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Message: [QUOTE="mhardee, post: 461878, member: 35938"] I rode for ten years (10 years ago!) and rode Maicos.. (440 and 490).. back then we'd bore and hone the cylinders for new pistons. Now, I hear about plated cylinders.. with, what I expect to be, less cylinder wear than in the past.. I have just purchased a 2003 KX-500 and wanted to know where to find out what plating is used on it and normal top-end practices.. hone and replace standard piston or if it's wore what do you do about boring? Thannks for helping an old-timer out! [/QUOTE]