Re: Hi, I'm planning a huge adventure, please help!
I can't recommend an engine for you, but invest in good tires and tubes. If you can, try to get your hands on a small bike trailer. We got one through Craig's List for $30, took the old nylon shell and kid's sling seat off and put a plywood deck on it. Then you'll be able to carry a larger gas can, oil, spare tubes, small tent, or whatever without loading it all over your bike.
Any day that starts with a good ride is already a better day, and a bad day riding still beats a good day working.
My Builds: My Beast
, Harley59's bike
, my Cruiser