PROX 66.4mm PISTON KIT B, BETA RR250 Enduro 13-21, XTRAINER 250 18-21

ProX Piston � 2-ring Piston 66.40 (B. 66.35mm)

Ready to install, ProX Piston Kits are supplied complete with piston rings, wrist pin, and circlips. - ProX pistons are precision machined on the latest, state of the art CNC equipment and use the same low-expansion, low-friction piston alloy all major Japanese engine manufacturers use. - Uses an OEM style tin coating to assist the break-in process when you first start your machine.

Beta
250RR Enduro 2T 2013 - 2021,
Xtrainer 250 2018 - 2021.
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PROX 01.7313.B