Note: some of these techniques, regarding lighting, may
not be street legal. Consult local regulations. Switch to LED
tail light; about 10- 15W saved per taillight bulb. Switch to HID
headlight. Expensive, but frees up 20W per headlamp. Do not
use a rheostat (variable resistor), series or dropping resistor to
control your heated clothing to less than full power. These
units waste most of the extra power. use a bimetallic strip
thermostat, or better, a switching electronic
thermostat. These units are much more efficient. On
systems with dual headlights that each have both hi/lo beam,
disconnect one of the bulbs. 55W saved.
LED brake lights and turn signals help too, but they are not as
important because they aren't on for long. Additionally, most
LED turn-signals don't save any power at all, since they are
designed to draw the same as an incandescent bulb, because
mechanical flashers depend on a certain amount of current through
the bulbs to flash. You can now buy electronic flasher units
at auto parts stores. Get the kind that accepts a variable
number of lights. This means they do not depend on a certain
current to work properly. This kind of flasher works with LED
signal lights that do not have a shunt resistor, allowing you to
save that power.
Clean and tighten connections to the main fuse, regulator,
rectifier, generator/alternator, battery, ignition key
switch. Coat with dielectric grease. This eliminates
power losses in the charging system. Run at higher revs in
town. Not graceful, but gets the job done in a pinch. Get a
heavy-duty stator. There are manufacturers that make
specially-wound stators for higher capacity. You will need to
buy a heavier regulator and rectifier, as well.