KIT EX VALVE+SPRING YZF250, PROX 28.SES2414-1 WRF250 15-17, EXHAUST
4.1 Trustpilot 99.9% positive on eBay
Free UK delivery 2–4 business days
Spread the cost with 
18+, T&Cs apply
ProX Steel Exhaust Valve/Spring Kit. This kit contains steel exhaust valves and specially designed stronger valve springs. The steel valve offers a lifespan up to 3 times longer than OEM titanium valves. The kit replaces OEM valves and springs and can be installed using OEM retainers, bases, and valve seats. Part number 28.SES2414-1. Manufactured by Pro-X Racing. Weight 98g.
- SKU
- 65-K101.PX
- Brand
- Pro-X Racing
- Availability
- In Stock (1)
Fitments (13)
| Make | Model | Year |
|---|---|---|
| YAMAHA | WR 250F | 2015 |
| YAMAHA | WR 250F | 2016 |
| YAMAHA | WR 250F | 2017 |
| YAMAHA | WR 250F | 2018 |
| YAMAHA | YZ 250F | 2014 |
| YAMAHA | YZ 250F | 2015 |
| YAMAHA | YZ 250F | 2016 |
| YAMAHA | YZ 250F | 2017 |
| YAMAHA | YZ 250F | 2018 |
| YAMAHA | YZ 250FX | 2015 |
| YAMAHA | YZ 250FX | 2016 |
| YAMAHA | YZ 250FX | 2017 |
| YAMAHA | YZ 250FX | 2018 |
- General Product Group
- Cam & Valvetrain
- General Product Type
- Valve & Spring Kit
- Variant Id
- 264448
FULL DESCRIPTION
ProX Steel Exhaust Valve and Spring Kit
Upgrade your motorcycle's performance and durability with the ProX Steel Exhaust Valve and Spring Kit. This comprehensive kit is designed to replace your OEM titanium exhaust valves and springs, offering a significant increase in lifespan. ProX utilizes high-quality steel for its valves, which are engineered to last up to three times longer than standard titanium valves.
Each kit includes a set of specially designed, stronger valve springs. These are crucial to accommodate the slightly increased weight of the steel valves, ensuring optimal performance and reliability. The ProX kit is designed for a straightforward installation, allowing you to use your existing OEM retainers, bases, and valve seats.
Key Features:
- Extends valve lifespan up to 3 times compared to OEM titanium valves.
- Constructed with durable steel for enhanced longevity.
- Includes stronger, specially designed valve springs to match the steel valves.
- Direct replacement for OEM exhaust valves and springs.
- Compatible with OEM retainers, bases, and valve seats for easy installation.
- Improves overall engine reliability and performance.
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.