This is a new aftermarket replacement for the CBR750 R F RC27 Igniter (CDI) which has been discontinued by Honda.
The original ignition unit may have been stamped with one of these numbers:
This unit will plug right into your existing wire harness. It may require custom mounting.
This unit has some improvements over the stock unit:
1988-1990 Honda CBR750 CDI1988-1990 Honda CBR750 RC27 CDI1988-1990 Honda CBR750F CDI1988-1990 Honda CBR750 Hurricane CDI1988-1990 Honda CBR750 Superaero CDI