Does anybody have experience with putting 17 inch offroad wheels on a 250?

Why I am asking: Recently i had the chance to ride pitbikes on a track and it was a lot of fun.
Now I am having a CQR250 that I used for enduro type riding. I am replacing it now anyway. So I was thinking to strip down all unnecessary stuf and make it a fun bike to use on those mudd fields or not-yet construction sites.
No question, I need knobbies. Now I am thinking to make them 17 inch front + back might make handling easier and bring it a bit closer to the pit bike experience.

Any opinions on that? Can't find anything on full size bikes with smaller knobby tyres.
Don't want to put more money than necessary in it and later find out the bike is too heavy for 17s to be fun or something.