PISTON KIT 05-09 CR250 66.40 B, PROX 01.1325.A1 HONDA MX
4.1 Trustpilot 99.9% positive on eBay
Free UK delivery 2–4 business days
Spread the cost with 18+, T&Cs apply
ProX Piston Kit B 66.40mm Bore. Precision machined on state-of-the-art CNC equipment using a low-expansion, low-friction piston alloy similar to that used by major Japanese engine manufacturers. This kit offers a first-class solution to replace the original piston. Features OEM style Tin coating to assist the wear-in process and a new skirt coating that reduces friction after wear-in, increasing performance. Nominal piston size is 66.35mm. Includes replacement parts PROX RING SET 02.1325, PROX PISTON PIN 04.1856, and PROX CLIPS 05.1812. Manufacturer part number 01.1325.A1.
- SKU
- 56-W860+00B.PX
- Brand
- Pro-X Racing
- Availability
- In Stock (2)
- General Product Group
- Engine
- General Product Type
- Pistons & Kits
- General Size
- 66.40mm
- Variant Id
- 258098
FULL DESCRIPTION
ProX Piston Kit - High Performance Replacement
Upgrade your engine with the ProX Piston Kit, engineered for exceptional performance and durability. This premium piston is precision machined using state-of-the-art CNC equipment, utilizing the same advanced low-expansion, low-friction alloy trusted by major Japanese engine manufacturers. ProX Piston Kits offer a superior solution for replacing original pistons in your motorcycle, scooter, moped, ATV, or personal watercraft.
This kit features a special coating designed to optimize performance and engine life. The OEM-style tin coating aids in the crucial break-in process, while a newly developed skirt coating not only assists with wear-in but also actively reduces friction once the engine is running. This advanced black coating, crafted from a specialized material blend, is proven to enhance overall performance.
Key Features:
- Precision machined from a low-expansion, low-friction alloy.
- Utilizes the same high-quality materials as leading Japanese manufacturers.
- Features advanced skirt coating for reduced friction and improved performance.
- Includes OEM-style tin coating to aid in the initial engine wear-in process.
- A first-class replacement part for your powersports vehicle.
Replacement Parts Available:
- ProX Ring Set
- ProX Piston Pin
- ProX Clips
Piston Nominal Size: 66.35mm
Kit Bore Size: 66.40mm
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.


