Yamaha YZ 450 F (CJ 23) [2019] - GP Racer Choice forged pistons

VERTEX GP Racer Choice forged pistons for the Yamaha YZ 450 F

The forged VERTEX GP Racer Choice forged piston is designed for the Yamaha YZ 450 F (CJ 23), built in 2019. Its optimized piston crown shape supports a targeted flame front and higher compression. Reinforcements in the piston structure limit the deformation of the piston crown and contribute to the resilient design for racing.

Function and design features

• Forged aluminum version.
• Optimized shape and design of the piston crown to improve the flame front and for higher compression.
• Reinforced piston structure to limit piston crown deformation.
• Short, chamfered piston pin with DLC treatment (Diamond Like Carbon).
• Clip with external tab that prevents rotation at high engine speeds.
• Very thin “GNH” piston ring made of high-strength steel.

Technical data

• Material: aluminum
• Piston Type: Forged
• Piston compression: Racing
• Diameter Ø: 96.95 mm
• Letter oversize: A
• Oversize: STD
• Bore diameter: 97.00 mm
• Rings Quantity: Set
• Stroke: 4T

Vehicle assignment

Suitable for the Yamaha YZ 450 F (CJ 23), built in 2019.

Factual note

The information on diameter, letter oversize, oversize and bore diameter makes it easier to compare with the intended motor configuration. Before selecting, these dimensions should be compared with the existing engine.