The rubber dampers are probably worn out and causing the sprocket to fit loose and move around alot. Once you get the axle you you'll see how it fits together, and they are still available new from honda. There was a guy reproducing the front number plates, cant remember who though. The aftermarket parts for these is really good and can find almost anything new from honda or from a company. I have had really good luck with gordon spangler at Hondaatc70.com.
Trikes Owned:
1983 Honda 200x - Durablue Axle
1986 Honda 250r - +2 westcoast
1984 Honda ATC 70 - Piranha 140 swap
1983 Honda 200e - Stepdads