Rob, I am not sure where you are but in europe you can find parts, try looking for the parts under the name of AERMANCCHI MOTOR CYCLES or CAGIVA as HD bought out aermancchi in 1965 and carried on making them under HD until 1978 when they sold it to cagiva. There is also some specialist workshops in the USA who race these things, maybe they can help you.(I bought some new parts from a fellow in france Aix -en- provence but sorry I donĀ“t have his name any more but I found his name on the net - google!!) Hope this will help you !!! Nieto.