PISTON KIT 90-91 KX250 67.40 B, PROX 01.4306.B
4.4 Trustpilot 99.9% positive on eBay
Free UK delivery 2–4 business days
Spread the cost with 18+, T&Cs apply
ProX Piston Kit 67.40mm Bore. This 2-stroke kit is ready to install and includes piston rings, wrist pin, and circlips. ProX pistons are precision machined using the latest CNC equipment and utilize a low-expansion, low-friction piston alloy, the same used by major Japanese engine manufacturers. Features an OEM style tin coating to aid the break-in process. Includes replacement piston rings (02.4305), piston pin, and piston clips (05.1810). Part number 01.4306.B.
- SKU
- 56-W607+00B.PX
- Brand
- Pro-X Racing
- Availability
- In Stock (1)
Fitments (4)
| Make | Model | Year |
|---|---|---|
| KAWASAKI | KDX 250 E | 1992 |
| KAWASAKI | KDX 250 E | 1993 |
| KAWASAKI | KDX 250 E | 1994 |
| KAWASAKI | KDX 250 E | 1995 |
- General Product Group
- Engine
- General Product Type
- Pistons & Kits
- General Size
- 67.40 mm
- Variant Id
- 257087
FULL DESCRIPTION
ProX Piston Kit - 67.40mm Bore
This ProX Piston Kit is designed for immediate installation, providing all necessary components for a complete engine rebuild. Each kit includes the piston, piston rings, wrist pin, and circlips.
ProX pistons are manufactured using advanced CNC machinery, ensuring high precision and quality. The pistons are crafted from a low-expansion, low-friction alloy, mirroring the materials used by major Japanese engine manufacturers. This choice of material contributes to optimal engine performance and longevity.
To facilitate the initial break-in period of your machine, the piston features an OEM-style tin coating. This coating helps to reduce friction during the crucial first stages of operation.
Key features:
- Complete piston kit for easy installation.
- Precision machined using state-of-the-art CNC equipment.
- Constructed from low-expansion, low-friction alloy.
- Includes piston rings, wrist pin, and circlips.
- OEM-style tin coating for enhanced break-in.
- Replacement parts available: Piston Rings (02.4305), Piston Pin, Piston Clips (05.1810).
- Bore Size: 67.40mm.
QUESTIONS? JUST ASK
Talk to John or Phil. Real people, Monday to Friday, 10:00 to 17:00.
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.
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.


