help with customizing xv 1600

HI !
I read this forum site for a few months. I dont speak german , so I use google translator and read ,but slowly.
So what is my next problem ,I am owner of wild star ,and want to do some custom works .
My plan is stop at start with choosing the weels and tyres , plan is to set on front wheel hub rear rim 150,wider rear schwinge and fater rim 200 is Ok ,in the mather of fact I want some old school look ,but problem is ---- did I need lovered bike about tyres because i meen to use front 150/60 16 ( THIS IS original rear weel ) and for rear weel i plan to use 16 zool rim and i meen to fit with 200/80 16 , i know i must do a streching of rear schwinge and the all that stuff . but I am in worry if I put this dimenzion of tyers did bike still have bouth side at same height,I want to have same < of fork like standard , and want to have same radius of wheels 16 " on front and rear ,
so please can somebody tell me is this OK , or what dimenzions of tyres I need.
PLEASE FOR HELP
( sorry but write on english if is posibile)

HI from CROATIA

TNX !

Well I do maths and I finaly know ,I put 150/80-16 for front and 200/60-16 on the back .
so thank you very much,see you

after few matematics- finaly 200/70-15 on rear end

tnx again