New Wossner Forged Big Pistons. Straight rebore of the GPZ1100 cylinder. Wossner are renowned for Quality and Performance under the most extreme conditions. See our other listings for more Wossner Piston applications. The item "Wossner Kawasaki GPZ1100 Unitrak 1170cc Big Bore Piston Kit" is in sale since Thursday, September 7, 2017.This item is in the category "Vehicle Parts & Accessories\Motorcycle Parts\Engines & Engine Parts\Pistons, Rings & Pistons Kits". The seller is "suzukiperformanceltd" and is located in Wisbech. This item can be shipped worldwide.