Jumping my bike from a car - VTXOA
 7Likes
Reply
 
LinkBack Thread Tools
post #1 of 11 (permalink) Old 09-20-2019, 05:20 PM Thread Starter
Senior Member
 
Join Date: Jun 2004
Location: Denver and Chicago
Posts: 8,317
Jumping my bike from a car

Well I finally did it.... again....

I left the keys in the bike with the bike on. Good news - no one stole it. Bad news, the battery drained. I could only jump it from a nearby car since there was nothing nearby. It was only connected for perhaps 25 seconds (long enough to start it from zero).

I figure worst case it fried the battery although it starts fine. Anything I should look for in the electrical system that might be damaged?

Do not go gentle into that good night. Rage, rage against the dying of the light - Dylan Thomas
All that is necessary for the triumph of evil is that good men do nothing - Edmund Burke
If you can, help others; if you cannot do that, at least do not harm them. - Dalai Lama
Mowoc is offline  
Sponsored Links
Advertisement
 
post #2 of 11 (permalink) Old 09-20-2019, 05:46 PM
Senior Member
 
Harkon's Avatar
 
Join Date: May 2010
Location: Calgary, Alberta, Canada
Posts: 4,920
I would not leave the car running while trying to start a bike. If the car is not running there really isn't anything that can be damaged on the bike.
RBS, skeeter69392 and Blaine C like this.


'12 Road Glide Ultra, Kuryakyn Alley Cat intake, Jackpot Super Duals header, Jackpot HiRoller mufflers, PV Tuner, Daymaker LEDs
Harkon is online now  
post #3 of 11 (permalink) Old 09-20-2019, 06:16 PM Thread Starter
Senior Member
 
Join Date: Jun 2004
Location: Denver and Chicago
Posts: 8,317
agreed.

My question really was what can be damaged. If its just the battery - fine. I can deal with that. Is there something else (solenoid, or switch) that can have issues?

It seems logical that the batter might have issues if there is a power surge since it is the ingress for the jump.

BTW, the guy just started the car - I didn't even see him jump in the car. It was literally as I was keying the bike and starting it. I got home and I am safe so that part is all good.

Do not go gentle into that good night. Rage, rage against the dying of the light - Dylan Thomas
All that is necessary for the triumph of evil is that good men do nothing - Edmund Burke
If you can, help others; if you cannot do that, at least do not harm them. - Dalai Lama
Mowoc is offline  
 
post #4 of 11 (permalink) Old 09-20-2019, 06:53 PM Thread Starter
Senior Member
 
Join Date: Jun 2004
Location: Denver and Chicago
Posts: 8,317
I found this for those that are curious:

https://advrider.com/f/threads/will-...-system.66214/

Apparently its fine - the issue is not the over charging or even the running/non running. Its the spark from the dead/low battery igniting a hydrogen explosion and royally screwing your day up by throwing acid all over you.

Do not go gentle into that good night. Rage, rage against the dying of the light - Dylan Thomas
All that is necessary for the triumph of evil is that good men do nothing - Edmund Burke
If you can, help others; if you cannot do that, at least do not harm them. - Dalai Lama
Mowoc is offline  
post #5 of 11 (permalink) Old 09-21-2019, 05:21 PM
Senior Member
 
Harkon's Avatar
 
Join Date: May 2010
Location: Calgary, Alberta, Canada
Posts: 4,920
Quote:
Originally Posted by Mowoc View Post
I found this for those that are curious:

https://advrider.com/f/threads/will-...-system.66214/

Apparently its fine - the issue is not the over charging or even the running/non running. Its the spark from the dead/low battery igniting a hydrogen explosion and royally screwing your day up by throwing acid all over you.
Right, they are both 12Vdc lead acid systems so there is nothing that could possibly damage one or the other. There is an established process by which one should connect and disconnect to minimize the possibility of injury.


I the case the car is running and the bike starts, you now have two charging systems of significantly different capacities possibly creating a conflict. There is a possibility the rectifier/regulator of the bike might be damaged if the jumper cables are not removed quickly upon starting. As the car battery has significant capacity to start a bike, and restart the car afterwards, it makes sense to me to take the extra precaution of leaving the car ignition off. Only as a precaution mind you.


