Yamaha YZ 250 (CG 20) [2005] - cast pistons

PROX cast piston for Yamaha YZ 250 from 2005

The PROX cast piston is designed as a replacement piston for the Yamaha YZ 250 (CG 20), built in 2005. Its aluminum design and cast design combine the series-specific piston compression with precise adjustment to the specified piston diameter of 66.35 mm.

Function and execution

The patented surface treatment supports reduced friction in the cylinder. The piston skirt has a MoS2 coating. The curved piston is designed with a lamella cutout and suction hole. This makes the component suitable for replacement with equivalent original equipment manufacturer quality.

Technical data

• Brand: PROX
• Piston type: cast
• Material: aluminum
• Piston compression: standard
• Diameter Ø: 66.35 mm
• Letter oversize: A
• Oversize: STD
• Stroke: 2T
• Specificity: domed piston, fin cutout, suction hole and MoS2 skirt coating

Vehicle assignment

Suitable for the Yamaha YZ 250 (CG 20), built in 2005. The assignment refers to this model and this complete year range.

Selection note

Before ordering, the vehicle model, year of manufacture, piston diameter and the “A” marking should be compared with the required spare part. The stated diameter is 66.35 mm.