Assuming you have a decent battery (have it load-tested if you are in-doubt) then I'd clean all grounds in the starting system, and to the engine case by the oil filler, shiny-bright, and with a dollop of dielectric grease to forestall any future corrosion.
The 'crimp fix' is a no-cost way to improve your electrical system, a bit of solder on a brass crimped sleeve buried in the wire harness under the seat. Be sure to re-wrap the exposed wires sufficiently.
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You also have an 'early' regulator/rectifier, if you need to replace it, a MOSFET type is a better replacement. Don't buy some no-name off ebay, buy a good name brand one. Replacement will probably entail a bit of rewiring, but they are going to provide you with better electrical function, and the job is not very-involved. Another good one to search-for threads on the subject.
If you have a 'can-of rocks' sound upon initial start-up, that is a good one to tackle ASAP. The usual fix is a new starter clutch, and pulling the flywheel can be a daunting debacle without the proper tool. Early bikes have a 2-pole starter motor, later bikes have a 4-pole starter motor, the 4-pole is a good upgrade, and fits directly where the 2-pole did.
