Originally Posted by Nougat
I'm stealing this for my sig.
Glad I could help out...
But now that I am thinking about a chainsaw bike might be the best answer for longterm reliability. Here is my twisted logic:
If you get an "production" level chainsaw, the motor on it is designed to run all day. Logger's keep a spare saw, but a tuned and sharpened saw runs all day 8+ hours. Then it gets up and does it again the next day. If you did the direct friction drive to the wheel you eliminate the gear box which simplifies things and one less thing to go wrong. If you break down, no specialty parts needed, chainsaw can be repaired at any small engine shop with readily available off the shelf stuff, and the bike can be repaired at any bike shop. And a Chainsaw does not add a lot of weight so if you have to peddle, it won't kill you. Just a thought.