I might be wrong, but in my advice brake cleaner should be your first choice.....
I personally used gasoline for the rough part but may be it's not the best with rubber parts.....
Our experts here will certainly have better advice....
I'm testing my answer here......
1976 cb750 k6 (rebuilding)
1972 cb750 k2 (project)
1986 kawa ex500
1987 shadow 1100
2005 suzuki katana750
2008 klr650
2009 pair of adidas
Québec