Can i use my car to charge my motorcycle battery?

i have a 1987 yamaha virago 1100. i went to the mall and left my lights on. battery was completely dead. i jumped started it with my wifes car and had the car of not running and it worked immediatly.
i drove from the mall home. maybe a 30 minutes ride. i came home and turned it off. Right now it doesnt start back

i have a 1987 yamaha virago 1100. i went to the mall and left my lights on. battery was completely dead. i jumped started it with my wifes car and had the car of not running and it worked immediatly.
i drove from the mall home. maybe a 30 minutes ride. i came home and turned it off. Right now it doesnt start back up.

The lights come on everything comes on. When i try to start it i only hear a faint sound on the left side of my bike which i think its the starter. I dont think it has enough juice to crank over just to run the lights. Is there any way i can use my CAR to charge my motorcycle battery to full.i was told that the charging system on a motorcycle is just made to keep the battery TOPPED OFF and not made to runn the motorcycle and everything else and if i keep jump starting it i will prematurely kill my charging system. Can i leave it hooked up to my car and it will charge? if so do i let the car run ot just leave the car off. also if i do this will i drain the cars battery?

Best Answer:

Megan: First of all it takes 14-15 volts to charge a 12 volt car battery. And it takes about 5 amps to charge it in any reasonable time period.

So you need a 15 volt adaptor that is rated at 5 amps. You will need an ammeter to monitor the charge rate, otherwise you will overcharge and damage the battery. And a voltmeter to monitor the state of charge.

Best is to get a battery charger. Small ones are not very expensive and they will control charge rate to avoid damage to the battery.

.

Other answer:

Megan:
Yes you can use a car to charge a motorcycle battery, but it's kind of a dumb idea running the car for several hours to charge the battery.

Jump the bike again and take it for a long ride, like 90 min. or 2 hrs. That should give it enough of a charge that it will start next time, and eventually it will fill up.

Or buy a cheap battery charger. Look at Wal Mart, they probably have one under $20. Or Harbor Freight if you have one in your neighborhood. Or ask friends if you can borrow one.

It's possible the battery is dead. If you charge it for 5 or 6 hrs (which is what it would take to fill it up at the rate it can be charged) and it's dead the next morning, you need a new battery.

Dimo J:
" … i was told that the charging system on a motorcycle is just made to keep the battery TOPPED OFF and not made to runn the motorcycle and everything else and if i keep jump starting it i will prematurely kill my charging system…. "

The Idiots that said your bike cannot charge the battery are idiots — stop listening to them, don't trust them.

You can jump a car battery to your motorcycle to start the motor. Take a half hour ride and the battery will have starting charge.

Flattening a battery is a good way to kill it. Seems like you did it. Get a new battery.

A standard flooded lead-acid battery will survive twice being flattened, less if it is a few years old. An AGM battery can do deep cycle service and will (1) survive flattening at least five times and (2) will keep a starting charge sitting unused for 4 months. A new battery will arrive with bottles with acid to be added to the battery and then you need to charge the battery for several hours. A new AGM battery will arrive charged up and ready to ride.

http://www.batterymart.com/p-Big-Crank-E…

curmudgeon55:
Yes, may be a bit messy. need to have engine running and cycle battery connected in parrellel to car battery. Alternate is a cigarette lighter accessery cable plugin and have cycle battery inside car while running errands, trickle charge it. another way might help- with car engine off, connect jumper cables or test leads wire from car battery to cycle battery and let set overnight. car battery with a 13+ volt charge will do a slow 'balance charge' to cycle battery, may get it up to high enough voltage to start cycle. 1/2 run time from discharge is NOT enough to charge a 20amp hour or so cycle battery that needed a jump from light draw. IF you have a full tank of gas and a 2 hour run, can have a companion with jumpers riding with you, can get a fair charge that way, been done a couple times from long runs, some to or from rallies. refill at gas station and bump start might be needed then. cycle battery needs a 4 to 8 hour trickle charge to get up to voltage to turn starter. Lights work at 8 to 9 volts, starter just clicks indicates less than 11 volts minimum. .
Fred:
A charged battery connected to a battery at a low electro-chemical charge status will not have a high enough voltage energy level to overcome the chemical resistance required to transfer electrical energy into the low voltage energy status battery. … or will not transfer enough energy to bring a voltage level high enough to fully charge the lower level battery into a working voltage level because of the chemical resistance required to fully charge a discharged battery.

A 'rested' (three hours or more) fully charged battery has around 12.6 volts. It takes 14.5 volts to overcome the chemical resistance required to add electro-chemical energy to a discharged battery and bring it into a fully charged state and exposure to that energy level for a few hours. Exposing a non fully charged battery to an energy of only 12.6 volts will transfer energy to a discharged battery only to a level of around 10.5 volts ( or less as the voltage charge of the fully charged batteries energy level diminishes) .. a large waste of your time and still not enough to start your motorcycle.

Adding electrical energy (60-70 amps) with a car motor running at high speeds may damage your motorcycle's small charging system. Removing the battery leads from the motorcycle only takes a moment, repair of your motorcycle's charging system will take a great deal of money, time, and perhaps wait for parts and/or mechanic.

The short ride home from the mall to your home didn't allow enough time and energy for your motorcycles battery to receive a full electro-chemical amp/hour charge.

Buy a small amperage low priced battery charger, fully charge the small motorcycle battery, and save your wife the grief of coming to your rescue!

If that battery has received low voltage damage and continues to fail replace the battery with a new one after checking the motorcycle's charging system status.

Candid Chris:
The car battery will not charge the bike's unless the car's engine is running at an above idle RPM for about an hour and the bike's battery should be off of the bike.

Best to have a low amp charger and charge it for several hours, I use a 1A charger for about 4 hrs when needed.

adam:
why not use the car to get a battery charger.
Bikerboy:
yes , make sure you disconnect the battery from the bike first.

Leave a Reply