Kawasaki S2 (1972-1973) [80/129] Caliper assembly

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When oil pressure is developed inside caliper A s cylinder the piston is pushed and exerts pressure against the brake pad which in turn presses against the brake disc The pressurized oil is prevented from leaking by a rubber seal fitted into the cylinder wall The seal presses against the pistion and instead of sliding when the piston moves the seal only bends allowing no oil leakage at all When the brake lever is released and oil pressure lowers the elasticity of the seal returns the piston to its original position After the brakes are used for awhile and the padswear slightly the rubber seal will no longer be able to bend the additional amount that the piston travels Instead when piston travel forces the seal past its limit he seal slips slightly on the piston and then returns the piston to a new rest position a little further out A small amount of oil from the reservoir supplements the oil in the brake line to compensate for the difference in piston position so that the length of the brake lever stroke remains unchanged and the brake never needs adjustment The caliper A oil seal and the cup at the h of the master cylinder piston are made of an and heat resistant rubber composition for performance and to prevent their contamina the brake fluid by deterioration For this re only standard parts should be used Caliper Assembly 20 Caliper A 21 Caliper B 22 Alien head Shaft 25 Oil Seal 26 Dust Seal 27 Pad A 30 Screw 31 Lock Washer 32 Dust Seal 35 Bleeder Valve Cap 36 Nipple 37 Cylinder

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