Yamaha YZ 250 F (CG 34) [2014-2015] - forged pistons

PROX forged pistons for Yamaha YZ 250 F (CG 34) 2014-2015

The PROX forged piston is designed as a replacement part in equivalent original equipment manufacturer quality for the Yamaha YZ 250 F (CG 34) in the entire 2014-2015 model year range. Its forged aluminum design combines the specified piston dimensions with a standard compression of 13.5:1 suitable for this engine.

Function and execution

A patented surface treatment is designed to reduce friction in the cylinder. The flat crown with raised top part and 4 valve pockets corresponds to the specified piston geometry. The piston is intended for a 4T engine and is guided with a Rings Quantity Set.

Technical data

• Brand: PROX
• Piston Type: Forged
• Material: aluminum
• Diameter Ø: 76.95 mm
• Letter oversize: A
• Oversize: STD
• Piston compression: Standard, 13.5:1
• Stroke: 4T
• Specificity: Flat crown with raised top / 4 valve pockets
• Rings Quantity: Set

Vehicle assignment

The forged piston fits the Yamaha YZ 250 F (CG 34), built between 2014 and 2015. The assignment refers to this vehicle type and the complete year range mentioned.

Selection guide

The characteristic values Ø 76.95 mm, letter A and Oversize STD support the selection based on the existing motor version. Please coordinate the piston dimensions and design with the component to be replaced before ordering.