KTM SX-F 350 2011-2012 GRADE B 87.97mm HIGH COMPRESSION 14.0:1
4.4 Trustpilot 99.9% positive on eBay
Free UK delivery 2–4 business days
Spread the cost with 
18+, T&Cs apply
Vertex four-stroke pistons are forged from high-quality 2618 aluminum alloy, suitable for high pressures in modern four-stroke engines. The piston skirt features a Molybdenum Disulphide (MOS2) coating for easier break-in and reduced wear. Vertex pistons offer unique profiles and compression ratios in A, B, C, and D sizes, with 0.01mm variations for a precise cylinder fit, maximizing power and performance while minimizing blow-by and oil consumption. This piston is Grade B, has a bore of 87.97mm, and a high compression ratio of 14.0:1.
- SKU
- V.3642B
- Brand
- Vertex
- Availability
- In Stock (1)
- SKU
- V.3642B
- Brand
- Vertex
- Availability
- In Stock (1)
FULL DESCRIPTION
Vertex High Compression Four-Stroke Piston
Upgrade your engine performance with the Vertex high compression four-stroke piston. Engineered for riders who demand reliability and power, this piston is forged from premium 2618 aluminum alloy. This high-strength material is specifically chosen to withstand the intense pressures and rigorous conditions found in modern high-performance four-stroke engines.
Key Features
- High Compression Design: Features a 14.0:1 compression ratio to maximize combustion efficiency and increase overall engine power output.
- Precision Engineering: Manufactured to an 87.97mm diameter, this Grade B piston allows for a precise fit within the cylinder to ensure optimal sealing.
- MOS2 Coating: Each piston is finished with a specialized Molybdenum Disulphide (MOS2) coating on the skirt to assist during the break-in period and minimize friction-related wear.
- Durable Construction: The forged 2618 aluminum alloy construction provides exceptional thermal stability and fatigue resistance, even under demanding racing conditions.
- Performance Optimization: Designed to reduce blow-by and oil consumption, ensuring your engine maintains consistent performance throughout its service life.
By choosing a precisely sized Vertex piston, you ensure that your engine clearances remain within factory specifications, translating to smoother operation and increased longevity. Vertex remains a top choice for engine builders and riders looking for quality replacement components that meet or exceed original equipment performance standards.
QUESTIONS? JUST ASK
Talk to John or Phil. Real people, Monday to Friday, 10:00 to 17:00.
Call or email us with your make, model and year 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.