Kawasaki S2 (1972-1973) [20/129] Cylinder cylinder head
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Kawasaki S2 (1972-1973) [20/129] Cylinder cylinder head

Kawasaki S2 (1972-1973) [20/129] Cylinder cylinder head

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Take out three mounting bolts to remove air cleaner base plate from frame 1 Construction The cylinder itself is light made of alum alloy with a high cooling coefficient and inner surface is made wear resistant by casting it a surface hardened cast iron sleeve The sp fusion process by which the sleeve is bonde the aluminum averts the formation of any pockets which might reduce heat conduction decrease cooling efficiency In the inner surface of the cylinder exh scavenge and intake ports are provided and t are opened and closed by the sides of the p as it moves up and down inside the cylinder 3 Overhaul About every 2 000 miles the air cleaner element should be checked and cleaned with gasoline If the element is damaged replace it CAUTION The S and KH series element is a dry type oil or gasoline oil mixture should not be used to clean it 4 Assembly Assembly is the reverse of disassembly After assembly make sure all clamps are tight 2 CYLINDER CYLINDER HEAD The cylinder and cylinder head constitute the combustion chamber and arc exposed to extremely high temperatures while the engine is running To prevent piston seizure to prevent heat transformation of the shape or molecular structure of the cylinder cylinder head piston piston ring connecting rods etc and to prevent preignition due to overheating the cylinder and cylinder head are made of an aluminum alloy with good conductivity and fins are provided on the exterior to Further increase cooling efficiency If carbon formed by incomplete combustion accumulates heavily on the inner surface of the cylinder head not only does this hinder heat radiation but the carbon becomes red hot and causes overheating and preignition Compression in the combustion chamber has a direct relationship with engine output power if the cylinder head is tightened down with less than normal torque or if the head bolts arc not tightened evenly the head will warp and leaks will develop with a resultant lowering of compression Again cylinder piston And piston ring wear will cause a decrease in compression and consequently limit engine performance In the case of cylinder wear or piston seizure L_ Intake G3 Exhaust Scavenge Table 2 Port Timing Model SI KH250 S2 S3 K Open 0 74 BTDC 73 BTDC 73 B Close P 74 ATDC 73 ATDC 73 A Open Q 62 BBDC Scavenge Oose R 62 ABDC 5 8 BBDC 58 B OpcnS 83 BBDC 89 BBDC 86 B Intake Exhaust 58 ABDC 58 A

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