PISTON KIT VERTEX 80.0 B YAMAHA WR/YZ 250 05-14, VERTEX 23129B OS +3.00 BIG BORE COMPR 13,5:1
4.1 Trustpilot 99.9% positive on eBay
Delivery to United States 5–8 business days
Spread the cost with 
Vertex UK piston kit 23129B. 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 standard. Specification: Bore size 80.00mm, oversize +3.00 [B 79.97mm], compression 13.5:1. Replacement Parts: Rings 590280000001 SET, Pin 715381, Clips 715381. Cross reference numbers: Piston (Std) 5NL-11631-20-00, Piston Ring Set (Std) 5NL-11603-00-00, Pin, Piston 5NL-11633-00-00, Circlip 93420-16086-00.
- SKU
- 23129B
- Brand
- Vertex
- Availability
- In Stock (2)
Fitments (27)
| Make | Model | Year |
|---|---|---|
| YAMAHA | WR 250F | 2001 |
| YAMAHA | WR 250F | 2002 |
| YAMAHA | WR 250F | 2003 |
| YAMAHA | WR 250F | 2004 |
| YAMAHA | WR 250F | 2005 |
| YAMAHA | WR 250F | 2006 |
| YAMAHA | WR 250F | 2007 |
| YAMAHA | WR 250F | 2008 |
| YAMAHA | WR 250F | 2009 |
| YAMAHA | WR 250F | 2010 |
| YAMAHA | WR 250F | 2011 |
| YAMAHA | WR 250F | 2012 |
| YAMAHA | WR 250F | 2013 |
| YAMAHA | WR 250F | 2014 |
| YAMAHA | YZ 250F | 2001 |
| YAMAHA | YZ 250F | 2002 |
| YAMAHA | YZ 250F | 2003 |
| YAMAHA | YZ 250F | 2004 |
| YAMAHA | YZ 250F | 2005 |
| YAMAHA | YZ 250F | 2006 |
| YAMAHA | YZ 250F | 2007 |
| YAMAHA | YZ 250F | 2008 |
| YAMAHA | YZ 250F | 2009 |
| YAMAHA | YZ 250F | 2010 |
| YAMAHA | YZ 250F | 2011 |
| YAMAHA | YZ 250F | 2012 |
| YAMAHA | YZ 250F | 2013 |
- General Product Group
- Engine
- General Product Type
- Pistons & Kits
- General Size
- 80mm
- Variant Id
- 282676
FULL DESCRIPTION
Vertex Big Bore Piston Kit
Enhance your motorcycle's performance with this Vertex Big Bore Piston Kit. Designed for high-performance applications, this kit offers a significant upgrade over standard components.
Key Features:
- Oversize Piston: Features an 80.00mm bore size, an oversize of +3.00mm, with a precise bore measurement of 79.97mm.
- High Compression Ratio: Engineered for a compression ratio of 13.5:1, providing increased power and responsiveness.
- Complete Kit: Includes the piston, high-quality rings, wrist pin, and circlips for a comprehensive replacement.
- OEM Quality: Vertex pistons are fitted as standard equipment on many OEM motorcycles, ensuring reliability and performance.
- Durable Construction: All pistons undergo a T-5 or T-6 hardening and tempering cycle for superior strength and longevity.
- Made in Italy: Crafted with precision and quality in Italy.
- Replacement Parts Available: Individual replacement rings, pins, and clips are available separately.
Specifications:
- Bore Size: 80.00mm
- Oversize: +3.00mm
- Compression Ratio: 13.5:1
QUESTIONS? JUST ASK
Talk to John or Phil. Real people, Monday to Friday, 10:00 to 17:00 (UK time).
Check the fitment table on this page against your make, model and year. Not sure? Call or email us and we will check it for you before you order.
Yes. We ship from the UK. Orders ship within 3 working days, then delivery to the United States takes 5–8 business days. The delivery price is shown at checkout before you pay. Delivery details
Yes. You have 14 days from delivery to return it, unused and in its original packaging. Contact us first and we will send you the return instructions. Returns policy
By card, PayPal, Apple Pay or Google Pay, or spread the cost with Klarna. Payment is taken securely by Stripe, and the options for your order are shown at checkout.
Any customs duties or import taxes charged in the United States are paid by you when the parcel arrives. Any tax we collect ourselves is shown at checkout before you pay.
More answers in our FAQ.
Trade pricing available
Buying parts for your business? Apply for a 2BrosParts trade account.