The smallest Voltmeter I was able to find was this unit. It is about 1.44 inches across and 1 inch deep.
http://amzn.com/B00LUMIQJO
This worked out for my GS550L which has no room around the instrument cluster. I fabricated a bracket out of 1/8 inch aluminum so I could mount it to the bar clamp bolt:
I also used a small relay to give it switched current from the battery:
http://amzn.com/B000CJ05WW
This gives me battery voltage without worrying that the meter will drain it.
http://amzn.com/B00LUMIQJO
This worked out for my GS550L which has no room around the instrument cluster. I fabricated a bracket out of 1/8 inch aluminum so I could mount it to the bar clamp bolt:
I also used a small relay to give it switched current from the battery:
http://amzn.com/B000CJ05WW
This gives me battery voltage without worrying that the meter will drain it.
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