Lucas Rita Grounding

MichaelB · Aug 14, 2025

I currently have a LR on my Combat with Positive ground.
Can it be used with negative Ground?
Or is it polarity specific?

gforce · Aug 15, 2025

You need the "bistable" version of the RITA AB11 Amplifier, which is not standard in the Commando kit.

It has yellow markings/paint on the casing.

MichaelB · Aug 15, 2025

Thanks...

What is that thing on top side of the bottom on the upper picture.
Is that part of the 'bistable' package.

gforce · Aug 15, 2025

MichaelB said:
Thanks...

What is that thing on top side of the bottom on the upper picture.
Is that part of the 'bistable' package.

It's a ballast resistor - used on some bikes (like the Guzzi) as well as some triples that have 4 volt coils.

The Commando doesn't use the ballast resistor.

baz · Aug 15, 2025

MichaelB said:
I currently have a LR on my Combat with Positive ground.
Can it be used with negative Ground?
Or is it polarity specific?

I run my Lucas Rita negative earth
Have done for around 5 years

850cmndo · Aug 15, 2025

baz said:
I run my Lucas Rita negative earth
Have done for around 5 years

Same for 43 years..

baz · Aug 16, 2025

850cmndo said:
Same for 43 years..

I've had Lucas Rita for longer than I care to remember

I changed it a couple of years ago to one of the "Rex's speed shop" ones because I thought it'd use a little less amps at idle
But it made no difference,I still have the original bolted on next to the new one just incase

Lucas Rita Grounding

MichaelB

"Sons of Arthritus"

gforce

MichaelB

"Sons of Arthritus"

gforce

baz

850cmndo

baz

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