My New "Battery Box"

[5-7HEAVEN]

When I installed an electric starter on my 212cc engine, I needed a battery to crank the engine.
So I'm using Milwaukee M18 cordless batteries I have at home.

I needed a hidden box for the battery and adaptor.

I decided to cut a 2.5l peanut tank in half to store the battery,
then mount it on the top tube like a regular fuel tank.

The electrical wiring enters/exits thru two 1" holes in the tank's bottom.

Actually, I sawed 2 tanks in half lengthwise, so each half would have its flange around its perimeter.
Four M5 bolts will secure the tank's halves together.

Despite its size, the battery barely fits in there, because of the tank's sloping feature.
It's so tight, I had to SHAVE the battery's top edge, to clear the tank top.

 

[5-7HEAVEN]

However, there's loads of room for shorter components, so I "filled the tank", lol.

A 4-circuit fuse box bolts onto the front of the mounting plate, followed by the battery.
The adaptor plugs in, under the battery, and bolts down to the plate.

A motorcycle alarm box is placed behind the battery, with the siren set atop the alarm.
The alarm has its own power in the battery box, from a small 9v battery.
It also has remote controls, to set the alarm
ANNNND to remote start the engine, from as far as 150 feet!

I installed a push-button battery disconnect switch, which is
bolted onto a plate I welded in the filler neck.
The gas cap still screws on, hiding the switch.

To get to the switch, I unscrew the gas cap, push the switch's button, then
screw the gas cap back into place.

If you look closely down the filler neck, you'll see the push-button switch.

The bottom of the switch drops down, between the fuse box and the battery.

Since the battery is 18 volts, I ordered a voltage reducer.

It will be installed under the fuse box.

I'm also installing motorcycle controls on my handlebars.
Some of its wiring will enter here, to connect 12 volts, horn, starter, etc.

I'll post pics of the latest battery box setup soon.

I need to wire all this up!

 

[5-7HEAVEN]

More pics

 

[wheelbender6]

Nice job. Mounting only my controller and the main switch in a gas kit fuel tank was a tight fit.

 

[5-7HEAVEN]

Nice job. Mounting only my controller and the main switch in a gas kit fuel tank was a tight fit.

Thanks.

Notice I had to clearance the battery's edges to fit in the tank.