Wiseco Forged Series Piston Kit with Gaskets - Honda XR250R/XR250L (1986-2004) - 78.00mm Bore (+5.00mm Big Bore) - 4-Stroke

Wiseco Forged Series Piston Kit with Gaskets - Honda XR250R/XR250L - +5.00mm Big Bore

Premium Wiseco Forged Series piston kit with complete gasket set for Honda XR250R and XR250L off-road/dual-sport bikes. This is a BIG BORE KIT (+5.00mm / 78.00mm) - the largest oversize available for this platform!

⚠️ Big Bore Kit - Cylinder Boring Required

This piston is +5.00mm oversize. Cylinder boring to 78.00mm is required for proper fit. Cylinder sleeves must be purchased separately if needed. Professional installation recommended.

Kit Includes

• +5.00mm Oversize Forged Series Piston
• Ring Set
• Wrist Pin
• Circlips
• Complete Gasket Set

Key Features

• Forged Series - premium 2618 aluminum alloy construction
• Maximum big bore kit for maximum displacement increase
• 10.5:1 compression ratio
• Complete top-end gasket kit included
• Dual model fitment - XR250R and XR250L
• 19 years of fitment (1986-2004)!

Ring Style Note

Correct replacement ring style is stamped on the dome of piston. Example: "C" for "XC", "G" for "XG" and "H" for "XH". Wiseco ring types are not interchangeable.

Piston Specifications

• Bore Size: 78.00 mm (+5.00mm Big Bore)
• Piston Diameter: 77.95 mm
• Stroke Length: 59.50 mm
• Compression Ratio: 10.5:1
• Material: 2618 Aluminum Alloy
• Skirt Coating: Non-Coated

Engine Specifications

• Displacement: 250cc (increased from stock)
• Engine Type: 4-Stroke
• Weight: 1.7 lbs

Fitment

• Honda XR250R: 1986-2004
• Honda XR250L: 1991-1996