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This Wossner forged piston kit is a standard replacement designed for Harley-Davidson Buell X9BR and X9BS models from 2002 to 2008, including the XB9R Firebolt and XB9S Lightning. Manufactured in Germany, the pistons feature a domed design with a 10:1 compression ratio, providing high strength and excellent thermal management. The kit includes two skirt-coated forged pistons, rings, clips, and pins.
Features
Forged construction for superior strength and reliability
Skirt-coated for reduced friction and wear
Designed for optimal combustion heat transfer to cylinder walls
Elliptical design ensures uniform bearing surface during thermal expansion
Domed piston with 10:1 compression ratio
Manufactured in Germany
Specifications
Bore: 3.501" (Standard)
Compression ratio: 10:1 (domed)
Includes: 2 forged pistons, rings, clips, and pins
Ring Set Part Number: 890XSY
Cross-Reference OEM Part Numbers
56-W9864.000.WO
K8623DA-2
Vehicle Fitments
Harley-Davidson Buell X9BR (2002–2008)
Harley-Davidson Buell X9BS (2002–2008)
Buell XB9R Firebolt
Buell XB9S Lightning