For next winter, I'm planning new heated grips and perhaps new handlebars for my 2007 Vee. It would be easiest to install heated grips on new bars, and I'm not in love with the stock bars anyway. Aluminum handlebars have some benefits, but apparently there is a problem with heated grips on aluminum handlebars.
The problem is that aluminum conducts heat much better than steel. The handlebars act as a heat sink, especially on the left grip, as it is in direct contact with the bar.
Some manufacturers simply state that their heated grips are not to be used with aluminum handlebars, due to unsatisfactory results:
Model Ergo1-520-750 - kit - for 7/8" Handlebars
Hotgrips also state that stuffing insulation inside the bars will not fix the issue. That seems reasonable. Doing so wouldn't stop the bars acting as a heat sink.
Surely a fix does exist? Have other heated grip manufactureres addressed the issue? All the threads I found that mentioned the problem are at least a few years old, but nobody seems to have a solution.
Has anyone tried heat-reflective, metal foil tape under the grips? I'm not sure that would work, for a number of reasons. Chiefly, it's that the primary thing we're trying to stop is heat conduction, where foil tape is really only effective against radiation.
I have read about using dish soap as an alternative to grip adhesive. Supposedly the soap, plus a little water, makes an excellent lubricant when installing the grips. Then when it dries, acts enough like glue to do the job. If you ever want to remove the grips, force some water in there and the soap again acts as a lubricant (supposedly, rain won't cause the soap to re-activate by itself).
Not sure what handlebars I'm going to get, though adding some rise and reducing sweepback would not hurt. For the grips, I'll probably get Oxford Heaterz Adventure.