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Discussion Starter #1
Hi there,

Here is my problem: I use my bike not regularly and it is parked in a parking with no AC plug. Therefore I always remove the battery and bring it home to keep it charged on the AC via an Optimate 4. Drawback of this is that I need to screw and unscrew the battery in order to put in place the Optimate connectors and then plug the battery back to the motorbike electric cables.

My idea was to always keep the Optimate connectors screwed to the battery and, on the motorbike side, connect the + and - of the bike to cables joining themselves into an Optimate female connector. This way I would simply unplug my battery from the Optimate, walk down with my battery and connect it directly the Optimate female connector linked to the motorbike wiring, without having any screw to unscrew and rescrew.

My question is as follows: is there any electric risk in doing that? I know that the engine sucks up a lot of the battery when starting the engine and am not sure that the Optimate connectors can hold such electric power.

Thanks in advance for your help.

G.
 

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Sorry, won't work. You need those large gauge cables to carry the starter current loads....and even the regular loads need a slightly larger wire gauge.

Now if you could fab up an Anderson type high current plug onto the bike harness and to appropriate cables to the battery, with charger leads in parallel, that would work.

Many race bikes have this type connector for starting with a very small battery and light gauge wires for running the bike after disconnecting the starting power source.

http://www.andersonpower.com/products/multipole-connectors.html
 

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Discussion Starter #3
Hi,

Thanks for that. I was indeed thinking about replacing the optimate wiring anc connectors into heavy duty ones so that they could work to both charge the battery when using the optimate and being used to start the engine. What cable section do you think I need? The battery is an 8Amp so not a problem, but what type of watts do I need? Do you think a 1.5mm2 cable would be good enough? I then thought about this kind of connectors: http://www.demon-tweeks.co.uk/motorsport/wiring-connectors/lma-waterproof-connectors They can hold 20 Amp and 1.5mm2 wires and are water proof. Would that work?

Thanks again for your help.
 

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It's about the Cranking amperage mate, those cables need to carry about 220A if I'm not mistaken. It would be much easier to install a battery isolating switch on your bike, under the seat. That way your batterie won't go flat so fast.

This is the type of connection Ed was reffering to I think.
 

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That's the ticket Donsy.....

Starter current draw can hit well over 200 amps momentarily when the button is pressed. Constant cranking current will run around 80~90 amps. The cables must be at least the same gauge as the ones on the bike now (8 gauge?).
 

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Usually sold as a pair.....that looks like a replacement male plug for an electric golf car charger.
 

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Discussion Starter #8
My mistake, called them and the SBS connectors are neither male nor female. I need to buy two of the same ones and one slide into the other one when flipped over. Just need to take care of + vs - when installing the cables.
I think I am getting close but these connectors are really big... 10cm long, 5cm wide and 2cm high when connected together... will take quite some room under the seat...
 
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