Honda CB125 CB160 (1972) [111/139] Refer to fig 5 85

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5 5 SELF STARTER b Attention is directed to magnetic force Insure that the roller spring and other parts around the clutch are not magnetized as roller movement is affected by even small resistance c At assembly insure that small parts the spring cap etc are assembled as they are drawn toward the rotor by magnetic force AC generation may be destroyed by movement of the rotor C Starter solenoid As the current for rotation of the starting motor attains 100 A heavy wire is required to reduce the resistance The contact section of the switch em ployed for interruption of this current should also be large It is difficult to install the switch when applying DC current to starting motor In such a case a switch employing an electro magnet is installed at the most convenient position between the battery and starting motor with another switch installed at a different location for remote control which operates the electromagnet by a small current Refer to Fig 5 85 1 Principle of operation a When current is applied to the primary side the electromagnet operates and attracts the iron core which resists spring force b The contact point at the tip of the iron core connects the secondary circuit Refer to Fig 5 86 2 Caution a When 12 V current is applied between terminals of the secondary circuit and if a click sound is heard the contact points of the secondary circuit Fig 5 87 Disassembly of solenoid when the cover is opened are closed b During prolonged use the contact sections are burned due to large current and resistance increases to block the current in many cases even when the click is heard the starting motor does not turn In such a case by disassembly the contact sections should be polished with a file or sand paper to obtain favorable contact Disassembly should be performed with the switch removed from the body c The current at the primary side should be below 12 V 3 5 A Refer to Fig 5 87 and 5 88 Fig 5 88 Disassembly of solenoid components 105

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