So am I nuts to consider riding a honda helix cn250 or my honda elite 250 on a trips throught north america and down into south America?

I ride an 86 honda elite 250 cc scooter that I would have to drop a somewhere between 500 to 1000 canadain to fix to the point I would trust it. I would have to do the cb350 shock mod, take the engine out and let someone rebuild it. it's more a sit up scooter whom does the highway speeds. The problem is some spare are only on ebay from china for ch250 engine. Eg the cam shaft. Other like brake drums are just used off ebay. No one is making them that I know of. Love my bike and I know someone has taken one on a 35K world tour. This elite has 31 k on it now.
Now to the helix cn250. Strange as it seems 3 years after the last one left the factory there a 100 to 200 still sitting in the show rooms here in the usa.
3 grand buys you one with unlimbed mileage factory warranty. You can find helix from 86 to 2005 with under 10 K for 1500 to 2500. The engine is cloned so no matter what or where you can find something that works. 24 years of production.

So am I nuts to think a helix can do s. america?? thanks for you input. I m leaving next march 15/11.

parts might be hard to get.......
and they aren't very handy on ripio "gravel"