I still don't understand what y'all see in friction drive. I bet y'all go through tires like crazy LOL
I have some fab skill, but I went friction drive for a few reasons.
The biggie was ability to do a rolling restart. Couldn't see a way to integrate that into chain drive. I wanted to be able to power to the bike trail, kill it, ride thru, and restart without stopping. I still need that crank time, riding is fun, but no engines for the parks and the yearly urban street rides.
The second was being able to remove it from one bike and put it on another. That one not as important anymore, it's where its gonna stay.
The third was simplicity, but I screwed the pooch on that one. But, I traded simplicity for a cool look and a bigger drive roller with swappable sprockets.
See the buzzbike thread.
I am doing a shifter chain-drive long wheelbase recumbent for my next one. That'll fill my stable with a fatbike, a recumbent, and another motorized pair.
Sit up or kick back, power or not, I'll have it covered.