I have a question for the electrical gurus. I have a 1994 ST1100 with, I assume a 28 amp alternator. I run 35W HID lights, a GPS, cruise control and a spare 12V socket (charge phone or similar). I am going to fit a set of Oxford heated grips and maybe spotlights at a later stage. Will I need to upgrade to a 40 amp alternator? Looks like it is a complicated procedure.