Pro-X Racing Piston Kit (B-Size – 48.46mm) 01.4124.B

Pro-X Racing Piston Kit (B-Size – 48.46mm)

Part Number: 01.4124.B

Keep your Kawasaki KX85 performing at its peak with a high-grade ProX Racing Piston Kit. Precision CNC-machined to exact OEM tolerances, ProX pistons feature low-expansion, low-friction aluminum alloys supplied by the same original equipment manufacturers used in Japanese motocross engines.

Key Features:

• B-Size Precision Fitment: Specially sized at 48.46mm (+0.01mm over standard "A" bore) to restore exact clearances and tight compression in slightly worn or broken-in cylinder bores.

• Advanced Skirt Coating: Features a specialized low-friction skirt coating designed to assist during critical break-in periods, reducing friction and minimizing engine wear.

• OEM-Grade Casting Alloy: Formulated with high-silicon aluminum alloy to maintain structural integrity and limit thermal expansion under high-RPM racing conditions.

• Nicasil Cylinder Compatible: Engineered specifically to work seamlessly with modern Nicasil-plated cylinder bores.

What’s Included:

• (1) ProX 48.46mm Piston ("B" Size)

• (1) Complete Set of Premium Piston Rings

• (1) Wrist Pin & Circlips

Fitment:

• 2014–2023 Kawasaki KX85

⚠️ Sizing & Installation Notice:

This kit is a "B" Size (48.46mm) piston kit. Always measure your cylinder bore accurately with a micrometer or bore gauge prior to installation to confirm proper piston-to-wall clearance and select the appropriate piston letter size ("A", "B", "C", etc.).