As the km's sneak towards 13,000 I'm feeling quilty about starting my 85 ns250r mc11.It needs piston,rings,wrist pin and bearing,head and base gaskets.These might be hard to find so does anyone know if mk16 or mk18 pistons will fit.Mine has a 56mm. bore in nikasil.I can hardly wait till I can start to flog it mercilessly again as it was designed for....Lee