Prox Cast Piston Kit 39.85mm
Prox Cast Piston Kit 39.85mm
Available in stock (9)
-
Estimated delivery: Feb 05 - Feb 09
About this product
About this product
Upgrade your engine's performance with the Prox Cast Piston Kit. Designed for reliability and optimized performance, this piston kit provides a stable and durable solution for your 2-stroke engine. Prox leverages advanced casting techniques and high-silicon aluminum alloy to deliver a piston that stands up to the demands of high-performance applications.
Description
The Prox Cast Piston Kit is engineered to provide exceptional stability and reduce thermal expansion, ensuring consistent performance under varying operating temperatures. Manufactured using gravity casting with a premium aluminum alloy containing approximately 18% silicon, this piston kit offers enhanced durability and wear resistance. The piston design closely mirrors OEM specifications, with subtle adjustments made by Prox engineers to optimize performance. Specifically designed for 2-stroke engines with both cast iron and Nikasil cylinder bores, Prox offers this piston in a standard size of 39.85mm, graded as A for precise fitment in Nikasil cylinders. Get the most out of your engine with this high-quality cast piston kit.
Features & highlights
- Enhanced stability and durability for reliable performance.
- Reduced thermal expansion thanks to high-silicon aluminum alloy construction.
- Designed for 2-stroke engines with cast iron and Nikasil cylinder bores.
- OEM-style design with performance-enhancing adjustments.
- Precision sizing (39.85mm) ensures optimal fit and function.
- Manufactured using gravity casting for superior material density.
Technical specifications
- Brand: Prox
- Part Number: 09103155
- Engine Type: 2-Stroke
- Piston Diameter: 39.85 mm
- Piston Material: Cast Aluminum Alloy
- Piston Size: Standard Size A
- Ring Material: Steel
Important to know
Ensure proper cylinder bore sizing and piston-to-cylinder clearance during installation. Professional installation is recommended.
Shipping & Return
Shipping & Return
Free shipping to GLS parcel shop parcel box for purchases over DKK 1,000.
GLS home delivery costs DKK 59.
We do our best to ship your order as quickly as possible. All orders are generally packed within 24 hours on weekdays.
There is a 14-day return policy. Read more
Parts Denmark Info
Parts Denmark Info
Parts Denmark is a new webshop based in Denmark. We have a physical location you can visit (No showroom yet), and we have both email and phone support in our opening hours.
Our company info is:
Parts Denmark ApS
VAT: DK45974758
Dam Holme 11
3660 Stenløse, Denmark
hello@partsdenmark.com
+45 222 333 29
Best regards,
William Svendsen & Martin Høyer (Owners)
Specifications
PROX
01.7010.A
Piston Kit
Aluminum Alloy, Cast
Steel
Standard Size A
39,85 mm
2-Stroke
Kit


Who is behind Parts Denmark
Martin and William are the duo behind Parts Denmark — an unlikely but awesome combo of a tech-savvy young IT wizard and a seasoned motorcycle guru who’s seen (and fixed) it all. Together, we’ve built a team with big ambitions, plenty of passion, and a shared mission to create great things — side-by-side with you.

