Hi Mick,
There will be someone out there who can help as there are many righthand mounted sidecars in Europe. Watsonian made righthand sidecars so they do fit. I have never been aware of anyone having a problem with the kickstart but if you wanted a two in to one exhaust it may be difficult to get one that goes on the left side of the bike. This photo is part of the line up in Norway 1997 with about 6 righthand sidecars in view. Sorry about the poor quality. It was pre digital.
Dave.