2Bros Parts

PISTON KIT VERTEX 98.0 A YAMAHA WR/YZ 450 03-15, VERTEX 23404A OS+3.00 BIG BORE COMPR 12,5:1

$270.47

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Delivery to United States 5–8 business days

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Vertex UK piston kit 23404A. Compression ratio 12.5:1. Standard pistons and components are OEM replacements. Kits include piston, rings, wrist pin and circlips. All pistons are heat treated with a T-5 or T-6 hardening and tempering cycle. Replacement rings are sold individually. Made in Italy. Fitted in many OEM bikes as standard. Bore size 98.00mm Big Bore +3.00mm [A 97.96mm]. Replacement parts: Rings 590298000001 SET, Pin 715382, Clips 72074.

Specifications
SKU
23404A
Brand
Vertex
Availability
In Stock (2)

Fitments (20)

MakeModelYear
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
YAMAHAYZ 450F2003
YAMAHAYZ 450F2004
YAMAHAYZ 450F2005
YAMAHAYZ 450F2006
YAMAHAYZ 450F2007
YAMAHAYZ 450F2008
YAMAHAYZ 450F2009
General Product Group
Engine
General Product Type
Pistons & Kits
General Size
98mm
Variant Id
282758
Delivery5–8 business days
14-Day ReturnsHassle-free
Easy CheckoutCard friendly
Product details

FULL DESCRIPTION

Vertex Piston Kit 98.0mm OS+3.00 Big Bore 12.5:1 Compression

Upgrade your engine's performance with this high-quality Vertex Piston Kit. Designed for precision and durability, this kit is engineered to meet or exceed Original Equipment Manufacturer (OEM) standards.

Key Features:

  • Big Bore Piston: Features a bore size of 98.00mm, with an overbore of +3.00mm, specifically measuring at 97.96mm.
  • High Compression Ratio: Offers a 12.5:1 compression ratio for increased power and performance.
  • Complete Kit: Includes the piston, piston rings, wrist pin, and circlips for a full replacement.
  • Heat Treated: All Vertex pistons undergo a T-5 or T-6 hardening and tempering cycle for enhanced strength and longevity.
  • OEM Fitment: Used as standard equipment in many original motorcycles, ensuring a reliable fit and performance.
  • Made in Italy: Crafted with expert Italian engineering and manufacturing.

Specifications:

  • Bore Size: 98.00mm Big Bore (+3.00mm)
  • Compression Ratio: 12.5:1

Replacement Parts Available:

  • Rings Set: 590298000001
  • Pin: 715382
  • Clips: 72074
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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