2Bros Parts

SPRING VALVE INTAKE RMZ450, XU-09527IS 12921-28H00

$17.46

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Delivery to United States 5–8 business days

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Intake valve spring made of SWOSC-V material (oil tempered steel wire). Some springs feature a progressive style design, which have more coils on one end. The end with more coils is heavier and should always be installed towards the bottom. Non-progressive springs are paint marked on the end that is to be installed towards the top. Wire diameter 3.3mm, outer diameter 25mm, inner diameter 18.5mm (+/-0.2mm), length 35mm (+/- 0.5mm), 6 coils. Replaces part number 12921-28H00.

Specifications
SKU
65-6377.PS
Brand
Dirt Racing
Availability
In Stock (10)

Fitments (22)

MakeModelYear
SUZUKIRM-Z 4502008
SUZUKIRM-Z 4502009
SUZUKIRM-Z 4502010
SUZUKIRM-Z 4502011
SUZUKIRM-Z 4502012
SUZUKIRM-Z 4502013
SUZUKIRM-Z 4502014
SUZUKIRM-Z 4502015
SUZUKIRM-Z 4502016
SUZUKIRM-Z 4502017
SUZUKIRM-Z 4502018
SUZUKIRM-Z 4502019
SUZUKIRMX 4502010
SUZUKIRMX 4502011
SUZUKIRMX 4502012
SUZUKIRMX 4502013
SUZUKIRMX 4502014
SUZUKIRMX 4502015
SUZUKIRMX 4502016
SUZUKIRMX 4502017
SUZUKIRMX 4502018
SUZUKIRMX 4502019
General Product Group
Cam & Valvetrain
General Product Type
Valve Spring
Variant Id
264321
Delivery5–8 business days
14-Day ReturnsHassle-free
Easy CheckoutCard friendly
Product details

FULL DESCRIPTION

Intake Valve Spring for RMZ450 and RMX450 Models

This intake valve spring is designed for high-performance applications on select Suzuki motorcycle models. Engineered for durability and optimal engine function, this spring is constructed from high-quality SWOSC-V material, which is oil-tempered steel wire.

Key Features:

  • Material: Made from SWOSC-V (oil tempered steel wire) for superior strength and longevity.
  • Design Options: May feature a progressive style design with more coils on one end for specific load characteristics.
  • Installation Guidance (Progressive): The end with more coils should always be installed towards the bottom of the assembly.
  • Installation Guidance (Non-Progressive): Springs that are not progressive will have a paint mark on the end that is meant to be installed towards the top.
  • Precise Dimensions: Engineered to exact specifications for reliable performance.

Specifications:

  • Wire Diameter: 3.3mm
  • Outer Diameter (O.D.): 25mm
  • Inner Diameter (I.D.): 18.5mm (+/- 0.2mm)
  • Length: 35mm (+/- 0.5mm)
  • Number of Rolls: 6

This intake valve spring is a crucial component for maintaining the integrity and performance of your engine's valve train.

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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