vacuum switch valve so that the air hole [A] faces downwards.

Air Suction Valve Removal

• Remove the vacuum switch valve (see Vacuum Switch Valve Removal).

• Remove the bolts [A] and remove the air suction valve covers [B].

Air Suction Valve Installation

• Replace the gasket with a new one.

• Install the air suction valve [A] so that its wider side [B] of the reed faces the rear [C].

Torque-Air Suction Valve Cover Bolts: 11 N-m(1.1 kgf-m, 95 in-lb)

Air Suction Valve Inspection

• Refer to the Engine Top End in the Periodic Maintenance
chapter.

Clean Air System Hose Inspection

• Be certain that all the hoses are routed without being flat­tened or kinked, and are connected correctly to the air cleaner housing, silencer, vacuum switch valve, carbure­tors, and air suction valve covers.

• If they are not, correct them. Replace them if they are damaged.