I got a PM about this also, so I figured I'd post here too.
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For removal and installation of the grips, rubbing alcohol and a long, thin screwdriver worked best. Work the screwdriver in under the grips and pour the alcohol down the shaft of it to get it under the grip. You don't need too much, but you might need to run the screwdriver around the handlebar to distribute the alcohol. Once it's in there, the alcohol make a great lubricant and allows you to twist-pull the grips off, or twist-push back on.
The heaters are fairly straight forward and stick right on the handlebars. The wires should be aligned with the other wires from the existing electrical components keeping in mind the throttle on the right. Put the wires in such a way that there is more slack as you twist the throttle so you don't get tangled up.
All of the wires I ran along the existing wires and zip tied them in a couple locations to keep them together. Just follow with what the bike already has direction and slack wise and you should be fine. I put the switch on my dash, but you can decide where it's best for you to reach and where you like the look.
Whenever I install a new electrical item, I always try to follow the bike's existing wires, including to the battery, because I know that heat won't be an issue since Yamaha already put stuff there. It also keep the slack such that it will not impose on the steering.
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Hope this helps. Let me know if there are more question, or if I missed something.