Re Rentals in Brasil...or any other country in South America... Forget about it! I have checked this out & what rentals I could find were ridiculous ripoffs by less than reputable characters. I found a very reputable dealer & many local riding companions in Porto Alegre the southermost state of Rio Grand do Sul Brasil. I purchased a low milage (3,000km) 1998 Honda Strada Street Sport, made in Brasil. I rode this lovely little beast 10,000km in 4 months and could sell it readily for close to what I paid for it 4,000 Brasil Real or$3,450.Canadian dollars. A great little bike, comfortable for highway & fantastic on the street around the cities. Great for off road but limited by the street tires. Only 200cc but it is a machine prefered by the military & police and very reliable.
I am going back to Brasil in November & haul this sweetheart out of storage & hit the road, while my riding budies here in Canada are tuning up the snowblowers. I am a Gold Wing rider in Canada however I found this little Brasilian gem was far better suited to the roads in South America.
Touring in Southern Brasil is well off the tourisim path. Thus prices are far less than tourist areas. I highly recomend it, especially if you can hook up with local riders. DuoAction Suzuki in Porto Alegre has a "Moto Cafe" where members from all the Moto Clubs meet every Wednesday for an evening of "show & tell" plus dinner, planning road trips, and a few Cerveja, if so inclined. A couple of Brit english teachers hang out there, and quite a few locals who are english speaking, businessman types. They were delighted to have the only Canuck ever to visit in their area. They loved to practise their english on me. I was invited to moto meets & BBQs almost every weekend. If anyone cares to visit I have a spare room available from December to April & can help you find a bike, interesting places to visit, maps etc. on a limited budget. Bring a compass or GPS with you as road signs are scarce and often unintelligble.
It is a different culture than Canda for sure, so be prepared to be flexible, open minded, and have fun learning as you go.
BTW Brasilian women are very beautiful & girlwatching is the best!