'12 Road Glide Ultra, Kuryakyn Alley Cat intake, Jackpot Super Duals header, Jackpot HiRoller mufflers, PV Tuner, Daymaker LEDs
Harkon is online now  
post #6 of 11 (permalink) Old 09-21-2019, 11:19 PM
Senior Member
 
skeeter69392's Avatar
 
Join Date: Jan 2010
Location: rochester new york
Posts: 286
yup with the car off
jumped bikes,,atv,,lawnmowers no issues
skeeter69392 is offline  
post #7 of 11 (permalink) Old 09-22-2019, 08:46 AM
Senior Member
 
Blaine C's Avatar
 
Join Date: Aug 2018
Location: Prince Edward Island
Posts: 110
Garage
Quote:
Originally Posted by Harkon View Post
Right, they are both 12Vdc lead acid systems so there is nothing that could possibly damage one or the other. There is an established process by which one should connect and disconnect to minimize the possibility of injury.


I the case the car is running and the bike starts, you now have two charging systems of significantly different capacities possibly creating a conflict. There is a possibility the rectifier/regulator of the bike might be damaged if the jumper cables are not removed quickly upon starting. As the car battery has significant capacity to start a bike, and restart the car afterwards, it makes sense to me to take the extra precaution of leaving the car ignition off. Only as a precaution mind you.
With car running its more amps that the bike system was designed for...Can also destroy the ECU....(Seen it happen more than once)
Blaine C is offline  
post #8 of 11 (permalink) Old 09-22-2019, 09:22 AM
Old Goat
 
TennX's Avatar
 
Join Date: Jul 2006
Location: Memphis,Tn.
Posts: 23,903
AS mentioned be careful when jumping anything...as a young man I went to help a stranger ....battery blew up in my face...only thing that saved my eyes that time were my sunglasses.....


Phil...(72)”Nobody told me I die at the end”
2006 (bought new)...1300R Candy Black Cherry,darkside,foots mod.. ..
TennX is offline  
post #9 of 11 (permalink) Old 09-22-2019, 10:08 AM
Senior Member
 
Donnie Downer's Avatar
 
Join Date: Jan 2010
Location: Mass
Posts: 1,890
I was expecting something completely different

https://youtu.be/7ax-9yJs78Y
Donnie Downer is offline  
post #10 of 11 (permalink) Old 09-22-2019, 11:47 AM
Senior Member
 
enduro's Avatar
 
Join Date: Jun 2008
Location: Montrose, Pa.
Posts: 1,622
Quote:
Originally Posted by Blaine C View Post
With car running its more amps that the bike system was designed for...Can also destroy the ECU....(Seen it happen more than once)
At a set voltage you can't force excess electricity into something, the load determines the current. Your bike battery alone is capable of over 100A. A car/truck works on a 12V system same as the bike, both systems are charged from 14.2-14.4V charging systems. Standard alternators output less than 100A, a high output alternator is capable of 100-150A output and so is your bike battery. If you charge off a non-running vehicle or just a bare auto battery it might be capable of providing over 1000A from a full size battery. Doesn't matter as the bike (the load) determines how much current it will use. You could have a dual battery system capable of over 2000A and it still isn't going to hurt the bike. You can't force excess current thru a load while holding the voltage constant, electrical laws prevent it.

At home you have a 200A service with multiple 20A receptacles, plug in a .004A (.5W) night light and it doesn't blow because 20A is available. It uses what it needs and you can't force more through it.
A running diesel truck with dual batteries can supply over 2000A from the batteries and additionally 150A from the alternator. Nothing electrical is turned on, you open the door and the little inside cab light comes on. It is not damaged even though over 2150A are available, because the voltage is held at 14V and the current (load) is determined by the light itself, constant voltage and constant load equals constant current.
Harkon, rangers4u, frnkcat and 1 others like this.

05 1300R -sadly sold 04 BMW K1200LT - Luxury Tourer, smooth efficient quiet power,sporty mile eater 05 BMW F650GS - rugged and elegant adventure tourer, does it all well, high speedcruising to rough dirt roads
IBA: SS1000,SS2000, SS3000, BBG1500, 50CC, UCC, LGL1000, 4 Corners
enduro is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the VTXOA forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome