VintCo KTH21-0.5 is a top end piston kit for 1981-1984 Honda ATC250R models, supplied as a complete rebuild package for a 70.5 mm bore with a +0.5 mm oversize piston. It includes the piston assembly, top end bearing, and a full top-end gasket set, and is manufactured using modern materials and production methods for OEM-comparable fitment and performance. OEM cross-reference part numbers are provided for fitment verification, and other size options are also available.

Features

• Complete top-end rebuild kit
• Includes piston, rings, pin and clips
• Includes top end bearing / wrist pin bearing
• Includes full top-end gasket kit
• Includes head gasket
• Includes base gasket
• Includes intake gaskets
• Includes exhaust pipe gasket
• Coated piston to aid running-in
• OEM cross-reference numbers supplied for fitment verification
• Kit price offers a 10% saving compared with purchasing the components individually
• Additional size options are available

Specifications

• VintCo Part Number: KTH21-0.5
• Product type: Top end piston kit
• Nominal size: 70.5 mm
• Piston diameter: 70.44 mm
• Oversize: +0.5 mm
• Piston clearance: 0.06 mm
• Piston construction: Forged
• Piston coating: MOS2
• Country of manufacture: Germany

Cross-Reference OEM Part Numbers

• Head gasket: 12254-961-010
• Base gasket: 12191-961-306
• Intake gasket: 14132-KAE-000
• Intake gasket: 14133-430-306
• Exhaust pipe gasket: 18291-961-306

Vehicle Fitments

• 1981 Honda ATC250R
• 1982 Honda ATC250R
• 1983 Honda ATC250R
• 1984 Honda ATC250R