Honda CB125 CB160 (1972) [24/139] Refer to fig 3 33

Содержание

Похожие устройства

18 3 ENGINE E Description of valve The valve performs the important role of air tightness in the cylinder of intake and exhaust for compression and combustion and extensively influences the engine output At the exhaust valve the camber is small for ob taining better heat radiation and the clearance between the stem and cylinder is made large At the inlet valve it is large for increasing the intake efficiency and the clearance between the stem and the cylinder is made small for satisfying various conditions con Fig 3 33 Valve cerning valve A double spring system is employed for the valve Refer to Fig 3 33 I Disassembly 1 Remove the cylinder head according to Section 3 2 1 2 Depress the valve lifter spring and remove the two valve cotter pins with long nose pliers or tweezers the retainer valve spring from the head cover and the valve from the combustion chamber Refer to Fig 3 34 Fig 3 34 Removing valve II Installation 1 Before the valve is assembled the valve contact surface should be inspected for wear pitting or carbon After cleaning oil the valve stem and the valve should be inserted from the combutioni chamber side Refer to Fig 3 35 2 The valve spring outer and inner retainers should be fitted from the cap hole of the tappet adjusting hole and be compressed by using the valve lifter Secure with the valve cotter pin Fig 3 35 Oiling the valve stem III Valve seating 1 Dressing of a valve seat is made by using three cutters such as a 90 plane cutter INTAKE and EXHAUST plane cutter and INTAKE and EXHAUST interior surface cutter 2 The position of a seat is determined by the INTAKE and EXHAUST plane cutter and the width of a contact surface is determined by using an INTAKE and EXHAUST interior surface cutter 3 When a seat surface is excessively burned dresssing should be performed by using a 90 cutter so that Fig 3 36 Dressing valve seat the Fig 3 36 seat surface becomes even Refer to

Скачать