Yamaha XT225
Howdy, first post here. I am an avid motorcycle rider and have traveled to Panama and back in a 89 Toyota single cab. I currently have a street legal XR400, which is plenty powerful, air cooled and virtually bullet-proof. Parts are readily available in Central America, but be aware that most US model bikes are somewhat hard to find parts for internationally, as most manufacturers produce completely different bikes for the US market.
I highly recommend going Japanese. The bike I am going to buy to put on the back of my 92 Dodge diesel 4x4 is a Yamaha XT 225. I have ridden side by side with my buddy who has one. It has 6 speeds (with a stock, super low granny gear that you can walk beside the bike at idle with!) 6th gear allows you to cruise at highway speeds, no problem. The bike sits really low, which is awesome for single track and traffic maneuvers. It is electric start(can mount a kick too), and just performs superbly.
Sorry for all the TW owners out there, but those big tires just are not that cool for a motorcycle. They slow you down and cause more trouble than they get you out of. Hands down, the XT225 would be the best bang for your buck....and under 250lbs. You can get one for under $2500.:bike_rider: