As an ex-farmer of many years, with lots of experience with ag bikes, don't write off the Suzuki DF200 Trojan or any other ag bike. I have long thought all the ag bikes would make great robust tourers, and I know that they are are very reliable. Farmers get together and talk, over the boundry fence, and in town, and any bikes that wasn't up to the job would very quickly get a bad name. Ag bikes get used like no other bikes, except maybe RTW bikes, every day and in all sorts weather, and terrain. It's not unusual for an ag bike to be used seven days a week, and for hours every day. I think it's a great idea. Good luck and let us know how your trip goes.
Nigel in NZ
The mouth of a perfectly contented man is filled with .
-- 2200 BC Egyptian inscription