Service your four-stroke dirt bike, ATV, or road motorcycle’s valvetrain with premium, OEM quality valvetrain components from ProX. We offer a comprehensive range of valvetrain parts, including titanium and steel intake and exhaust valves, valve and spring kits, valve seals, cam chains, and valve shims (including shim kits). ProX titanium valves, manufactured to OEM specifications, provide a direct replacement for OE titanium equipped engines, while our steel valve kits offer a durable and affordable alternative. Complete the job with our valve shims and shim kits, available in popular sizes for dirt bikes, motorcycles, ATVs, and more. Upgrade your valvetrain with precision-engineered components for superior performance and longevity.

Showing 1–16 of 171 results

  • Sale!

    ProX Titanium Intake Valve – KTM250SX-F + KTM250EXC-F


    Your Price: $74.15
    SKU 28.6333-2

    ProX Racing Parts Titanium Intake Valve KTM250SX-F ’13-21 + KTM250EXC-F ‘.

  • Sale!

    ProX Titanium Intake Valve – YZ250F + WR250F


    Your Price: $74.15
    SKU 28.2419-2

    ProX Racing Parts Titanium Intake Valve YZ250F ’19-21 + WR250F ’20.

  • Sale!

    ProX Titanium Exhaust Valve – YZ450F + WR450F


    Your Price: $79.79
    SKU 28.2444-1

    ProX Racing Parts Titanium Exhaust Valve YZ450F ’14-19 + WR450F ’16-20.

  • Sale!

    ProX Titanium Exhaust Valve – YZ250F + WR250F


    Your Price: $74.15
    SKU 28.2414-1

    ProX Racing Parts Titanium Exhaust Valve YZ250F ’14-21 + WR250F ’15-20.

  • Sale! Placeholder

    ProX Titanium Exhaust Valve – KTM250SX-F


    Your Price: $74.15
    SKU 28.6343-1

    ProX Racing Parts Titanium Exhaust Valve KTM250SX-F

  • Sale!

    ProX Titanium Exhaust Valve – KTM250SX-F + KTM250EXC-F


    Your Price: $74.15
    SKU 28.6333-1

    ProX Racing Parts Titanium Exhaust Valve KTM250SX-F ’13-21 + KTM250EXC-F’.

  • Sale!

    ProX Titanium Exhaust Valve – KX250F + RM-Z250


    Your Price: $74.15
    SKU 28.4334-1

    ProX Racing Parts Titanium Exhaust Valve KX250F ’04-16 + RM-Z250 ’04-06.

  • Sale!

    ProX Titanium Intake Valve – KTM450SX-F + KTM450SM-R


    Your Price: $79.79
    SKU 28.6433-2

    ProX Racing Parts Titanium Intake Valve KTM450SX-F ’13-18 + KTM450SM-R ‘1.

  • Sale!

    ProX Titanium Intake Valve – KTM450SX-F + KTM505SX-F


    Your Price: $79.79
    SKU 28.6427-2

    ProX Racing Parts Titanium Intake Valve KTM450SX-F ’07-12 + KTM505SX-F ‘0.

  • Sale!

    ProX Titanium Exhaust Valve – KX450F – 12005-0049


    Your Price: $79.79
    SKU 28.4409-1

    ProX Racing Parts Titanium Exhaust Valve KX450F ’09-18.

  • Sale!

    ProX Titanium Intake Valve – RM-Z250


    Your Price: $74.15
    SKU 28.3340-2

    ProX Racing Parts Titanium Intake Valve RM-Z250 ’10-21.

  • Sale!

    ProX Titanium Exhaust Valve – RM-Z250


    Your Price: $74.15
    SKU 28.3337-1

    ProX Racing Parts Titanium Exhaust Valve RM-Z250 ’07-21.

  • Sale!

    ProX Titanium Intake Valve – YZ450F + WR450F


    Your Price: $79.79
    SKU 28.2444-2

    ProX Racing Parts Titanium Intake Valve YZ450F ’14-19 + WR450F ’16-20.

  • Sale!

    ProX Steel Ex. Valve Spring Kit – KX250F + RM-Z250


    Your Price: $136.47
    SKU 28.SES4335-1

    ProX Racing Parts Steel Ex. Valve/Spring Kit KX250F’04-16 + RM-Z250’04-06.

  • Sale!

    ProX Titanium Exhaust Valve – KTM450SX-F + KTM505SX-F


    Your Price: $79.79
    SKU 28.6427-1

    ProX Racing Parts Titanium Exhaust Valve KTM450SX-F ’07-12 + KTM505SX-F ‘.

  • Sale!

    ProX Titanium Intake Valve – KTM350SX-F + KTM350EXC-F


    Your Price: $70.34
    SKU 28.6351-2

    ProX Racing Parts Titanium Intake Valve KTM350SX-F ’11-21 + KTM350EXC-F’1.