This is a NEW MTC Engineering 73mm big bore kit for all GS1000 models.This kit is exclusive to Suzuki Performance Spares. The usual Wiseco kit, although nominally 10.25:1, when fitted, usually yields in the region of 9.4:1 cr, not much more than standard. For performance and race applications this kit is the answer. Kit consists of 4 forged pistons, rings, circlips and NEW gudgeon pins, PLUS the oversize head gasket. This kit is a straight rebore of your standard barrels.   We can supply Wiseco kits and spares for most applications. See our other listings for more parts