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The JE single piston for the 2021 Kawasaki KX250 Pro Series is sized at 78mm and specified with a 14.1:1 compression ratio, offered as an individual piston for maintenance or rebuilds. Intended to match the listed bore and compression for that Pro Series model, it provides a single‑unit replacement option when servicing one cylinder to preserve the engine’s combustion characteristics.
JE Pistons 2021 Kawasaki KX250 PRO SERIES 78MM/14.1 Piston Single
