can i jump start with car battery?
 

was on my way out this morning but she won't start, just buzzing, could i jump start it with the car battery? and how? battery is only 6 months old. i believe i drained it the night before while i was testing my lights! i know how to start it by pushing it and releasing the clutch on 2nd gear, done it before many times, but i am afraid i won't find someone to push me this time! would appreciate the help. thanks.

RE: can i jump start with car battery?
 

[sm=badidea.gif]DO NOT JUMP START WITH A CAR. You're gonna have to do your push start method to get it going. Then go for a long ride and keep the revs high so that the alternator can do it's job and charge up the battery. If it still dies afterwards, consider getting a battery tender/charger to juice it up.

RE: can i jump start with car battery?
 

I don't know the exact term.....but car batteries have much more "power" than motorcycle batteries do. So you run the risk of frying your electrics or possibly "blowing up" the motorcycle battery.

I would just get a trickle charger and charge the battery.........either that or push start it.

RE: can i jump start with car battery?
 

i dont understand why you couldnt use a car. there both 12v systems. the fact that a car battery has more cranking amps just means you can put more of a draw on the battery not that it puts out more power.

im not saying you should go hook your motorcycle to a car battery. i just dont see why you couldnt.

if you do use a car make sure its not runing when you jump start the bike becuase the charging system on a car will put to much power toward the bike and most likely frie your power regulator

RE: can i jump start with car battery?
 

Borrowed from someone that knows
The issue is that cars (and 'wings and a very few other bikes) have a different type of alternator than our Shadows (and most other motorcycles) have.
Basic theory idea, for those who came in late: Generators of all types make electricity by moving a magnetic field relative to a coil of wire. The stronger the magnetic field and the faster it moves, the more electricity is generated. The moving part is usually called an armature or rotor. The stationary part is called a stator.
The typical car alternator is an excited field type. The magnetic field is created by an electromagnet in the rotor. Supply voltage is controlled by the amount of current going through the electromagnet. Most big AC generators are made this way. If an external power source is applied of a higher voltage than the regulator setpoint is applied to the system, the regulator will recognize the system voltage as being above setpoint and turn the field magnet (usually rotor) off. Result: No problem, as long as the applied voltage isn't so high as to damage anything (typically 25 V or higher on a 12V system). So you can (usually) jump start a car with another car, or a GoldWing without any problems.
Now the bad news:
Most motorcycles don't use an electromagnet to create the magnetic field. Instead ,we have a drum-shaped rotor (usually on the crankshaft) with several permanent magnets placed inside (a magneto). These magnets moving past the stator coils create the electricity we need to run the lights, charge the battery, etc. But you can't change the strength of a permanent magnet. So regulating the generator output is not a straightforward issue of turning the field magnet strength up or down.
The motorcycle voltage regulators I've seen all take the approach of shunting excess generated power to ground. This has the advantage of making sure that the voltage is the same everywhere in the system, but the disadvantage of meaning that the stator is always flowing its maximum rated supply current. This, I think, is why many motorcycles have a reputation for frying stators.
So the design of one of these regulators is completely different from a cage regulator. It has a voltage detection part, like the other regulators, but the big resistor/power transistor package has to be strong enough to carry all the possible excess power generation to ground. It handles a lot more power than the car regulator has to. It generates a lot of heat as it does this, which is why the regulator on my '85 VT1100 is finned and out in the open air--to carry off the heat before it cooks something in or around the regulator. A typical bike magneto makes 30-50 amps at max power. So the regulator is designed to dissipate a maximum of about 700 watts for short periods (this would be full power and no loads on the bike--the battery and lights are all missing). In practice, this cooks the regulator pretty fast--they don't like to dissipate more than about 200 watts for any length of time.
Now consider what happens when your moto regulator is doing a good job keeping the system at a nominal 14.1 volts when running, but the battery is weak, so you have to jump-start it on cold mornings. You hook up the bike to your Toyota with a 95 amp alternator (max output about 1400 watts). The Toyota's voltage regulator keeps *its* system at a cozy 14.3 volts when the engine is running. We now have a problem.
The cage's alternator and regulator want to maintain the system at 14.3 volts. Your bike's regulator, the instant the system is turned on, is going to try to bleed off excess voltage from the system to keep it at 14.1 volts. The car's alternator is rated for 1400 watts. The bike's regulator can dissipate a maximum of 700 for (very) short periods before it

RE: can i jump start with car battery?
 

wow that areally helps TheX, thanx.
so let me ge this straight, i should jump start the bike with the car off and both bikes headlights on?

http://www.yuasabatteries.com/batter...7&vID=1869

RE: can i jump start with car battery?
 

Because there is a different amount of CCA's on batteries amoung different vehicles. A car may have 600-900 rating of CCA's, meaning it provided that amount (600-900) amps of current to the system and start up and every 30 seconds. A motorcycle battery may have around a 300 rating, which is half+ of a car baterry, therefore overloading the battery and system with the amount of amps it gives off.

