Check this out,My brat had no oil pressure,checked gauge by grounding wire,gauge worked,Bought a new sending unit,still no pressure,removed oil pump,installed another (used) still no pressure.Removed oil pan found bearing fragments in oil pan.Gave up Found another EA81 with 60+ oil pressure.Install in my brat.Still no oil pressure.Does the gauge work like a resister?
If so this explains it.If not I need some advice.This is my first Brat.
Thanks Glenn