Honda CB125 CB160 (1972) [21/139] Refer to fig 3 22

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15 3 2 CYLINDER HEAD AND CYLINDER By sudden change of direction of the forced gas stream the breather separates by difference of gra vity oil in a gaseous state when the gas strikes the breather wall through centrifugal force Passing the interior pressure of the crankcase to the head vapori zes moisture by subjecting the gas to high tempera ture Refer to Fig 3 20 and Fig 3 21 I Disassembly and assembly The cylinder head includes the head cover break er camshaft valves and side cover in this section Fig 3 21 Principle of breather sub disassembly of the breather and breaker is simply treated 1 Disassembly and assembly of the breather sepa rator When the nuts of the cylinder and cylinder head are removed the head cover can be separated 2 Disassembly and assembly of breaker advancer a By removing the point cover separate the break er points base plate Refer to Fig 3 22 Fig 3 22 Removal of breaker point base plate ib Remove the spark advancer assembly from the cam shaft Refer to Fig 3 23 Before operation a rotation stop should be applied to the cam sorocket Fig 3 23 Disassembly of spark advance ic By removing the four 6X18 screws the point POINT BASE base is separated Refer to Fig 3 24 The point base serves as the bearing of the cam shaft without a bushing With oil grooves cut in the sliding portion this unit is residually lubricated by oil from cam lubrication d Assembly is the reverse order of disassembly e During assembly attention should be directed to the cut on the contact breaker base plate showing upward Fig 2 24 Removing point base

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