Honda CB125 CB160 (1972) [23/139] Caution

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3 2 CYLINDER HEAD AND CYLINDER II Assembly 1 When the adjusting screw of the rocker arm is turned back fully set it to the rocker arm pin and assemble it in reverse order of disassembly 2 The stanard tappet clearance is 0 03 to 0 05 mm 0 012 to 0 020 in when the engine is cold CAUTION Correct or replace the unit when the cam is scored or worn unevenly D Description of rocker arm The rocker arm is an important unit which changes the rotating motion of the camshaft to reciprocating motion for the valve The rocker arm contact surface is finish treated after hardening The tappet adjusting screw is coupled at the other end and pushes up the valve at the tip of the screw 1 Dissassembly 1 Refer to section C above When the right and Fig 3 30 Removing valve rocker arm left covers are removed removal can be made Refer to Fig 3 30 II Assembly 1 Inspect the rocker arm contact surface and replace the unit if there is scoring 2 When the rocker arm shaft is being assembled the rocker arm should be matched to the oil pool Fig 3 31 Rocker arm shaft groove Refer to Fig 3 31 3 When the rocker arm has been disassembled and reassembled the tappet clearance valve clearance should be measured and adjusted Adjustment should be performed at the position where the T mark of the A C generator rotor and the arrow mark of the stator are matched Compression top dead center Refer to Fig 3 32 Fig 3 32 Adjustment of tappet clearance 17

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