PISTON KIT 97mm B FORGED 2010-2013 YAMAHA YZF450 NAMURA FX-40046-B
4.1 Trustpilot 99.9% positive on eBay
Delivery to United States 5–8 business days
Spread the cost with 
Forged piston kit in B size engineered to the OEM 12.5:1 compression ratio, featuring a 96.96 mm forged piston for a nominal 97.00 mm bore. Supplied complete with piston, ring set, wrist pin and circlips, it provides a direct replacement solution for the fuel-injected 449 cm³ engine. Forged aluminium construction for strength and durability. Hard-anodised crown to improve heat resistance and reduce carbon build-up. MOS2 (molybdenum disulphide) skirt coating to reduce friction and assist running-in. 100% CNC-machined piston dome for precise combustion shape. Supplied with piston, rings, wrist pin and circlips. Piston size: 96.96 mm (B size, +0.01 mm). Nominal bore: 97.00 mm. Compression ratio: 12.5:1. Configuration: 4-stroke single-cylinder. Piston ring set: NX-40046R. Approximate kit weight: 0.599 kg. Cross-Reference OEM Part Numbers: 33D-116A0-00-00, 33D-11631-00-00, 33D-11603-00-00, 33D-11633-00-00, 93450-19052-00. Manufacturer: Namura Technologies.
- SKU
- 56-W261.B.NT.F
- Brand
- Namura Technologies
- Availability
- In Stock (10)
Fitments (8)
| Make | Model | Year |
|---|---|---|
| YAMAHA | YZ 450F | 2010 |
| YAMAHA | YZ 450F | 2011 |
| YAMAHA | YZ 450F | 2012 |
| YAMAHA | YZ 450F | 2013 |
| YAMAHA | YZF 450 | 2010 |
| YAMAHA | YZF 450 | 2011 |
| YAMAHA | YZF 450 | 2012 |
| YAMAHA | YZF 450 | 2013 |
- General Product Group
- Engine
- General Product Type
- Pistons & Kits
- General Size
- 97mm
- Variant Id
- 281076
FULL DESCRIPTION
This is a Namura forged piston kit, designed as a direct replacement for the fuel-injected 449cc engine. It is engineered to the original equipment manufacturer's 12.5:1 compression ratio and features a forged piston with a nominal bore size.
Key Features
- Forged aluminium construction offers enhanced strength and durability for demanding applications.
- The hard-anodised piston crown is designed to improve heat resistance and minimize carbon build-up, contributing to engine longevity.
- Features a MOS2 (molybdenum disulphide) skirt coating, which reduces friction and assists in the running-in process for smoother initial operation.
- Each piston dome is 100% CNC-machined to ensure a precise combustion shape, optimizing performance.
- This kit is supplied complete with the piston, a full set of piston rings, the necessary wrist pin, and circlips for a comprehensive replacement.
Specifications
- Piston Size: 96.96 mm (B size, nominal +0.01 mm)
- Nominal Bore: 97.00 mm
- Compression Ratio: 12.5:1
- Engine Configuration: 4-stroke single-cylinder
- Piston Ring Set Reference: NX-40046R
- Approximate Kit Weight: 0.599 kg
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.
Trade pricing available
Buying parts for your business? Apply for a 2BrosParts trade account.