PISTON KIT A 54.00 HONDA NSR125 KY4, VERTEX 21972A
Vertex UK Piston Kit 21972A. All Vertex Pistons Feature: Standard pistons and components are OEM replacements. Kits include piston, rings, wrist pin and circlips. All pistons are heat treated with a T-5 or T-6 hardening and tempering cycle. Replacement rings are sold individually. Made in Italy. Fitted in many OEM bikes as STD. SPECIFICATION: BORE SIZE. 54.00mm [A 53.96mm]. Replacement Parts: Rings. 55910005400 Need 2, Pin. 715061, Clips. 72055. Cross reference numbers ONLY. JC20, JC22, KBS 13103-KY4-901.
- SKU
- 56-W906+00A.VERTEX
- Brand
- Vertex
- Availability
- In Stock (1)
FULL DESCRIPTION
Vertex Piston Kit A 54.00mm
This Vertex Piston Kit is designed for high-performance engine applications. Vertex pistons are manufactured in Italy and feature robust construction for reliability and durability. Many OEM bikes are fitted with Vertex pistons as standard equipment, attesting to their quality and performance.
Key Features:
- OEM Replacement Standard: Components meet original equipment specifications for a precise fit.
- Complete Kit: Includes piston, rings, wrist pin, and circlips for a full replacement solution.
- Heat Treated: All pistons undergo a T-5 or T-6 hardening and tempering cycle for enhanced strength.
- Made in Italy: Ensuring high manufacturing standards and quality craftsmanship.
- Bore Size: 54.00mm (with a specified piston clearance of 53.96mm).
Replacement parts, including rings, pins, and clips, are available individually to maintain your engine's performance.


