PISTON KIT VERTEX 77.0 A YAMAHA YZ 250 08-13, VERTEX 23391A COMPR 13,5:1
4.1 Trustpilot 99.9% positive on eBay
Free UK delivery 2–4 business days
Spread the cost with 
18+, T&Cs apply
VERTEX UK PISTON KIT 23391A. Compression ratio 13.5:1. Bore size 77.00mm [A 76.95mm]. 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. Replacement parts: Rings 590377000001 SET, Pin 715381, 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
- 23391A
- Brand
- Vertex
- Availability
- In Stock (3)
Fitments (6)
| Make | Model | Year |
|---|---|---|
| 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
- 77mm
- Variant Id
- 282708
FULL DESCRIPTION
Vertex Piston Kit
This Vertex piston kit is designed as a high-quality replacement for your motorcycle's engine. Manufactured in Italy, Vertex pistons are fitted as standard equipment on many OEM bikes, ensuring reliability and performance.
Key Features:
- Complete kit includes piston, rings, wrist pin, and circlips.
- All pistons undergo a T-5 or T-6 hardening and tempering cycle for enhanced durability.
- Standard pistons and components are engineered to meet OEM specifications.
- Replacement rings are available for individual purchase.
Specifications:
- Bore Size: 77.00mm (A: 76.95mm)
- Compression Ratio: 13.5:1
Replacement Parts Available Separately:
- Rings: 590377000001 SET
- Pin: 715381
- 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
QUESTIONS? JUST ASK
Talk to John or Phil. Real people, Monday to Friday, 10:00 to 17:00.
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.
UK delivery is £4.99, or free on orders over £60. Orders ship within 3 working days, then delivery takes 2–4 business days. 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.
More answers in our FAQ.
Trade pricing available
Buying parts for your business? Apply for a 2BrosParts trade account.