Zx6r j1 2000 swapz for 125?

Description:

I have a zx6r j1 2000 model
My brother was using it for a few months whilst I was taking my cbt and getting ready for.my full license. Since then I've gain a knee injury so I just cant hold the bike up as I'm small any way.
I'd like to go down to a 125 for the mean time so if you like a bigger bike this is much fun! (I've had a few goes).
Just needs back wheel bearing changing but I have those brand new in the pack, and back brake pads. I have sorn it off road due to my knee etc but I have all the paper work and everything you need.