Yamaha YZ 250 F (CG 21) [2005] - forged pistons

PROX forged pistons for Yamaha YZ 250 F (CG 21) – built in 2005

The PROX forged piston is designed for the Yamaha YZ 250 F (CG 21) built in 2005. Its forged aluminum design is based on a special alloy that reduces friction and is therefore designed to function reliably in the engine.

Function and execution

As a piston for the upper engine range, this component combines a forged design with standard piston compression. The design as a hollow piston with 5 valve pockets describes the specific piston shape and supports the clear selection for the vehicle in question.

Technical data

• Brand: PROX
• Material: aluminum
• Piston Type: Forged
• Piston compression: standard
• Diameter Ø: 76.95 mm
• Letter oversize: A
• Oversize: STD
• Rings Quantity: Set
• Stroke: 4T
• Specificity: hollow piston / 5 valve pockets

Vehicle assignment

The forged piston is intended for the Yamaha YZ 250 F (CG 21), built in 2005. The vehicle assignment refers to this entire year of construction.

Selection note

The diameter of 76.95 mm, the letter A, the marking STD and the design as a hollow piston with 5 valve pockets are particularly relevant for the selection of parts. These features should be compared with the existing engine component before ordering.