PISTON KIT VERTEX 77.0 A GP YAMAHA YZ 250 08-13, VERTEX 23738A HC COMPR 14,2:1 GP RACERS CHOICE
PISTON KIT VERTEX 23738A. Bore size 77.00mm [A 76.95mm]. Compression ratio 14.2:1. GP Racer Choice. Standard pistons and components are OEM replacements. Kits include piston, rings, wrist pin, and circlips. All pistons are heat treated with a T-5 or T-6 hardening and tempering cycle. Replacement rings are sold individually. Made in Italy. Fitted in many OEM bikes as STD. Replacement parts: Rings 590277000002 SET, Pin 711195, Clips 72055. Cross reference numbers: Piston (Std) 17D-11631-90-00, Piston Ring Set (Std) 17D-11603-00-00, Pin, Piston 17D-11633-00-00, Circlip 93450-17129-00.
- SKU
- 23738A
- Brand
- Vertex
- Availability
- In Stock (1)
FULL DESCRIPTION
Vertex Piston Kit - GP Racer's Choice
This Vertex Piston Kit is designed for high-performance applications, offering a 14.2:1 compression ratio for maximum power output. It is specifically engineered as a GP Racer's Choice, providing an edge for competitive riding.
Key Features:
- High Compression Ratio: Features a 14.2:1 compression ratio, ideal for racing applications.
- Complete Kit: Includes piston, rings, wrist pin, and circlips for a full replacement.
- Heat Treated Components: All pistons undergo a T-5 or T-6 hardening and tempering cycle for enhanced durability and performance.
- OEM Quality: Vertex pistons are fitted as standard equipment on many Original Equipment Manufacturer (OEM) bikes, ensuring high quality and reliability.
- Durable Construction: Made in Italy with premium materials for long-lasting performance.
- Precision Sizing: Bore size is 77.00mm (A spec 76.95mm).
Replacement Parts Available:
- Piston Rings (Set)
- Piston Pin
- Circlips


