
PROX Cast Piston (manufacturer ref. 01.4100.A): replacement piston dedicated to motocross machines. Machined from aluminum with a dome-shaped head, this piston offers a precise diameter of Ø 42.95 mm and corresponds to a oversize: A in standard mounting. Designed to restore the piston/cylinder fit on 60 cm³ engines, it retains the necessary dimensions for faithful reassembly.
Compatible with the listed motocross models: Kawasaki KX 60 (KX60B) models 2001, 2002, and 2003. Before installation, check the bore, the allowance to use an oversize A, and the condition of the rings and pin to ensure proper clearance. Installation and clearance check of the piston/ring are recommended by a mechanic or preparer.
Associated spare parts: rings 260064, pin 032015, clips CP1210C, needle cage 400400. This sheet provides the dimensions and references for precise replacement without unverified technical interpretations.