hi i was wondering if any one could tell me if its possible to put an 1800cc zetek coil pack on to my rs 1600i in place of the coils please thnks combiman

 

Yes as that is what you have already!!
The only difference is your twin coils are seperate, a coilpack is just the two in one body, just a jiggle of the wires will sort it.
If you want to keep original look though bike coils can be used.
tabetha