TOPIC:

can a 900 go to 1075 without putting in different sleaves?

No...you need a 1000 cylinder block to go to 1075 with stock sleeves. It will bolt on to your 900 motor...not sure if the case bore holes are the same size though...I think they are. Anyone?

1015 is maximum safe bore for stock sleeves,but doesnt leave much there;) you can take stock kz1000 sleeves to 1075 with no problem but youll need to clearance your cases for the bigger sleeves.if you are going to bore a 900 cylinder for bigger sleeves id go with an 1197 kit itll cost about the same money:evil: