My friend was selling his 1990 model bike for like 5,000 rupees, might try it on that lol.
Safe investment
yeah i believe that a few alterations must be done to the engine and other things to run it, but if it turns out to be more than 50% cheaper than regular petrol, then it is worth all the hard work 
Brazil has a lot of cars than can run on Petrol& Ethanol, must be cheap as f... i guess :d