SPRING VALVE INTAKE RMZ450, XU-09527IS 12921-28H00
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.
- SKU
- 65-6377.PS
- Brand
- Dirt Racing
- Availability
- In Stock (10)
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.


