PISTON KIT ALL 1100RS 101 SET2, WOSSNER K8543D200-2 BMW

This Wossner forged piston kit with a 101mm bore (actual 100.96mm) is designed for BMW 1100 and 1150 series motorcycles, including RS, GS, and S models across all production years. It increases engine displacement to 1129cc, maintaining OEM compression while delivering robust performance and thermal reliability.

Features

• Forged design for superior strength and thermal transfer

• Elliptical profile ensures even pressure distribution under expansion

• Made in Germany to exacting standards

Specifications

• Bore Size: 101mm (actual 100.96mm)

• Stroke: 70.50 mm

• Clearance: 0.04 mm

• Display Displacement: 1085 cm³ (actual 1129cc indicated)

• Wossner Compression Ratio: OEM

• OEM Compression Ratio: 10.70:1

• Dome Volume: +2.30 cm³

• Compression Height: 32.10 mm

• Lock Part Number: C22X1.6

• Pin Part Number: WP009

• Ring Set Part Number: 101XSY

Vehicle Fitments

• BMW 1100RS (All years)

• BMW 1100GS (All years)

• BMW 1100S (All years)

• BMW 1150RS (All years)

• BMW 1150S (All years)