I've been doing some searching, and cannot find anyone who makes or made a 265 stroker kit for a 1995 yz 250. When I bought my bike I was told that It had a stroker kit, and it does indeed have a 4mm spacer plate under the jug, when you do the math it comes out to right around 264cc. I have no idea wheather or not the bore has been increased. the only stroker's I've commonly found have been accompanied by big bores to bring the total to 315cc. I'd just kinda like to know exactly how big the motor is.