Yamaha YZ 250 (CG 05) [1999] - cast pistons

PROX cast piston for Yamaha YZ 250 (CG 05) from 1999

The PROX cast piston is designed as a replacement piston for the Yamaha YZ 250 (CG 05), built in 1999. Its dimensions and design are tailored to this specific vehicle assignment and support a tailor-made selection for the upper engine range.

Function and execution

The piston is made of aluminum and has a cast construction. The standard compression is based on the standard design. A patented surface treatment helps reduce friction in the cylinder. In addition, the piston has a MoS2 skirt coating.

Technical data

• Material: aluminum
• Piston Type: Cast
• Piston compression: standard
• Diameter Ø: 66.37 mm
• Letter oversize: C
• Oversize: +0.02
• Stroke: 2T
• Specificity: Domed piston / fin cutout / suction hole / MoS2 skirt coating

Vehicle assignment

The PROX cast piston fits the Yamaha YZ 250 (CG 05), built in 1999. Before making your selection, check in particular the vehicle model, year of manufacture, piston diameter and the marking C with oversize +0.02 so that the technical version fits your engine.

Selection guide

With the diameter Ø 66.37 mm, the standard compression and the 2T stroke, this piston offers a clearly defined basis for replacement in equivalent OEM quality. The curved piston shape as well as the fin cutout and suction hole are part of the specified piston specification.