I'm all for it, and headed in that direction myself, although I think there are varying degrees of success. Some motorized board-trackers look good from far, like that orange Flying Merkel tribute on Ebay a couple of months ago. It looked good in those tiny pictures, but when you looked at the details it was just a disaster from a design and execution standpoint. I'm sure you've perused the myriad of Youtube vids which detail some pretty amazing builds, many which took months or even a couple years and some pretty intense machining ability, these are the ones that look "right" to me.
Some resources...
AWESOME step-by-step, this one, although thorough, is as simple as it gets:
http://www.youtube.com/watch?v=8Zk-QIZp ... re=related
And then there's this labor of love, truly amazing:
http://boardtracker.blogspot.com/ Take that all in and let it bake your brain.
If you're using Harley Davidsons as reference you NEED to go to your library and check out 'Classic Harley-Davidson, 1903-1941' if for nothing more than the classic color schemes, some really staggering color combos in that book, actually changed my perspective about how bike colors should work together.
Personally, I'm waiting for that 250cc V-twin that's been in the works for a while to become commercially available.