I´m wanting to know if anyone could tell me if it is possible to change my original 5-speed rf900 box with the 1992 gsxr 750 wn 6-speed box, if that conversion won´t work which 6-speed box would be appropriate. If possible I would also like to know if I could take the cams from the 750 and put them into my original motor. If someone can please help me it will be highly appreciated.