How to jump start another vehicle?

[Ronnie_space]

Can I jump start my BMW F650GS motorbike from my '08 3.0 coupe?

If so do I jump direct from the battery, from the points under the bonnet or either?

Do I have to be careful of anything besides ensuring correct polarity?

Thanks

Ronnie

 

[hopz121]

Never jump off of the battery!

Always use dedicated points under the bonnet

 

[Taz]

Never jump off of the battery!

Always use dedicated points under the bonnet

???????????

i think some old bikes were 6V so watch for that

 

[Mister T]

Be fine, jump away.

I jumped my Nissan off my 123d loads of times, and I jumped it off the battery...

 

[Dave1971]

I've been told that if you do jump start a bike from a car don't have the car running like you would if you were jumping another car. From what I can gather you could fry the electrics with the extra umph that a bigger car battery has when it's also getting charged from the alternator.

 

[Ronnie_space]

Thanks for all the replies gents.

Will give it a go this weekend. Noted on leaving the engine off.

As a side note I was looking at getting a jump starter pack for my bike, but these are quite big and I don't have much space in the flat I live in... But came across these packs which I thought were interesting!

About the size of a USB hard drive

http://www.amazon.co.uk/gp/aw/d/B00...mp+starter&dpPl=1&dpID=41-ntnqnq-L&ref=plSrch

Ronnie

 

[Nictrix]

Never jump off of the battery!

Always use dedicated points under the bonnet

???????????

i think some old bikes were 6V so watch for that

Most bikes are all 12V nowadays and have been for a long time, I dont think there are any built now that are 6V.
It has been known for some electrics to be fried on bikes like the ECU or the clocks when jumping from something with a bigger powered battery.
Cant you just push it down a hill and bump start it or just charge the battery first?

 

[Taz]

Cant you just push it down a hill and bump start it

that would definately be my first plan of attack

 

[Taz]

It has been known for some electrics to be fried on bikes like the ECU or the clocks when jumping from something with a bigger powered battery.

this confusses me, do the electrics not draw the curret they require, in which case how can things get fried, surely a bike alternator puts out a similar voltage, i'm guessing about 15V the same as a cars alternator

 

[Nictrix]

It has been known for some electrics to be fried on bikes like the ECU or the clocks when jumping from something with a bigger powered battery.

this confusses me, do the electrics not draw the curret they require, in which case how can things get fried, surely a bike alternator puts out a similar voltage, i'm guessing about 15V the same as a cars alternator

Not sure how it happens but there have been reports with Yamahas R1 4C8 and 14B models after jumping it from a car that the clocks/dash has had errors caused by the jump rendering them useless.
Theres so much electronics involved everywhere these days it must be easy to blow something.