1982 honda cb 750 custom?

Question

bike runs excellent but the battery is not charging . the battery is new bike will start and idle perfect no cold idle issues what is the most common part to go in terms of charging purposes. remove the battery and use jumpers bike starts remove positive cable dies . is it the recertifier the regulator the fuses are not burnt out i no it must be one certian part on the bike as the front fork seals seems to be replaced by everyone i have talked to thanks

Answer 1

3 yellow wires coming out of nearly all stators of road bikes, a few are white. Label them A B C and unhook them. at 2500 RPM you need 60 volts AC from any and all combination of 2 wires, IE a-c a-b b-c a-b. no voltmeter? use a 110 volt light bulb. should be good and bright at 3000 rpm across all 3 if this is correct your problem is rectifier or regulator, commonly one unit on newer bikes 2 units on older bikes. If you dont have Ac on those wires, you need to check your stator, feild windings, brushes, etc. BE warned your bike is a known "problem child" for bad stators, DO NOT REPLACE WITH USED. Fix it with NEW Parts only.

Answer 2

The rotor is the most common problem.

Then the brushes.

If the L crankcase cover is damaged (due to a fall) the brushes will be mis-aligned and mess everything up - the cover will have to be replaced if there are any signs of damage (ware marks, scratches).

Answer 3

Check and Clean ALL Electrical connections. Then charge the battery and use a volt meter to check the voltage at 2000 rpm and 4000 rpm. If it is 12v or Under You have Stator or RR problems. I'm not totally familiar with Hondas but most early UJM's (Universal Japanise Motorcycle) share common traits.

Answer 4

The 80s bikes have this thing call a "stator" that tend to burnt out.  It is located on the left side of the engine cover next to the front drive sprocket.  You'll have to either get another one or have yours rebuilt by a local electrical shop.