2Bros Parts

PISTON KIT 95.00 FORGED 2003-2009 YAMAHA YZ450F FX-40045-C NAMURA

£149.94

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A forged aluminum piston kit with a 95.00 mm bore size and grade C piston. This kit is designed as a standard-compression replacement and features a hard-anodised crown and MOS2-coated skirt. It includes piston rings, wrist pin, and circlips for reliable service. The piston is CNC-machined for consistent volume and finish. Specifications include a nominal bore size of 95.00 mm, a piston diameter of 94.97 mm (grade C), and a compression ratio of 12.5:1. This is a single-cylinder, four-stroke application. Manufacturer part number FX-40045-C. Cross-reference OEM part numbers include 5TJ-11631-00, 5TA-11631-00, and 2S2-11631-20. Manufactured by Namura Technologies.

Specifications
SKU
56-W4785.C.NT.F
Brand
Namura Technologies
Availability
In Stock (11)

Fitments (46)

MakeModelYear
GAS-GASEC F 2502013
GAS-GASEC F 2502014
GAS-GASEC F 2502015
GAS-GASEC F 4502013
GAS-GASEC F 4502014
GAS-GASEC F 4502015
YAMAHAWR 450F2003
YAMAHAWR 450F2004
YAMAHAWR 450F2005
YAMAHAWR 450F2006
YAMAHAWR 450F2007
YAMAHAWR 450F2008
YAMAHAWR 450F2009
YAMAHAWR 450F2010
YAMAHAWR 450F2011
YAMAHAWR 450F2012
YAMAHAWR 450F2013
YAMAHAWR 450F2014
YAMAHAWR 450F2015
YAMAHAWRF 4502003
YAMAHAWRF 4502004
YAMAHAWRF 4502005
YAMAHAWRF 4502006
YAMAHAWRF 4502007
YAMAHAWRF 4502008
YAMAHAWRF 4502009
YAMAHAWRF 4502010
YAMAHAWRF 4502011
YAMAHAWRF 4502012
YAMAHAWRF 4502013
YAMAHAWRF 4502014
YAMAHAWRF 4502015
YAMAHAYZ 450F2003
YAMAHAYZ 450F2004
YAMAHAYZ 450F2005
YAMAHAYZ 450F2006
YAMAHAYZ 450F2007
YAMAHAYZ 450F2008
YAMAHAYZ 450F2009
YAMAHAYZF 4502003
YAMAHAYZF 4502004
YAMAHAYZF 4502005
YAMAHAYZF 4502006
YAMAHAYZF 4502007
YAMAHAYZF 4502008
YAMAHAYZF 4502009
General Product Group
Engine
General Product Type
Pistons & Kits
General Size
95mm
Variant Id
281074
Delivery2–4 business days
14-Day ReturnsHassle-free
Easy CheckoutCard friendly
Product details

FULL DESCRIPTION

Namura Technologies Forged Piston Kit 95.00mm

This high-quality forged aluminium piston kit is engineered as a direct replacement for the standard 95.00 mm bore. Designed for reliable service, this kit ensures consistent performance and durability for your vehicle.

Key Features

  • Forged Aluminium Construction: Offers superior strength and longevity compared to cast pistons.
  • Hard-Anodised Crown: Resists high temperatures and carbon buildup, extending piston life.
  • MOS2 (Moly) Skirt Coating: Significantly reduces friction during the critical break-in period, promoting faster and smoother running-in.
  • CNC-Machined Dome: Guarantees precise volume and a consistent surface finish for optimal combustion.
  • Complete Kit: Includes all necessary components for installation: piston, piston rings, wrist pin, and circlips.
  • Size Grade C: Specifically designed to match Yamaha's A/B/C cylinder grading system, ensuring a precise fit.

Specifications

  • Nominal Bore Size: 95.00 mm (Standard)
  • Piston Diameter (Grade C): 94.97 mm
  • Compression Ratio: 12.5:1 (Standard)
  • Engine Type: Single-cylinder, four-stroke
  • Manufacturer Part Number: FX-40045-C
Before you buy

QUESTIONS? JUST ASK

Talk to John or Phil. Real people, Monday to Friday, 10:00 to 17:00.

Call us0330 133 3748
Email us[email protected]

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.

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