Product Description Specifications Sportster Conversion 883 to 1200, Compression: 10:1, Displacement: 1200cc, Bore: 3.508"/+.010, Stroke: 3.812", Reverse Dome, -8.5cc CARB: This product is not CARB Legal and not for sale in California Category: Engine Components>Piston Sets - Powersports Core: N LTL: N MPN: K0213P1 Proposition 65: N Special Order: Y Clearance Item: N