This VintCo piston kit is designed for 1976-1981 KTM 390 models and is intended for vintage 2-stroke engine rebuilding. Manufactured using modern materials and production methods for OEM-style fitment and performance, the kit includes the piston, rings, pin and clips. It is listed as an 83.0 mm piston kit with 1.0 mm oversize, while the source description also references 83 mm (+0.5 mm over). A wrist pin bearing is available separately, and OEM part numbers are referenced for fitment confirmation.

Features

• Complete piston kit for vintage 2-stroke KTM 390 models
• Includes piston, rings, pin and clips
• Wrist pin bearing available separately
• Intended for engine rebuild and replacement use

Specifications

• VintCo Part Number: PST04-1.0
• Piston size: 83.0 mm
• Oversize: 1.0 mm
• Source description reference: 83 mm (+0.5 mm over)
• Clearance size: 82.90 mm
• Clearance: 0.10 mm
• Piston construction: Forged
• Coating: MOS2
• Made in Germany

Vehicle Fitments

• 1976 KTM 390
• 1977 KTM 390
• 1978 KTM 390
• 1979 KTM 390
• 1980 KTM 390
• 1981 KTM 390