I can vouch for this solid state 10 volt instrument regulator on image link below. It replaces the far less reliable electro-mechanical OE one.

[Linked Image]

Note the bi-metallic strip operation of fuel and temperature gauge used on earlier cars require a regulator to provide a reference 10 volts. They will not work accurately without as battery volts are continually rising and falling during driving. You may even damage the instruments irreparably without.

Just noticed it's the same as TBM linked above. The kit comes with heat conducting paste and a pop rivet to secure to metal surface to keep the semiconductor cool. There are other solid state regulators that fit inside the OE metal casing (for originality?) doubt the heat dissipation is as good though.


Richard

2018 Roadster 3.7
1966 Land Rover S2a 88
2024 Royal Enfield Guerrilla 450
1945 Guzzi Airone