starting a rebuild of my 3k i recently purchased. the pistons that came out say +1.0mm on top, after checking with vernier calipers the size is 75.5 mm or 2.972 inch the bore was 75.7mm or 2.980 inch. the engine ran with kawasaki quad carbs from an old z900. finding it very hard to find replacement pistons,rings ect. the block is a blank 3k with no engine number straight from toyota. any tips or ideas where to start would be great!

There's 60 thou oversize in replacement pistons (1.5mm) so just get a set of those

http://www.precisionintl.com/StockSearch.aspx?Search=3k%20pistons