PISTON KIT 98-02 KTM380 78.50, WOSSNER 8223D050 FORGED

This Wossner piston kit with a 78.50mm bore (+0.50mm oversize, actual size 78.44mm) is designed for KTM 380 models—EGS, EXC, and SX—from 1998 to 2002. Forged in Germany, the piston delivers robust durability, excellent thermal conductivity, and high-performance reliability for demanding two-stroke applications.

Features

• Forged piston for maximum strength and engine longevity

• Engineered for efficient heat transfer from combustion chamber to cylinder walls

• Elliptical design ensures uniform bearing surface, preventing localised pressure and piston collapse

• German manufacturing guarantees precise fitment and consistent quality

Specifications

• Bore size: 78.50 mm

• Actual piston size: 78.44 mm

• Display (cm³): 368

• Stroke (mm): 77.00

• Clearance (mm): 0.06

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

• Compression height (mm): 27.00

Vehicle Fitments

• 1998–2002 KTM EGS 380

• 1998–2002 KTM EXC 380

• 1998–2002 KTM SX 380

Included Components

• Piston: Wossner PN# 8223D050

• Lock: PN# CW18

• Pin: PN# WP039

• Ring Set: PN# RSC7850