The LA SLEEVE Big Bore Cylinder Kit is a precision‑engineered cylinder sleeve designed for 2‑stroke, liquid‑cooled off‑road engines. Constructed from a high‑strength chrome‑moly alloy, the sleeve expands the bore to 67.00 mm and raises the displacement to 249 cc, delivering the additional volume required for competitive performance on the Suzuki RMX250 platform. Each kit is supplied as a single unit, ready for installation after the original cylinder—whether alloy‑chrome plated, Nikasil, or electro‑fused—is properly bored to the specified dimensions.
Installation of the sleeve requires the cylinder to be machined to the new bore size, after which the chrome‑moly sleeve provides a durable, wear‑resistant surface that maintains tight tolerances under the high‑temperature conditions of off‑road riding. The kit’s design integrates seamlessly with existing pistons and top‑end components, offering a reliable upgrade path for riders seeking increased power and longevity from their 2‑stroke powerplants.