Forged piston kit set of four featuring a 74.00 mm (+2.00 mm) oversize bore, engineered to increase displacement and compression while maintaining structural integrity and stable operation under high thermal and mechanical load. Manufactured in Germany, the design promotes efficient heat transfer and balanced expansion for consistent performance.

Features

• Forged piston design for exceptional durability and performance


• Optimised combustion chamber heat transfer to cylinder walls


• Elliptical shape ensures even expansion and load distribution


• Prevents piston collapse by minimising localised thermal stress


• Manufactured in Germany

Specifications

• Bore: 74.00 mm (+2.00 mm oversize)


• Displacement: 1134 cm³


• Stroke: 44.7 mm


• Clearance: 0.06 mm


• Compression ratio (Wössner): 11.70:1


• OEM compression ratio (reference): 10.90:1


• Dome volume: +5.70 cm³


• Compression height: 23.80 mm


• Quantity: Set of four pistons

Cross-Reference OEM Part Numbers

• Wössner piston code: K8838D200-4


• Part number: 56-W9889.200.WO


• Clip: CW18


• Piston pin: WP054


• Ring set: 740XDS

Vehicle Fitments

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  Suzuki GSX1100E 1980–1983