RE: can i jump start with car battery?
 

have as many things in the car on like lights, stero and other crap u have in it. the car not on. then yea u can jump start.

the term i belive is amps. you cant start a car with 8 AA batteres even tho there both 12V. a car batt has way more amps as it needs it.

RE: can i jump start with car battery?
 

i understand what crank amps are. people go jump over a 200 cranking amp in there car when chaning batteires. the amperage is the amout of energy you can draw from my understanding not the amout it puts out you but 12v out but you can only draw 300 amps. hence why AA batteries are 12v but not strong enogh to start a car they dont have the amps

RE: can i jump start with car battery?
 

You can jump it FINE. You won't need the car running because of the LOW draw from the bike.

RE: can i jump start with car battery?
 

It's interesting the misconceptions about amp ratings. A car battery is capable of flowing more amps, but it doesn't force them out. Amps is equal to Volts / Resistance.

RE: can i jump start with car battery?
 

Ohms law :D

RE: can i jump start with car battery?
 

Damn there are all kinds of crazy ideas out there :DBottom line is Yes, you can jump start your motorcycle off of a car battery, but the car MUST NOT be on, and as far as having all the accesories on that seems like over kill! Your headlight on your bike should automaticly come on, so no need to turn it on, but once you get it running it will bea good idea to go for at least a 30 min ride just to ensure that the battery has adequite time to recharge itself, If the next day rolls around and it still won't start you might need to envest in a new battery. Just my .02

RE: can i jump start with car battery?
 

Sorry about the bad morning, but I need to ask where you got your wheel decals or did they come like that.............

RE: can i jump start with car battery?
 

i did it with no problem. will probably do it again if i have to.

RE: can i jump start with car battery?
 

i did it! i jump started it off my honda delsol (honda jumps a honda :D!)
hook the jumper cable to the + in your bike then to the + in the car (with the car off), then the - cable to the - in the car and then to the - in your bike for 2 secs and then start the bike. unhook thecable inreverseorder (- from bike, - from car, + from car then finally + from bike),then takeher for a spin [sm=gears.gif]



phsycleRRi made those stickers, they're superb, they're reflective vinyl, car lightsmake it shine andlook super cool [8D]nothing much to it really, just some hand in Adobe Illustrator and any printer shop with the right vinyl cutting machine and correct sizes of the honda logo.
if u want to stick anything inside the wheel make sure u stick on opposite sides equally to keep the balance right.

RE: can i jump start with car battery?
 

Its fine...go ahead.....though in all cases, as soon as the jumped vehicle is running, I disconnect one of them.

there is so much loss across a set of jumper cables, you won't have 14.3 versus 14.1 conflict....you're lucky to get 13. Electrical systems don't PUSH amps...Amps are drawn based on need...and as mentioned the "need" is driven by the v=i*r relationship.

The rectifier also only works in one direction....its a diode bridge...power from the vehicle giving the jump vehicle doesn't go backwards in that part of thesystem.

A 12v the battery will only be at 13.2, the charging system is 14.4 nominally....just mental notes for you.

Also, if you lead acid battery sat dead for more than a day or two, its junk...not immediately, but you sure shortened its life. If it sat like that 6 months....junk..probably won;t hold a charge for more than a day, if at all. For a simple explanation, the lead plates soakd up the acid and their ability to hold electrons is greatly diminished.

RE: can i jump start with car battery?
 

i work at a bike shop and i use a big ass desial truck battery to jump start the bikes... works just fine.

RE: can i jump start with car battery?
 

mccannf3, your the only one who answered this with a proper response. Good man!!! Car off, start your bike. Done.

RE: can i jump start with car battery?
 

trickle charge worked for me. charge it for about 2-3 hours and put the battery back in, mne fired right up after this and has been great ever since, DO NOT USE a car to jump it!

RE: can i jump start with car battery?
 

Dont know if it means much, but i jumped my bike with a car
Jumpbox before (about 3-4 months ago)and have had no problems...

RE: can i jump start with car battery?
 

Why not push start you sissies:D, much easier than unscrewing the seat, finding cables, moving a car, blah blah blah. Run yer bike as fast as you can then hop on,10 sec.

ashsammy wanna make me a set of those bad boys?? (For$$$ of course.)

RE: can i jump start with car battery?
 

u need to push it at least 20kmph while holding the clutch (i could only do 14 !), or if there's a parking lot ramp around u so u can just roll down, and i would worry about loosing balance and dropping the bike!! so i guess it needs practice if you're a noob like me :eek:

set of what? u mean the inside rim stickers? if so then i attached a file 4xHonda.txt, save it to disk and change the ext to .pdf, its a set of 4 honda logos sized to fit into the rim, then look up a print shop near you and send them the file (Kinko's, or any shop that has a vynil dye-cut machine), just tell them u need it dye-cut on reflective sheet whatever colour u like (reflective sheet usually comes in 6 colours only). i wouldn't recommend sticking anything into the front rim, it could affect the balancing and cause headshake. the easiest way to stick'em in the rear rim equally is to refer to the position of the spokes.

RE: can i jump start with car battery?
 

you dont have to push it that fast, I can start mine in about 8-10 strides (30ft).
Thanks for the link too.