Dirt Bike Engine
Explore our selection for dirt bike parts for adding horsepower or reliability to a dirt bike's engine. We feature engine parts from Wiseco, Vertex, and more common engine part manufacturers. Get new pistons and gasket kits for re-freshening engines to withstand any conditions you put your bike through!
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Dirt Bike Cams and Parts
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Dirt Bike Connecting Rods and Parts
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Dirt Bike Crankcases and Parts
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Dirt Bike Crankshafts and Parts
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Dirt Bike Cylinder Heads and Parts
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Dirt Bike Cylinders and Parts
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Dirt Bike Engine Bearings
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Dirt Bike Engine Covers
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Dirt Bike Engine Gaskets and Kits
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Dirt Bike Engine Rebuild Kits
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Dirt Bike Engine Seals - Orings and Kits
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Dirt Bike Engine Valves and Parts
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Dirt Bike Flywheel and Rod Assemblies
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Dirt Bike Fuel Filters
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Dirt Bike Miscellaneous Engine Parts
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Dirt Bike Oil Coolers
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Dirt Bike Oil Filters
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Dirt Bike Oil Lines
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Dirt Bike Oil Pumps
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Dirt Bike Piston and Ring Kits
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Dirt Bike Piston Rings Only
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Dirt Bike Wrist Pins and Circlips
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
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PROX Valve and Spring Kit 28.SIS4406-2
PROX
$174.84PROX Valve and Spring Kit 28.SIS4406-2Replaces the OEM valves and valve springs, Steel, nitrided valves for increased durability and less wear under extreme conditions, Stronger valve springs deal with the extra weight of the steel valves, Springs are...9261031- SKU:
- 9261031
- Availability:
- Ships Same Business Day
- Weight:
- 0.36 LBS
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- APPLICATION:
- INTAKE
- PRODUCT NAME:
- SPRING KIT
- TYPE:
- VALVE
$174.84 -
PROX Valve and Spring Kit 28.SES4406-1
PROX
$174.84PROX Valve and Spring Kit 28.SES4406-1Replaces the OEM valves and valve springs, Steel, nitrided valves for increased durability and less wear under extreme conditions, Stronger valve springs deal with the extra weight of the steel valves, Springs are...9261032- SKU:
- 9261032
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- MATERIAL:
- STEEL
- APPLICATION:
- EXHAUST
- PRODUCT NAME:
- SPRING KIT
- TYPE:
- VALVE
$174.84 -
PROX Valve and Spring Kit 28.SIS4409-2
PROX
$174.84PROX Valve and Spring Kit 28.SIS4409-2Replaces the OEM valves and valve springs, Steel, nitrided valves for increased durability and less wear under extreme conditions, Stronger valve springs deal with the extra weight of the steel valves, Springs are...9261033- SKU:
- 9261033
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- UNITS:
- KIT
- APPLICATION:
- INTAKE
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- SPRING KIT
- TYPE:
- VALVE
$174.84 -
PROX Valve and Spring Kit 28.SES4409-1
PROX
$174.84PROX Valve and Spring Kit 28.SES4409-1Replaces the OEM valves and valve springs, Steel, nitrided valves for increased durability and less wear under extreme conditions, Stronger valve springs deal with the extra weight of the steel valves, Springs are...9261034- SKU:
- 9261034
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- APPLICATION:
- EXHAUST
- PRODUCT NAME:
- SPRING KIT
- TYPE:
- VALVE
$174.84 -
PROX Valve and Spring Kit 28.SIS3405-2
PROX
$157.34PROX Valve and Spring Kit 28.SIS3405-2Replaces the OEM valves and valve springs, Steel, nitrided valves for increased durability and less wear under extreme conditions, Stronger valve springs deal with the extra weight of the steel valves, Springs are...9261035- SKU:
- 9261035
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- VALVE
- APPLICATION:
- INTAKE
- PRODUCT NAME:
- SPRING KIT
$157.34 -
PROX Valve and Spring Kit 28.SES3405-1
PROX
$157.34PROX Valve and Spring Kit 28.SES3405-1Replaces the OEM valves and valve springs, Steel, nitrided valves for increased durability and less wear under extreme conditions, Stronger valve springs deal with the extra weight of the steel valves, Springs are...9261036- SKU:
- 9261036
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 LBS
- APPLICATION:
- EXHAUST
- TYPE:
- VALVE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- MATERIAL:
- STEEL
- PRODUCT NAME:
- SPRING KIT
$157.34 -
PROX Valve and Spring Kit 28.SIS3407-2
PROX
