HONDA CRF 250R 2020-2021 GRADE B 78.97mm STANDARD COMPRESSION 13.85:1
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, designed to withstand the demands of modern four-stroke engines. Each piston features a Molybdenum Disulphide (MOS2) coating on the skirt to facilitate break-in and minimize wear. Vertex pistons offer unique profiles and compression ratios in A, B, C, and D sizes, with variations of 0.01mm to ensure a precise fit within the cylinder, optimizing power and performance while reducing blow-by and oil consumption. This specific piston is Grade B, 78.97mm, with a standard compression ratio of 13.85:1.
- SKU
- V.4516B
- Brand
- Vertex
- Availability
- In Stock (4)
- SKU
- V.4516B
- Brand
- Vertex
- Availability
- In Stock (4)
FULL DESCRIPTION
Vertex High-Performance Four-Stroke Piston
Upgrade your engine's power and reliability with the Vertex four-stroke piston. Engineered for riders who demand precision, this piston is forged from high-quality 2618 aluminum alloy. This material choice ensures superior strength and durability, allowing the component to withstand the high pressures and extreme conditions found in modern high-performance engines.
Vertex pistons are designed with specific profiles to ensure an optimal fit. This Grade B piston measures 78.97mm and features a 13.85:1 compression ratio, matching the rigorous standards required for peak engine performance. By maintaining precise tolerances, this piston helps maximize power output while effectively minimizing oil consumption and blow-by.
Key Features
- Advanced Alloy Construction: Forged from 2618 aluminum alloy for exceptional structural integrity under load.
- MOS2 Skirt Coating: Each piston is finished with a Molybdenum Disulphide coating to reduce friction, aid in the break-in process, and minimize long-term wear.
- Precision Engineering: Manufactured to specific sizing standards to ensure the best possible seal within the cylinder.
- Optimized Compression: Engineered to maintain a 13.85:1 compression ratio for reliable power delivery.
- Reduced Blow-by: Precision sizing contributes to improved combustion chamber sealing, leading to enhanced engine efficiency.
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.