OEM Grade Piston Kit Size A Compatible with Honda CR250R 2002-2004 249cc Liquid-Cooled 2-Stroke Single-Cylinder Motocross 66.34mm Standard Bore Off-Road Dirt Bike 13102-KSK-670

APPLICATIONS:
Honda CR250R Motocross Motorcycle (2002-2004):
• CR250R (2002)
• CR250R (2003)
• CR250R (2004)
• Engine: 249cc Liquid-Cooled Single-Cylinder 2-Stroke
• Bore x Stroke: 66.4mm x 72.0mm
• Location: Top End / Cylinder Assembly
• Component: Piston Kit Size A (Standard Bore, 66.34mm)

REPLACES PART NUMBERS:
• Honda 13102-KSK-670 (Size B Reference)
• Pro-X 01.1323.A (Size A)

SPECIFICATIONS:
• Type: Piston Kit Size A (Standard Bore)
• Piston Size: 66.34mm (Size A for Standard 66.4mm Bore)
• Bore x Stroke: 66.4mm x 72.0mm
• Displacement: 249cc
• Kit Includes: Piston, Rings, Wrist Pin, Circlips
• Material: Cast Aluminum Alloy Piston
• Engine: 249cc Liquid-Cooled Single-Cylinder 2-Stroke
• Fitment: Direct Drop-In Replacement

PRODUCT DETAILS:
This piston kit is a direct replacement for the Honda CR250R motocross motorcycle with the 249cc liquid-cooled single-cylinder 2-stroke engine produced from 2002 through 2004. The 66.34mm Size A piston is designed for the standard 66.4mm cylinder bore providing factory-specified piston-to-wall clearance for optimal ring seal and 2-stroke compression in the CR250R motocross machine. Each kit includes cast aluminum alloy piston, precision-fitted piston rings, hardened wrist pin, and retaining circlips for all 2002-2004 Honda CR250R applications. Manufactured using low-expansion piston alloy and precision machined on CNC equipment for consistent dimensions and reliable performance in the Honda 249cc liquid-cooled 2-stroke engine. The 2002-2004 CR250R represents the final generation of Honda's iconic CR250R two-stroke motocross motorcycle with refined power delivery and handling. Installs directly into the standard 66.4mm cylinder bore without modifications for piston replacement or top-end rebuild on the Honda CR250R motocross motorcycle.