$157.34PROX Valve and Spring Kit 28.SIS3407-2Replaces the OEM valves and valve springs, Steel, nitrided valves for increased durability and less wear under extreme conditions, Stronger valve springs deal with the extra weight of the steel valves, Springs are...9261037- SKU:
- 9261037
- Availability:
- Ships Same Business Day
- Weight:
- 0.32 LBS
- PRODUCT NAME:
- SPRING KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- VALVE
- APPLICATION:
- INTAKE
- MATERIAL:
- STEEL
$157.34 -
PROX Valve and Spring Kit 28.SES3407-1
PROX
$157.34PROX Valve and Spring Kit 28.SES3407-1Replaces the OEM valves and valve springs, Steel, nitrided valves for increased durability and less wear under extreme conditions, Stronger valve springs deal with the extra weight of the steel valves, Springs are...9261038- SKU:
- 9261038
- Availability:
- Ships Same Business Day
- Weight:
- 0.22 LBS
- APPLICATION:
- EXHAUST
- TYPE:
- VALVE
- PRODUCT NAME:
- SPRING KIT
- UNITS:
- KIT
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
$157.34 -
PROX Valve and Spring Kit 28.SIS3408-2
PROX
$157.34PROX Valve and Spring Kit 28.SIS3408-2Replaces the OEM valves and valve springs, Steel, nitrided valves for increased durability and less wear under extreme conditions, Stronger valve springs deal with the extra weight of the steel valves, Springs are...9261039- SKU:
- 9261039
- Availability:
- Ships Same Business Day
- Weight:
- 0.32 LBS
- PRODUCT NAME:
- SPRING KIT
- TYPE:
- VALVE
- APPLICATION:
- INTAKE
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$157.34 -
PROX Valve and Spring Kit 28.SES3408-1
PROX
$157.34PROX Valve and Spring Kit 28.SES3408-1Replaces the OEM valves and valve springs, Steel, nitrided valves for increased durability and less wear under extreme conditions, Stronger valve springs deal with the extra weight of the steel valves, Springs are...9261040- SKU:
- 9261040
- Availability:
- Ships Same Business Day
- Weight:
- 0.26 LBS
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- VALVE
- APPLICATION:
- EXHAUST
- PRODUCT NAME:
- SPRING KIT
$157.34 -
PROX Intake Valve 28.1409-2
PROX
$143.95Manufactured to the highest precision and quality, Constructed to meet OEM specifications, Available in standard sizes only9260814- SKU:
- 9260814
- Weight:
- 1.00 LBS
$143.95Qty in Cart: 0Quantity:Price:$143.95Subtotal: -
PROX Exhaust Valve 28.3407-1
PROX
$143.95Manufactured to the highest precision and quality, Constructed to meet OEM specifications, Available in standard sizes only9260832- SKU:
- 9260832
- Weight:
- 0.10 LBS
$143.95Qty in Cart: 0Quantity:Price:$143.95Subtotal: -
PROX Exhaust Valve 28.1040-1
PROX
$23.59PROX Exhaust Valve 28.1040-1Manufactured to the highest precision and quality, Constructed to meet OEM specifications, Available in standard sizes only9260662- SKU:
- 9260662
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
$23.59Qty in Cart: 0Quantity:Price:$23.59Subtotal: -
PROX Intake Valve 28.1040-2
PROX
$14.11PROX Intake Valve 28.1040-2Manufactured to the highest precision and quality, Constructed to meet OEM specifications, Available in standard sizes only9260663- SKU:
- 9260663
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
$14.11Qty in Cart: 0Quantity:Price:$14.11Subtotal: -
PROX Exhaust Valve 28.1070-1
PROX
$25.39PROX Exhaust Valve 28.1070-1Manufactured to the highest precision and quality, Constructed to meet OEM specifications, Available in standard sizes only9260664- SKU:
- 9260664
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- APPLICATION:
- EXHAUST
- MATERIAL:
- STEEL
- PRODUCT NAME:
- VALVE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
$25.39 -
PROX Intake Valve 28.1070-2
PROX
$15.97PROX Intake Valve 28.1070-2Manufactured to the highest precision and quality, Constructed to meet OEM specifications, Available in standard sizes only9260665- SKU:
- 9260665
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- INTAKE
- MATERIAL:
- STEEL
- PRODUCT NAME:
- VALVE
- UNITS:
- EACH
$15.97 -
PROX Exhaust Valve 28.1226-1
PROX
$29.95PROX Exhaust Valve 28.1226-1Manufactured to the highest precision and quality, Constructed to meet OEM specifications, Available in standard sizes only9260666- SKU:
- 9260666
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- MATERIAL:
- STEEL
- PRODUCT NAME:
- VALVE
- APPLICATION:
- EXHAUST
$29.95 -
PROX Intake Valve 28.1226-2
PROX
$20.79PROX Intake Valve 28.1226-2Manufactured to the highest precision and quality, Constructed to meet OEM specifications, Available in standard sizes only9260667- SKU:
- 9260667
- Availability:
- Ships Same Business Day
- Weight:
- 0.09 LBS
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- VALVE
- APPLICATION:
- INTAKE
- UNITS:
- EACH
$20.79 -
PROX Exhaust Valve 28.1227-1
PROX
$31.23PROX Exhaust Valve 28.1227-1Manufactured to the highest precision and quality, Constructed to meet OEM specifications, Available in standard sizes only9260668- SKU:
- 9260668
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- UNITS:
- EACH
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- EXHAUST
- PRODUCT NAME:
- VALVE
$31.23 -
PROX Intake Valve 28.1227-2
PROX
$21.78PROX Intake Valve 28.1227-2Manufactured to the highest precision and quality, Constructed to meet OEM specifications, Available in standard sizes only9260669- SKU:
- 9260669
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- RIDING STYLE:
- OFF-ROAD
- MATERIAL:
- STEEL
- PRODUCT NAME:
- VALVE
- APPLICATION:
- INTAKE
- UNITS:
- EACH
$21.78
