Motocross/Dirt Bike Valves & Valvetrain Parts

Motorcycle Valves & Valve Train Parts
  • ProX® - Steel Valve and Spring Kit
    ProX®Steel Valve and Spring Kit (28.SIS3405-2)
    0
    # mpn4526313690
    Steel Valve and Spring Kit (28.SIS3405-2) by ProX®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from...
    Precise manufacturing and high-grade materialsExpertly crafted from the highest grade materials
    $119.58
  • ProX® - Steel Valve and Spring Kit
    ProX®Steel Valve and Spring Kit (28.SIS3338-2)
    0
    # mpn4526313689
    Steel Valve and Spring Kit (28.SIS3338-2) by ProX®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from...
    Precise manufacturing and high-grade materialsExpertly crafted from the highest grade materials
    $122.98
  • ProX® - Steel Valve and Spring Kit
    ProX®Steel Valve and Spring Kit (28.SES6351-1)
    0
    # mpn4526313686
    Steel Valve and Spring Kit (28.SES6351-1) by ProX®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from...
    Precise manufacturing and high-grade materialsExpertly crafted from the highest grade materials
    $122.98
  • ProX® - Steel Valve and Spring Kit
    ProX®Steel Valve and Spring Kit (28.SES4406-1)
    0
    # mpn4526313680
    Steel Valve and Spring Kit (28.SES4406-1) by ProX®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from...
    Precise manufacturing and high-grade materialsExpertly crafted from the highest grade materials
    $132.88
  • ProX® - Steel Valve and Spring Kit
    ProX®Steel Valve and Spring Kit (28.SES4335-1)
    0
    # mpn4526313679
    Steel Valve and Spring Kit (28.SES4335-1) by ProX®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from...
    Precise manufacturing and high-grade materialsExpertly crafted from the highest grade materials
    $126.22
  • ProX® - Steel Valve and Spring Kit
    ProX®Steel Valve and Spring Kit (28.SES3405-1)
    0
    # mpn4526313675
    Steel Valve and Spring Kit (28.SES3405-1) by ProX®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from...
    Precise manufacturing and high-grade materialsExpertly crafted from the highest grade materials
    $119.58
  • ProX® - Steel Valve and Spring Kit
    ProX®Steel Valve and Spring Kit (28.SES3338-1)
    0
    # mpn4526313674
    Steel Valve and Spring Kit (28.SES3338-1) by ProX®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from...
    Precise manufacturing and high-grade materialsExpertly crafted from the highest grade materials
    $122.98
  • ProX® - Steel Valve and Spring Kit
    ProX®Steel Valve and Spring Kit (28.SIS1405-2)
    0
    # mpn4526313079
    Steel Valve and Spring Kit by ProX®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from industry-leading...
    Precise manufacturing and high-grade materialsExpertly crafted from the highest grade materials
    $119.58
  • ProX® - Steel Valve and Spring Kit
    ProX®Steel Valve and Spring Kit (28.SIS1403-2)
    0
    # mpn4526313078
    Steel Valve and Spring Kit by ProX®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from industry-leading...
    Precise manufacturing and high-grade materialsExpertly crafted from the highest grade materials
    $122.73
  • ProX® - Steel Valve and Spring Kit
    ProX®Steel Valve and Spring Kit (28.SIS1340-2)
    0
    # mpn4526313077
    Steel Valve and Spring Kit by ProX®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from industry-leading...
    Precise manufacturing and high-grade materialsExpertly crafted from the highest grade materials
    $122.99
  • ProX® - Steel Valve and Spring Kit
    ProX®Steel Valve and Spring Kit (28.SIS1337-2)
    0
    # mpn4526313076
    Steel Valve and Spring Kit by ProX®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from industry-leading...
    Precise manufacturing and high-grade materialsExpertly crafted from the highest grade materials
    $122.98
  • ProX® - Steel Valve and Spring Kit
    ProX®Steel Valve and Spring Kit (28.SIS1336-2)
    0
    # mpn4526312739
    Steel Valve and Spring Kit by ProX®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from industry-leading...
    Precise manufacturing and high-grade materialsExpertly crafted from the highest grade materials
    $126.22
  • ProX® - Titanium Valve
    ProX®Titanium Valve (28.6433-2)
    0
    # mpn4967335111
    Titanium Valve (28.6433-2) by ProX®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from industry-leading...
    Precise manufacturing and high-grade materialsExpertly crafted from the highest grade materials
    $75.13
  • ProX® - Titanium Valve
    ProX®Titanium Valve (28.3405-1)
    0
    # mpn4871472863
    Titanium Valve (28.3405-1) by ProX®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from industry-leading...
    Precise manufacturing and high-grade materialsExpertly crafted from the highest grade materials
    $75.13
  • ProX® - Titanium Valve
    ProX®Titanium Valve (28.4406-1)
    0
    # mpn4871472822
    Titanium Valve by ProX®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from industry-leading materials...
    Precise manufacturing and high-grade materialsExpertly crafted from the highest grade materials
    $75.13
  • ProX® - Titanium Valve
    ProX®Titanium Valve (28.1346-1)
    0
    # mpn4871472793
    Titanium Valve (28.1346-1) by ProX®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from industry-leading...
    Precise manufacturing and high-grade materialsExpertly crafted from the highest grade materials
    $69.77
  • ProX® - Titanium Valve
    ProX®Titanium Valve (28.6326-1)
    0
    # mpn4871472769
    Titanium Valve (28.6326-1) by ProX®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from industry-leading...
