YAMAHA YZ 250 1990-1995 GRADE A 67.94mm TWIN RING PISTON
4.4 Trustpilot 99.9% positive on eBay
Delivery to United States 5–8 business days
Spread the cost with 
Vertex pistons are manufactured using Low-Ex aluminum alloys with 12%, 18% or 21% silicon. The pistons are made using gravity cast or hydraulic forging processes and then refined through a high-tech heat treatment. Machining is completed using the latest CNC machines and diamond tools, allowing for specific surface finishes. Each Vertex piston undergoes rigorous manual and automatic quality control. Vertex pistons are coated with a special Molybdenum Bisulphite black coating for break-in and friction reduction. A new Phosphate Coating is also available, increasing hardness and surface porosity for superior adhesion and durability. This piston has a bore size of 67.94mm and is a twin ring piston.
- SKU
- V.2154A
- Brand
- Vertex
- Availability
- In Stock (2)
- SKU
- V.2154A
- Brand
- Vertex
- Availability
- In Stock (2)
FULL DESCRIPTION
High-Performance Vertex Twin Ring Piston - 67.94mm Grade A
Upgrade your engine with the Vertex Grade A Twin Ring Piston, engineered for precision and reliability. Designed to meet the demanding requirements of high-performance two-stroke engines, this piston provides a perfect balance of strength, durability, and friction reduction to keep your machine running at its peak.
Vertex pistons are manufactured using exotic Low-Ex (low expansion) silicon-charged aluminium alloys. Through a combination of gravity casting or hydraulic forging and advanced heat treatment processes, these pistons achieve a refined material structure that ensures long-term performance under stress.
Advanced Engineering and Surface Technology
Precision is at the heart of the Vertex design. Using state-of-the-art CNC machining and diamond tooling, each piston is crafted to exact specifications. To further enhance longevity and efficiency, this piston features a specialized Molybdenum Bisulphite black coating, which aids in the break-in process and significantly reduces internal friction.
This piston also incorporates a high-tech phosphate coating. Inspired by developments in Formula One technology, this surface treatment offers a slight increase in hardness and provides superior adhesion for the Molybdenum coating, effectively doubling its durability compared to standard finishes.
Key Features
- Precision Engineering: Manufactured with high-tech CNC machines for exact dimensional accuracy.
- Durable Material: Constructed from specialized Low-Ex aluminium alloys for maximum thermal stability.
- Superior Coating: Dual-layer protection using a Molybdenum Bisulphite finish supported by a phosphate base for reduced friction and extended wear.
- Quality Assured: Every piston undergoes rigorous manual and automatic quality control inspections to ensure industry-leading standards.
- Twin Ring Design: Engineered for optimal sealing and heat transfer within the cylinder bore.
QUESTIONS? JUST ASK
Talk to John or Phil. Real people, Monday to Friday, 10:00 to 17:00 (UK time).
Call or email us with your make, model and year 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.