Stroke: 90.3Displacement: 2792 ccmWossner Comp. Ratio: 8.5:1 OE Comp. Ratio: 10.75:1Piston Weight(grams ): 336 note: price includes rings, wrist pins, clips and low friction skirt coatingââBore Sizes: 81.00 - Kit Part No. K9097DA, 81.50 - Kit Part No. K9097D050, 82.00 - Kit Part No. K9097D100