Final and for the record 82 to 84wr cylinder porting specs

The sleeves on these are pretty thin to start with. Mine had the original Piston still in it and when I bought the bike it still had the original tires on it. And when it broke it never seized. It acted like it was running out of Gas wile on the back straight of a Vintage MX race so pulled off and headed to the pits. After finding Gas in the tank I Turned the motor over by hand and locked up
when some of the broken parts wedged between the Crank and the Piston. When I find one of these on e-bay I see quite a few with cracked liners.
Does the late 84 WR Water Cooled Cylinders with there center Exhaust Port follow the same porting rules or are they completely different ?