WOSSNER 54.2mm FORGED PISTON KIT B, KTM 125 1987-1993

Wossner forged piston kit 8011DB is a 54.20mm (+0.01 oversize) piston designed specifically for KTM 125cc two-stroke models from 1987 to 1993. This piston is engineered for high performance and durability, offering optimised heat transfer from the combustion chamber to the cylinder walls. The elliptical design ensures uniform bearing surface distribution under thermal expansion, reducing the risk of piston collapse and improving overall engine efficiency.

Features

• Forged piston design for increased strength and durability

• Optimised heat transfer from combustion chamber to cylinder walls

• Elliptical shape for uniform load distribution and prevention of localised stress

• Manufactured in Germany for high-quality standards

Specifications

• Display (cm³): 125

• Bore size: 54.20mm (+0.01 oversize)

• Stroke (mm): 54.10

• Piston-to-wall clearance (mm): 0.06

• Compression height (mm): 28.00

• Compression ratio: 2-stroke (Wossner and OEM)

Cross-Reference OEM Part Numbers

• Wossner Piston: 8011DB

• Lock: CW15

• Pin: WP032

• Ring Set: RSB5425 x 2

• Internal Reference Part No.: 56-W627.00B.WO

Vehicle Fitments

• 1987 KTM GS 125

• 1987 KTM MX 125

• 1988 KTM GS 125

• 1988 KTM MX 125

• 1989 KTM GS 125

• 1989 KTM MX 125

• 1990 KTM GS 125

• 1990 KTM MX 125

• 1991 KTM GS 125

• 1991 KTM MX 125

• 1992 KTM GS 125

• 1992 KTM MX 125

• 1993 KTM GS 125

• 1993 KTM MX 125

Majority of our listings are for a direct replacement for your original part.

Our parts are made of quality and are designed to meet or exceed the original OEM Standards.

Our products are often a cost effective alternative to genuine OEM Parts.

Please note: the models of bike we state in our listings are for general guidance only. Please make sure this item will fit your bike before purchasing. Also, we cannot guarantee fitment to any non-UK models.