Prox Piston Kit - 250cc 4-stroke Engine
Prox Piston Kit - 250cc 4-stroke Engine
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Estimated delivery: Feb 05 - Feb 09
About this product
About this product
The Prox Piston Kit for 4-stroke engines provides a high-quality, reliable solution for your engine rebuild. This kit ensures optimal performance and longevity, delivering the power and durability you need. Upgrade your engine with confidence using this precision-engineered piston kit.
Description
This Prox Piston Kit is designed for 250cc 4-stroke engines and manufactured with precision using state-of-the-art CNC equipment. Crafted from a forged aluminum alloy with low expansion and low friction properties, the piston offers superior heat dissipation and reduced wear. The moly coated skirt minimizes friction, ensuring smooth operation and extended engine life. With a compression ratio of 13.5:1 and a standard bore size of 78.00 mm, this kit optimizes engine performance. This standard size B piston kit provides an exact fit, facilitating straightforward installation and dependable performance. Whether you're rebuilding or upgrading, the Prox Piston Kit delivers quality and reliability.
Features & highlights
- Precision machined for exact fit and optimal performance.
- Forged aluminum alloy construction ensures durability and heat resistance.
- Moly coated skirt reduces friction and wear.
- Designed for 250cc 4-stroke engines, enhancing power and efficiency.
- Complete kit includes piston, rings, wrist pin, and circlips for a comprehensive rebuild solution.
- Standard Size B for easy installation.
Technical specifications
- Brand: Prox
- Part Number: 01.1339.B
- Engine Type: 4-Stroke
- Displacement: 250 cc
- Bore Size: 78.00 mm
- Piston Size: 77.98 mm
- Compression Ratio: 13.5:1
- Piston Material: Forged Aluminum Alloy
- Skirt Coating: Moly Coated
- Type: Standard Size B
Important to know
No specific requirements or limitations are listed for this product.
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
01.1339.B
Piston Kit
78,00 mm
13.5:1
250 cc
Aluminum Alloy, Forged
77.98 mm
Moly Coated
4-Stroke
Standard Size B
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.

