efi is for economy only..
for perfomance this reboring can be done here also. though i wouldnt recommend it.
even the bbk on aliexpress is the same OE 125 cylinder rebored.
reboring gives you thin sleeve walls, if my memory serves me right, at Atlas, the rough bore we used to do on a 125 sleeve gave about 7mm wall thickness, this sleeve was then put in an injection molding machine and aluminum cast over it.
it was then rebored and honed to its final size, which i dont remember, but most probably would have 6mm walls.
so when rebored even bigger, you would end up about 5mm walls or less.
it wouldnt be much long lasting.
