JE Pistons Ring Sets 1.2-1.5-2mm-3.740

JE Pistons offers this piston ring set, designed to maximize horsepower by precisely sealing combustion pressure. This set features a 0.0472 inch carbon steel chrome top ring, a 0.0591 inch iron phosphate second ring, and a 0.0787 inch carbon steel chrome low tension oil ring, all designed for a 3.740 inch bore. These rings are well-built for a range of applications, from street use to racing, and are available with custom services like back cutting and PVD coating, similar to what top professional racing teams use.

The materials used, like the carbon steel chrome and iron phosphate, are chosen for durability and performance. The precision lapping and multiple ring face styles contribute to reduced friction and an improved ring seal, which can lead to noticeable gains in power and durability. These are file-fit rings, meaning you'll need to gap them to your specific cylinder bore, a common practice for performance builds to ensure the best possible seal.

This set is a solid option for rebuilding the engine in a variety of Yamaha WR and YZF models from the early 2000s through the late 2010s. Remember that these rings are not CARB approved and cannot be shipped to California.