Motocross/Dirt Bike Valves & Valvetrain Parts

Motorcycle Valves & Valve Train Parts
  • Outlaw Racing® - Valve Spring
    Outlaw Racing®Valve Spring (OR5371)
    0
    # mpn4632984617
    Valve Spring (OR5371) by Outlaw Racing®. 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
    $10.14
  • Outlaw Racing® - Valve Spring
    Outlaw Racing®Valve Spring (OR5318)
    0
    # mpn4632984616
    Valve Spring (OR5318) by Outlaw Racing®. 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
    $10.14
  • ProX® - CrN Coating Titanium Valve
    ProX®CrN Coating Titanium Valve (28.2423-2)
    0
    # mpn4871472576
    CrN Coating Titanium Valve (28.2423-2) 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
    $72.63
  • ProX® - Exhaust Steel Valve
    ProX®Exhaust Steel Valve (28.6520-1)
    0
    # mpn4526313671
    Exhaust Steel Valve (28.6520-1) 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
    $39.94
  • ProX® - Exhaust Steel Valve
    ProX®Exhaust Steel Valve (28.1495-1)
    0
    # mpn4526313378
    Exhaust Steel Valve (28.1495-1) 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
    $33.09
  • ProX® - Exhaust Steel Valve and Spring Kit
    ProX®Exhaust Steel Valve and Spring Kit (28.SES6327-1)
    0
    # mpn4526313682
    Exhaust Steel Valve and Spring Kit (28.SES6327-1) 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....
    Precise manufacturing and high-grade materialsExpertly crafted from the highest grade materials
    $122.98
  • ProX® - Exhaust Steel Valve and Spring Kit
    ProX®Exhaust Steel Valve and Spring Kit (28.SES3407-1)
    0
    # mpn4526313677
    Exhaust Steel Valve and Spring Kit (28.SES3407-1) 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....
    Precise manufacturing and high-grade materialsExpertly crafted from the highest grade materials
    $119.58
  • ProX® - Exhaust Valve
    ProX®Exhaust Valve (28.2414-1)
    0
    # mpn4871472777
    Exhaust 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® - Forged Steel Valve
    ProX®Forged Steel Valve (28.2418-3)
    0
    # mpn4526314034
    Forged Steel Valve (28.2418-3) 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
    $17.64
  • ProX® - Intake OEM Steel Valve
    ProX®Intake OEM Steel Valve (28.2418-2)
    0
    # mpn4526313855
    Intake OEM Steel Valve (28.2418-2) 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
    $16.55
  • ProX® - Intake Steel Valve
    ProX®Intake Steel Valve (28.6520-2)
    0
    # mpn4526313672
    Intake Steel Valve (28.6520-2) 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
    $25.76
  • ProX® - Intake Steel Valve
    ProX®Intake Steel Valve (28.1495-2)
    0
    # mpn4526313379
    Intake Steel Valve (28.1495-2) 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
    $24.23
  • ProX® - Intake Steel Valve and Spring Kit
    ProX®Intake Steel Valve and Spring Kit (28.SIS6327-2)
    0
    # mpn4526313700
    Intake Steel Valve and Spring Kit (28.SIS6327-2) 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...
    Precise manufacturing and high-grade materialsExpertly crafted from the highest grade materials
    $122.98
  • ProX® - Intake Steel Valve and Spring Kit
    ProX®Intake Steel Valve and Spring Kit (28.SIS3407-2)
    0
    # mpn4526313692
    Intake Steel Valve and Spring Kit (28.SIS3407-2) 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...
    Precise manufacturing and high-grade materialsExpertly crafted from the highest grade materials
    $119.58
  • ProX® - Intake Titanium Valve
    ProX®Intake Titanium Valve (28.6425-2)
    0
    # mpn4933222274
    Intake 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...
    Precise manufacturing and high-grade materialsExpertly crafted from the highest grade materials
    $75.13
  • ProX® - OEM Titanium Valve
    ProX®OEM Titanium Valve (28.2401-2)
    0
    # mpn4871472711
    OEM Titanium Valve (28.2401-2) 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
    $58.92
  • ProX® - One Piece Forged Titanium Valve
    ProX®One Piece Forged Titanium Valve (28.2423-3)
    0
    # mpn4967335258
    One Piece Forged Titanium Valve (28.2423-3) 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
    $75.13
  • ProX® - Steel Exhaust Valve and Spring Kit
    ProX®Steel Exhaust Valve and Spring Kit (28.SES2402-1)
    0
    # mpn4526313673
    Steel Exhaust Valve and Spring Kit (28.SES2402-1) 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....
    Precise manufacturing and high-grade materialsExpertly crafted from the highest grade materials
    $122.98
  • ProX® - Steel Intake Valve and Spring Kit
    ProX®Steel Intake Valve and Spring Kit (28.SIS2402-2)
    0
    # mpn4526313688
    Steel Intake Valve and Spring Kit (28.SIS2402-2) 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...
    Precise manufacturing and high-grade materialsExpertly crafted from the highest grade materials
    $182.66
  • ProX® - Steel Valve
    ProX®Steel Valve (28.1409-1)
    0
    # mpn4871472814
    Steel Valve (28.1409-1) 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
    $32.99
  • ProX® - Steel Valve
    ProX®Steel Valve (28.1040-2)
    0
    # mpn4851055740
    Steel Valve (28.1040-2) 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
    $12.70
  • ProX® - Steel Valve
    ProX®Steel Valve (28.1040-1)
    0
    # mpn4851055718
    Steel Valve (28.1040-1) 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
    $21.23
  • ProX® - Steel Valve
    ProX®Steel Valve (28.3402-2)
    0
    # mpn4526313646
    Steel Valve (28.3402-2) 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
    $23.39
  • ProX® - Steel Valve
    ProX®Steel Valve (28.3402-1)
    0
    # mpn4526313645
    Steel Valve (28.3402-1) 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
    $28.26
  • ProX® - Steel Valve
    ProX®Steel Valve (28.2200-2)
    0
    # mpn4526313639
    Steel Valve (28.2200-2) 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
    $14.04
  • ProX® - Steel Valve
    ProX®Steel Valve (28.2200-1)
    0
    # mpn4526313638
    Steel Valve (28.2200-1) 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
    $22.85
  • ProX® - Steel Valve
    ProX®Steel Valve (28.1654-2)
    0
    # mpn4526313381
    Steel Valve (28.1654-2) 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
    $33.46
  • ProX® - Steel Valve
    ProX®Steel Valve (28.1654-1)
    0
    # mpn4526313380
    Steel Valve (28.1654-1) 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
    $40.37
  • ProX® - Steel Valve
    ProX®Steel Valve (28.1381-2)
    0
    # mpn4526313377
    Steel Valve (28.1381-2) 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
    $18.71
  • ProX® - Steel Valve
    ProX®Steel Valve (28.1381-1)
    0
    # mpn4526313376
    Steel Valve (28.1381-1) 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
    $25.01




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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