Honda CB125 CB160 (1972) [90/139] Refer to fig 5 15

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84 5 ELECTRICAL PARTS C Capacitor The capacitor avoids generation of harmful sparks between points That is when high voltage is gene rated at the secondary coil of the ignition coil by switching at the the the points primary primary voltages coil additional Self current tends to is is current points generated voltage disconnected continue cause sparks between voltage induction When self induction transmission and This results in burnt points a reduction of secondary coil week voltage ignition sparks or causes fire The capacitor absorbs self induction voltage quickly The capacitor employed in automotive vehicles usually consists of a belt shaped thin metallic foil and insulation which are alternatively folded and rolled Electricity is stored in the capacitor when voltage is applied to the metallic fold The larger the metallic foil and the thinner the insulator the greater will be the capacity When electrical capacity is excessively large spark performance is hindered The correct electrical value is generally between 0 1 to 0 35 F High voltage is applied to the capacitor when the point is opened In accordance to JIS the specified voltage distribution value is 30 minutes after heating at 80 C the insulation resistance should be more than 5 MQ and should remain at this value in excess of one minute at 700 VAC 50 to 60 cps Refer to Fig 5 13 and 5 14 To test the capacitor both capacitor terminals are separated from the megger while the megger is rotat ing and then both terminals are shorted If sufficient sparks are generated capacity value is considered normal A capacity capacity and change insulation value rarely can occurs be Correct obtained by employing a service tester Refer to Fig 5 15 D Breaker points The breaker point interrupts the primary circuit of the ignition coil or magnetic ignition coil Generally in the case of the rotating magnet type the contact breaker is included in the body In the coupled type the breaker point is coupled the stator and in the case of the separate type flywheel generator and battery ignition system the single unti type breaker system is employed In Models CB 125 and CB 160 the breaker point is installed to the right end of the camshaft together with the spark advance mechanism Refer to Fig 5 16

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