1985 - 1987 GSXR-750 Starter cover: #11351-27A01
1988 - 1992 GSXR-750 Starter cover: #11351-17C00

1992 GSXR-1100 Starter cover: #11351-40C00

Diff part numbers - still may swap though who knows. It is the same part number as the GSX600F 1996 and no doubt other years with the 600/750 lump the oil boilers are like lego for parts most of the time (pretty sure the 85-87 750 cover would fit too).

#11351-27A01 is also used on the 1st gen 1100's so the actual dimensions of the cover don't change between the two engine sizes, and visually checking the fiches they seem very much the same.