Sleeve was hard, but i got it out. But then it was extra hard to get it back in. After some efforts, i found that it needs to be perfectly aligned to get it back in without pushing it hard.

So i think i will wait till it's fully broken in till i give it a thorough cleaning.

Sorry guys it's my first Go Engine. My previous motor was an O.S. V-Spec whose sleeve and piston was a piece of cake to get them out.