Wiseco 4171M07500 Piston Kit for Honda XL250 / XR250 Models - 75.00mm Bore

Wiseco Performance Piston Kit | 75.00mm (+1.00mm Oversize) | MPN: 4171M07500

Up for sale is a premium, brand-new Wiseco Forged Piston Kit (Part Number: 4171M07500). Precision-engineered and forged in the USA from aerospace alloy, this high-performance kit features a race-proven design chosen by top race teams.

Designed for 4-stroke applications, it features a race-ready dome finish with smooth edges to improve combustion flow, horizontal slot-pin oiling to reduce friction and prevent scuffing, and a pressure-seal groove for maximum ring seal. It includes everything you need to complete your top-end repair right the first time.

⚙️ Product Specifications & Dimensions

• Brand: Wiseco

• Manufacturer Part Number (MPN): 4171M07500 / 41710M07500

• Standard Bore: 74.00mm

• Actual Bore size: 75.00mm

• Oversize: +1.00mm

• Displacement: 252cc

• Stroke: 57.80mm

• Compression Ratio: 10:1

• Engine Type: 4-Stroke

• Country of Manufacture: United States

• Condition: New in box

📦 What's Included

• (1) Wiseco Forged Aluminum Piston

• (1) High-Performance Ring Kit

• (1) Alloy Wrist Pin & Retaining Clips

🏍️ Exact Vehicle Fitment

This piston kit fits the following vintage Honda models:

• 1982–1987 Honda XL250R

• 1979–1983 Honda XL250S

• 1981–1983 Honda XR250R

• 1979–1980 Honda XR250

Fitment Note: This is a 75.00mm (+1.00mm oversize) piston. Machining/boring of your factory cylinder block will be required to achieve proper running clearances. Please verify your machinist's specs before ordering.

🚀 Shipping & Returns

• Free Shipping: Free standard shipping applies strictly to the lower 48 states in the United States.

• Exclusions: We do not ship this item to Alaska, Hawaii, Puerto Rico, Guam, or US Territories.