Yamaha YZ 250 (CG 17) [2004] - cast pistons

PROX cast piston for Yamaha YZ 250 (CG 17), built in 2004

The PROX cast piston is designed as a replacement for the Yamaha YZ 250 (CG 17) built in 2004. Its aluminum design and standard compression are based on equivalent original equipment manufacturer quality. This makes the piston suitable for targeted repairs to the upper engine area if the existing dimensions and specifications match.

Technical features

• Piston type: cast
• Material: aluminum
• 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

The MoS2 skirt coating is designed to reduce friction in the cylinder. The curved piston as well as the lamella cutout and suction hole are taken into account as design features of the piston design. The diameter of 66.36 mm and the marking B with oversize +0.01 support the dimension-related selection of the appropriate replacement piston.

Vehicle assignment

The PROX cast piston fits the Yamaha YZ 250 (CG 17), built in 2004. The assignment applies to this entire year range.

Selection note

Before ordering, the vehicle piston dimensions and the required oversize should be compared with the technical data of this piston. The version with Ø 66.36 mm, marking B and +0.01 oversize can be specifically selected.