    Precise manufacturing and high-grade materialsExpertly crafted from the highest grade materials
    $58.92
  • ProX® - Titanium Valve
    ProX®Titanium Valve (28.1405-2)
    0
    # mpn4871472737
    Titanium Valve by ProX®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from industry-leading materials...
    Precise manufacturing and high-grade materialsExpertly crafted from the highest grade materials
    $75.13
  • ProX® - Titanium Valve
    ProX®Titanium Valve (28.3405-2)
    0
    # mpn4871472724
    Titanium Valve (28.3405-2) by ProX®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from industry-leading...
    Precise manufacturing and high-grade materialsExpertly crafted from the highest grade materials
    $75.13
  • ProX® - Titanium Valve
    ProX®Titanium Valve (28.1340-2)
    0
    # mpn4871472685
    Titanium Valve (28.1340-2) by ProX®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from industry-leading...
    Precise manufacturing and high-grade materialsExpertly crafted from the highest grade materials
    $62.02
  • ProX® - Titanium Valve
    ProX®Titanium Valve (28.2423-1)
    0
    # mpn4871472671
    Titanium Valve (28.2423-1) by ProX®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from industry-leading...
    Precise manufacturing and high-grade materialsExpertly crafted from the highest grade materials
    $70.96
  • ProX® - Titanium Valve
    ProX®Titanium Valve (28.3408-2)
    0
    # mpn4871472626
    Titanium Valve (28.3408-2) by ProX®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from industry-leading...
    Precise manufacturing and high-grade materialsExpertly crafted from the highest grade materials
    $75.13
  • ProX® - Titanium Valve
    ProX®Titanium Valve (28.6423-1)
    0
    # mpn4871472624
    Titanium Valve (28.6423-1) by ProX®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from industry-leading...
    Precise manufacturing and high-grade materialsExpertly crafted from the highest grade materials
    $74.30
  • ProX® - Titanium Valve
    ProX®Titanium Valve (28.3337-2)
    0
    # mpn4871472620
    Titanium Valve by ProX®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from industry-leading materials...
    Precise manufacturing and high-grade materialsExpertly crafted from the highest grade materials
    $69.77
  • ProX® - Titanium Valve
    ProX®Titanium Valve (28.1402-2)
    0
    # mpn4851055710
    Titanium Valve (28.1402-2) by ProX®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from industry-leading...
    Precise manufacturing and high-grade materialsExpertly crafted from the highest grade materials
    $75.13
  • ProX® - Titanium Valve
    ProX®Titanium Valve (28.6433-1)
    0
    # mpn4526313670
    Titanium Valve (28.6433-1) by ProX®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from industry-leading...
    Precise manufacturing and high-grade materialsExpertly crafted from the highest grade materials
    $63.44
  • ProX® - Titanium Valve
    ProX®Titanium Valve (28.6427-2)
    0
    # mpn4526313669
    Titanium Valve (28.6427-2) by ProX®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from industry-leading...
    Precise manufacturing and high-grade materialsExpertly crafted from the highest grade materials
    $75.13
  • ProX® - Titanium Valve
    ProX®Titanium Valve (28.6427-1)
    0
    # mpn4526313668
    Titanium Valve (28.6427-1) by ProX®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from industry-leading...
    Precise manufacturing and high-grade materialsExpertly crafted from the highest grade materials
    $63.44
  • ProX® - Titanium Valve
    ProX®Titanium Valve (28.6423-2)
    0
    # mpn4526313666
    Titanium Valve (28.6423-2) by ProX®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from industry-leading...
    Precise manufacturing and high-grade materialsExpertly crafted from the highest grade materials
    $63.44
  • ProX® - Titanium Valve
    ProX®Titanium Valve (28.6351-2)
    0
    # mpn4526313664
    Titanium Valve by ProX®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from industry-leading materials...
    Precise manufacturing and high-grade materialsExpertly crafted from the highest grade materials
    $58.60




Motocross is one of the most challenging modern sports, and it provides an exhilarating experience to many two-wheeler enthusiasts of all ages worldwide. Motocross and dirt bikes are immediately recognizable for an aggressive stance, high ground clearance, narrow and rugged tires, and some other cues. These bikes feature great off-road ability, with motors producing high torque for improved performance on demanding motocross tracks or off-road routes. However, the top shape of the engine, including valves and valvetrain parts, is mandatory to ensure good performance and safety.

The intake and exhaust valves control the amount of the fuel-air mixture entering the engine and the flow of the burnt gases leaving it after combustion. The shape of the valves resembles a mushroom with a head and long stem. The stem runs in a valve guide to ensure the precision and effectiveness of operation. As the valves are subject to stresses and huge temperatures caused by combustion, they are prone to wear and even can be ruined under some conditions. You can replace them or upgrade the system with aftermarket valves which feature improved characteristics. In our online store, we have a large selection of premium motocross/dirt bike valves and valvetrain parts designed by top-ranked companies and offered at an affordable price.

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