To me it sounds like you need to check and clean the voltage regulator contacts, the regulators are temperature sensitive. The shop manual has a chart of voltage settings based on the temperature of the regulator.


1957 Chevrolet 5700 LCF 283 SM420 2 speed rear, 1955 IH 300U T/A, 1978 Corvette 350 auto, 1978 Yamaha DT175, 1999 Harley Davidson Softail Fat Boy