2Bros Parts

VALVE SPRING SET KX450F 09-16, KIBBLEWHITE 40-40660

$241.43

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Delivery to United States 5–8 business days

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This Kibblewhite titanium racing spring kit supports valve lifts up to 0.415 inches (10.54 mm) and is designed for high-revving four-stroke engines. The kit includes high-quality chrome silicon valve springs and titanium retainers to reduce valvetrain mass. It features application-specific engineering for intake and exhaust valves, providing consistent performance under extreme conditions. Intake specifications include 40 lb seat pressure and 130 lb @ 0.375-inch lift. Exhaust specifications include 70 lb seat pressure and 183 lb @ 0.375-inch lift. This kit is compatible with Kibblewhite #30-31600.

Specifications
SKU
65-733
Brand
Kibblewhite
Availability
In Stock (2)

Fitments (16)

MakeModelYear
KAWASAKIKLX F 4502009
KAWASAKIKLX F 4502010
KAWASAKIKLX F 4502011
KAWASAKIKLX F 4502012
KAWASAKIKLX F 4502013
KAWASAKIKLX F 4502014
KAWASAKIKLX F 4502015
KAWASAKIKLX F 4502016
KAWASAKIKX 450F2009
KAWASAKIKX 450F2010
KAWASAKIKX 450F2011
KAWASAKIKX 450F2012
KAWASAKIKX 450F2013
KAWASAKIKX 450F2014
KAWASAKIKX 450F2015
KAWASAKIKX 450F2016
General Product Group
Cam & Valvetrain
General Product Type
Valve Spring
Variant Id
264359
Delivery5–8 business days
14-Day ReturnsHassle-free
Easy CheckoutCard friendly
Product details

FULL DESCRIPTION

Kibblewhite Valve Spring Set for Kawasaki KX450F (2009-2016)

Upgrade your high-performance Kawasaki KX450F with this premium titanium racing valve spring kit from Kibblewhite. Engineered for the demanding environment of competitive racing, this kit provides the durability and consistency needed for high-revving four-stroke engines.

Key Features:

  • Constructed with high-quality chrome silicon valve springs for superior strength and longevity.
  • Features lightweight titanium retainers to reduce valvetrain mass, enhancing engine response.
  • Designed to reliably support valve lifts up to 0.415 inches (10.54 mm).
  • Application-specific engineering ensures optimal performance for both intake and exhaust valves.

Performance Specifications:

  • Exhaust Springs: Rated for 0.440" valve lift, with 70 lb seat pressure and 183 lb of pressure at 0.375" lift.
  • Intake Springs: Rated for 0.440" valve lift, with 40 lb seat pressure and 130 lb of pressure at 0.375" lift.

This Kibblewhite valve spring set is a critical component for any KX450F owner looking to maximize engine performance and reliability under extreme racing conditions.

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

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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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