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I have a good condition 1004 or 1000 top end,,,cylinders started life as zrt800 bored to and renickled to 81mm...top end is ported,and will come complete with 3 good zr700 pistons&rings,&needle bearings,spacer plate..bolt this on any t-cat900 or zrt800 bottom end and have a 1004..or use cylinders on a 1000 bottom end..600$ firm