I am using 7 speed Suntour Accushift barcons with a Suntour AR RD and a Shimano HG 7 speed 14-34 freewheel. It indexes with well but will not go into the small 14 tooth cog.
I wonder if a different Suntour RD would work better?
__________________
1973 Schwinn Super Sport
1986 Schwinn Peloton
1976 Raleigh Super Course Mk II(for wife)
1983 Gitane Super Corsa
1991 Trek 750 Multitrack