YAMAHA YZ 250 X [2016-2027] - cast pistons

PROX cast piston for the YAMAHA YZ 250 X

The PROX cast piston is designed for the YAMAHA YZ 250 X from the 2016-2027 model year range. As a cast aluminum piston, it is suitable for replacement in equivalent original equipment quality and is tailored to a 2T engine.

Function and execution

The patented surface treatment supports reduced friction in the cylinder. The piston shape is designed as a curved piston and has a lamella cutout and a suction hole. A MoS2 skirt coating complements the design in the piston skirt area.

Technical data

• Brand: PROX
• Piston Type: Cast
• Material: aluminum
• Piston compression: standard
• Diameter Ø: 66.35 mm
• Letter oversize: A
• Oversize: STD
• Stroke: 2T

Vehicle assignment

The cast piston fits the YAMAHA YZ 250 X in the full year range 2016-2027. This assignment is used to select the appropriate piston for this model and period.

Factual selection aid

The combination of cast design, standard piston compression and the diameter of 66.35 mm supports targeted selection based on the existing engine data. The special piston shape and the MoS2 skirt coating must be taken into account when tuning and replacing.