azblackbird,
I purchased a Rokon back in 81 when they had models in ten colors, yellow, yellow, etc. I bought it with the hollow rims and indeed the entire bike would float, even tested that out ONCE! The original Chrysler marine engine was a bit soft on the horsepower though the bike would go places that were hard to walk on IF I could have stayed on the machine. It would indeed climb over a 3' vertical wall and would climb up a power pole till of course the back tire tried to leave the ground. A truly amazing machine and with the 175 CC engine it should really work well. The hint here is to always carry at least two (2 minimum) drive belts with you as when that belt gets cut in half the fun is all over ifn a person does not have a spare!
Interesting thread, as soon as I finish up this job I might just give it a try!....................63bkpkr