Question about 1984 Honda CB 700 SC Nighthawk

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Every morning when i wake up my battery is dead. I charged it and the bike worked fine. What could be the problem?

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Disconnect the battery & if dead in the morning it has lost (not leaked) its charge, probably due to being sulphated-up
Some smart-chargers (like the Optimiser) can recover lightly damaged batteries.
If it is OK in the morning then something (alarm?) is draining the weak battery

Ride safe
Bike-Doc
Please mark this as very helpful (if it has been!!)

Posted on Apr 23, 2010

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1 Answer

I have a 1993 honda cb 250. Battery was dead and dead but i could jump start it and or push and pop clutch and get it going. I got a new battery and installed correctly but will not hold charge.


Check and see if magneto is charging.
my just be putting out enough to run lights.
or there is a diode that prevents it from discharging.
after riding make sure there is enough charge to start the bike. Disconnect the battery, come back in the morning if the battery starts bike then the diode is probably shot and allowing magneto to discharge battery

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Bike gives a click as if it has a dead battery but the battery is charged and starts other bikes fine


If the batteries good its probably a bad ground. make sure the hot and negative wires are good from the battery AND where they end up. The ground wire usually grounds to the frame somewhere, trace the ENTIRE wire!

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2004 750 Honda Shadow Aero with a recently replaced battery had lost charge one morning so I recharged but saw a noticeable rate of voltage drop after charging finished. Bike started fine, but the drop was...


Check the brake light switches, especially the rear,
and basically the whole wiring harness, including any accessories.
Those problems can be tough to solve.

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3 Answers

I had my battery tested in the bike i just purchased 2 b sure it was ok and it tested fine but while on a short ride it stalled out & failrd to restart,as if the battery were dead.i put the battery on


with the bike running
put a volt meter across both battery terminals to see if it is getting charged

the bike has a rectifyer and a the stator working to charge the battery as it is running
the stator is driven off the crankshaft inside the engine casing casing

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Apr 30, 2017 | 1993 Honda CBR 1000 F

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The bike was running fine in the evening. Rode to work parked the bike took the key out. The battery was dead in the morning. Put the 10 amp charger on and the motor started to turn over with the key off!...


your starter button is malfunctioning. maybe some oxidation in the switch. when starter button is pressed in that can cause your other electrical stuff to not work.

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When i charge my battery its all full bars i hold the phone in my pocket whole day (its still fully charge) when i got to bed at night and wake up in the morning the bettery is (half way) i hold the phone...


Depends on whats running and what you use it for during its use. Technically shutting it off to reset it once a day is good, but it being half dead a day and half later is pretty normal

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1 Answer

Starting The Bike On A Cold Morning


Try putting in new, stock spark plugs. Check and possibly replace the air filter. Charge the battery. Get the bike running then check the battery voltage at 2000 rpm. It should show 14volts or more. If not, get the charging system checked. Get a can of starting spray (for future problems).

Get the compression checked. Your bike is 21 years old and I will bet that the valves are needing to be reseated. Check the valve clearances with a cold engine and reset valve clearances as needed. Check the area where the head contacts th cylinder. Any mist of an oil stain? Tighten the head or replace the head gasket. If replacing the gasket, now is the time to have the shop lap re-seat the valves. Have them sync and balance the carbs as well. Your bike will now have its' manners back and show you the dedication it should.

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1 Answer

Battery question


No, that is not typical. What might have happened is this: If there was an appointment reminder in your calendar, it could have woken up the unit and left it on till the battery was dead. There should be settings that will allow you to either disable the waking feature or make the unit turn off after being inactive for a certain amount of time.

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