
PROX Forged Piston designed for engine restoration of motocross and enduro machines. This aluminum piston, with a "flat with hollow" finish, matches the original specifications for a refurbishment equivalent to the first fit. It is suitable for boring work requiring an oversize A and integrates into the original combustion chambers with standard compression.
Ideal for engine refurbishment operations on modern trails and motocross, this piston meets common machining dimensions. Be sure to check compatibility with the sleeve and rings during reassembly. Examples of compatible models: BETA RR 430 4T RACING (2024), BETA RR 430 4T (2024), and BETA RR 430 4T ENDURO RACING (2019).