sprocket size for swing arm swap

getting ready to swap a zrx 1100 swinger on my kz750. m looking for suggestions on sprocket sizes. if i run a 19t offset in the front to help with clearance issues, what size should i go in the rear? ill be order my front sprocket from PBI . anything helps guys. thanks

Have fun.
www.gearingcommander.com/

I take it you will be using the smaller 17" ZRX wheel too ?
To work out the equivalent of your current gearing you simply need to do the following.
1 - Measure the circumference of your existing 18" wheel/tyre and divide that figure by the number of teeth on your current back sprocket to get distance travelled per tooth.
2 - Measure the circumference of the 17" ZRX wheel/tyre and divide that result by the distance travelled figure you got In step one to give the amount of back sprocket teeth needed to give the same gearing as you had with the 18" wheel ( At this point you will most likely end up with a fraction of a tooth in the result so you will need to round up or down to get a whole number)
3 - You can now work out your new equivalent final drive ratio using the original front sprocket tooth count and the new rear tooth count and apply that to your larger front sprocket to get the rear sprocket size needed .