The first thing I might suggest is starting at one end of the bike and working toward the other checking each and every electrical connection for clean and tight. A dab of dialectric grease will help keep them clean.
I might also suggest getting a set of alternator brushes, points, and a new battery.
On the battery there are many options. I just put in a Ballistic Batteries 8 cell battery in mine. A bit costly but it works great. It is about half the size of the stock battery, weighs 1.7 lbs and has between 30 and 50 % more cranking power. Depends on what battery you compare it to. The stock size battery depending on maker can have between 180 to 210 CCA's. The 8 cell has 275.
With a stock battery my 750 kitted 75 wouldn't crank very well. Not very fast or very long. The new battery cranks it faster and longer.
Leo