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

PROX cast piston for Yamaha YZ 250 (CG 20), built in 2005

The PROX cast piston is designed as a replacement piston for the Yamaha YZ 250 (CG 20) built in 2005. Its design and the specified dimensional data support a targeted selection for the revision of the upper engine area.

Technical features

• Material: aluminum
• Piston type: cast
• Piston compression: standard
• Diameter: Ø 66.36 mm
• Letter oversize: B
• Oversize: +0.01
• Stroke: 2T
• Specificity: domed piston, fin cutout, suction hole and MoS2 skirt coating

Function and execution

The curved piston shape as well as the slat cutout and intake hole are design features that are tailored to the specified engine design. The MoS2 skirt coating characterizes the design on the piston skirts. The piston is designed for standard compression and has a diameter of 66.36 mm with oversize +0.01.

Vehicle assignment

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

Selection note

When making the selection, the piston diameter Ø 66.36 mm, the letter B, the oversize +0.01 and the cast aluminum version must be taken into account in particular.