More it's a Honda world surely? It's a Nissin caliper isn't it? Not an expert on the. . I'm going to say 'newer ones' cause I'm in a 2007 timewarp
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I'd research CR250 piston sizes and measure yours.
As an aside the sliding pins wear and replacement can be bought from, heck I think I just chose an RM with Nissin and ordere might have had to trim it. The pad pins also get grooves but again easy replacement aftermarket for Nissin from something else.