Description
Product Overview
The Vertex Top End Piston Kit is a complete, aftermarket solution engineered to meet original equipment manufacturer (OEM) specifications for powersports engines. Constructed from high‑grade machined aluminum, each piston delivers a lightweight yet robust design that resists wear and heat deformation. The kit includes pistons sized at 48.450 mm diameter, matching a cylinder bore of 48.500 mm, and is calibrated for a standard compression ratio, ensuring optimal combustion efficiency. With a total displacement of 85 cc, the kit is suitable for a range of small‑displacement sport bikes, ATVs, and snowmobiles. Dimensions of the package are compact (10 × 6.5 × 4 inches) and the weight is only 12 ounces, facilitating easy handling and storage.
Usage
Designed for both professional workshops and DIY enthusiasts, this piston kit excels in rebuilds, performance upgrades, and routine maintenance. It is ideal for riders seeking reliable power delivery on daily commutes, weekend track days, or off‑road adventures. The kit’s standard compression ratio makes it compatible with factory‑spec fuel maps, reducing the need for extensive tuning. Installation requires basic hand tools and follows the standard piston replacement procedure, making it accessible to mechanics of all skill levels.

Why Choose Us
Vertex has a long‑standing reputation for precision engineering and quality control. Every piston undergoes rigorous testing by certified engineers to verify dimensional accuracy, material integrity, and performance under high‑temperature conditions. Our commitment to exact OEM tolerances means the kit fits seamlessly, eliminating the guesswork often associated with aftermarket parts. Additionally, Vertex provides responsive customer support and a comprehensive warranty, giving you confidence that your investment is protected.
Key Features
- Machined aluminum construction for lightweight strength and heat resistance
- Exact 48.450 mm piston diameter matching 48.500 mm cylinder bore
- Standard compression ratio for factory‑compatible performance
- 85 cc displacement suitable for a variety of powersports engines
- Engineered and tested by professional engineers to ensure reliability
FAQ
Will this kit fit my 2024 ATV engine?
Yes, the Vertex Top End Piston Kit is designed for engines that use a 48.5 mm cylinder bore and a standard compression ratio. Verify your engine’s bore size in the service manual to confirm compatibility.
Do I need to replace rings when installing this kit?
While the kit includes pistons only, we recommend replacing piston rings simultaneously to ensure optimal sealing and longevity, especially if the engine has high mileage.
Is any special break‑in procedure required?
After installation, run the engine at moderate RPMs for the first 10‑15 minutes to allow the pistons to seat properly. Avoid full‑throttle operation during this initial break‑in period.
Can I use this kit for a performance build with a higher compression ratio?
The kit is calibrated for a standard compression ratio. For higher compression builds, you may need custom pistons or additional modifications to achieve the desired ratio.
What warranty does Vertex provide?
Vertex offers a one‑year limited warranty covering manufacturing defects. Contact our support team with your purchase details for assistance.






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