@FJDif it is a gs1000 8v? Block it will give you roughly 1240cc @ 78mm. Imo it’s on the limit and will have very thin liners. I considered doing this but for my road bike I went with 76mm Kawasaki Pistons from Mtc. Even using gs1100efe liners I had to hand relieve the crank cases. Using any liner that is bigger on the od than a efe liner makes the block very weak and will window out into fresh air between the cylinders, with that you get oil leaks and a very unstable block with which ring life will suffer.