PISTON KIT VERTEX 77.0 B YAMAHA YZ/WR 250 14-17, VERTEX 23941B COMPR 13,5:1
Vertex Piston Kit 23941B with a compression ratio of 13.5:1. Bore size is 77.00mm. 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 and fitted as standard equipment on many OEM bikes. Replacement parts: Rings 590277000006, Pin 715380, Clips 72055. Cross reference numbers: Piston Assy 1SM-116A0-01-00, Piston (Std) 1SM-11631-01-00, Piston Ring Set (Std) 1SM-11603-00-00, Pin, Piston 1SM-11633-00-00, Circlip 93450-17129-00.
- SKU
- 23941B
- Brand
- Vertex
- Availability
- In Stock (1)
FULL DESCRIPTION
Vertex Piston Kit
This high-quality Vertex piston kit is designed to meet or exceed OEM specifications for reliable engine performance. Engineered for durability and precision, this kit ensures your engine runs smoothly and efficiently.
Key Features:
- OEM Replacement Quality: Standard pistons and components are designed as direct replacements for original equipment.
- Complete Kit: Each kit includes the piston, piston rings, wrist pin, and circlips for a comprehensive repair.
- Heat Treated: All pistons undergo a T-5 or T-6 hardening and tempering cycle for enhanced strength and longevity.
- Made in Italy: Manufactured in Italy, adhering to high standards of quality and craftsmanship.
- Original Equipment Fitted: Vertex pistons are factory-fitted in many Original Equipment Manufacturer (OEM) bikes.
- Compression Ratio: Features a compression ratio of 13.5:1.
- Bore Size: 77.00mm (actual bore measurement 76.96mm).
Replacement Parts Available Separately:
- Rings: 590277000006
- Pin: 715380
- Clips: 72055
Cross Reference Numbers:
- Piston Assy: 1SM-116A0-01-00
- Piston (Std): 1SM-11631-01-00
- Piston Ring Set (Std): 1SM-11603-00-00
- Pin, Piston: 1SM-11633-00-00
- Circlip: 93450-17129-00


