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....
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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