2Bros Parts

PISTON KIT 09-25 SX50 39.5mm B, PROX 01.6019.B

$60.40Only 1 left

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Delivery to United States 5–8 business days

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Piston 2-stroke kit 39.50mm bore. Ready to install, ProX Piston Kits are supplied complete with piston rings, wrist pin, and circlips. ProX pistons are precision machined on the latest CNC equipment and use the same low-expansion, low-friction piston alloy all major Japanese engine manufacturers use. Uses an OEM style tin coating to assist the break-in process. Meets or exceeds OEM quality. Direct OEM replacement. All products are factory tested for 100% reliability. Designed to handle increased power loads. ProX Racing products are a high quality replacement part. Piston rings, piston pin, piston clips included. SKU 56-W802.B.PX. Manufacturer Pro-X Racing. Part number 01.6019.B.

Specifications
SKU
56-W802.B.PX
Brand
Pro-X Racing
Availability
In Stock (1)

Fitments (31)

MakeModelYear
GASGASMC 502021
GASGASMC 502022
GASGASMC 502023
GASGASMC 502024
GASGASMC 502025
HUSQVARNATC 502017
HUSQVARNATC 502018
HUSQVARNATC 502019
HUSQVARNATC 502020
HUSQVARNATC 502021
HUSQVARNATC 502022
HUSQVARNATC 502023
HUSQVARNATC 502024
HUSQVARNATC 502025
KTM50 SX2009
KTM50 SX2010
KTM50 SX2011
KTM50 SX2012
KTM50 SX2013
KTM50 SX2014
KTM50 SX2015
KTM50 SX2016
KTM50 SX2017
KTM50 SX2018
KTM50 SX2019
KTM50 SX2020
KTM50 SX2021
KTM50 SX2022
KTM50 SX2023
KTM50 SX2024
KTM50 SX2025
General Product Group
Engine
General Product Type
Pistons & Kits
General Size
39.5mm
Variant Id
257811
Delivery5–8 business days
14-Day ReturnsHassle-free
Easy CheckoutCard friendly
Product details

FULL DESCRIPTION

ProX 39.5mm Piston Kit

This ProX Piston Kit is designed as a direct OEM replacement part, meeting or exceeding original equipment manufacturer quality standards. Each kit is supplied ready to install, including all necessary components: piston rings, wrist pin, and circlips for a complete solution.

ProX pistons are manufactured using precision machining on state-of-the-art CNC equipment. They utilize a low-expansion, low-friction piston alloy, consistent with the materials used by major Japanese engine manufacturers. The kit features an OEM-style tin coating, engineered to facilitate the break-in process during initial use.

This piston kit is engineered to handle increased power loads and has undergone factory testing to ensure 100% reliability. ProX Racing products are recognized for their high quality and are backed by a guarantee of satisfaction.

Key Features:

  • Complete 2-Stroke Piston Kit
  • 39.50mm Bore Size
  • Includes Piston Rings, Wrist Pin, and Circlips
  • Precision Machined on Latest CNC Equipment
  • Low-Expansion, Low-Friction Piston Alloy
  • OEM Style Tin Coating for Break-In Assistance
  • Meets or Exceeds OEM Quality
  • Direct OEM Replacement
  • Designed for Increased Power Loads
  • Factory Tested for 100% Reliability
Before you buy

QUESTIONS? JUST ASK

Talk to John or Phil. Real people, Monday to Friday, 10:00 to 17:00 (UK time).

Check the fitment table on this page against your make, model and year. Not sure? Call or email us and we will check it for you before you order.

Yes. We ship from the UK. Orders ship within 3 working days, then delivery to the United States takes 5–8 business days. The delivery price is shown at checkout before you pay. 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.

Any customs duties or import taxes charged in the United States are paid by you when the parcel arrives. Any tax we collect ourselves is shown at checkout before you pay.

More answers in our FAQ.

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