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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PROX Intake Valve 28.1381-2
PROX
$20.79PROX Intake Valve 28.1381-2Manufactured to the highest precision and quality, Constructed to meet OEM specifications, Available in standard sizes only09260676- SKU:
- 09260676
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- APPLICATION:
- INTAKE
- UNITS:
- EACH
- MATERIAL:
- STEEL
- PRODUCT NAME:
- VALVE
- RIDING STYLE:
- OFF-ROAD
$20.79 -
PROX Exhaust Valve 28.1407-1
PROX
$44.95PROX Exhaust Valve 28.1407-1Manufactured to the highest precision and quality, Constructed to meet OEM specifications, Available in standard sizes only09260677- SKU:
- 09260677
- Availability:
- Ships Same Business Day
- Weight:
- 0.09 LBS
- APPLICATION:
- EXHAUST
- PRODUCT NAME:
- VALVE
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
$44.95 -
PROX Exhaust Valve 28.2200-1
PROX
$25.39PROX Exhaust Valve 28.2200-1Manufactured to the highest precision and quality, Constructed to meet OEM specifications, Available in standard sizes only09260678- SKU:
- 09260678
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- APPLICATION:
- EXHAUST
- PRODUCT NAME:
- VALVE
- UNITS:
- EACH
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
$25.39 -
PROX Intake Valve 28.2200-2
PROX
$15.60PROX Intake Valve 28.2200-2Manufactured to the highest precision and quality, Constructed to meet OEM specifications, Available in standard sizes only09260679- SKU:
- 09260679
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- APPLICATION:
- INTAKE
- MATERIAL:
- STEEL
- PRODUCT NAME:
- VALVE
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
$15.60 -
PROX Intake Valve 28.6520-2
PROX
$34.95PROX Intake Valve 28.6520-2Manufactured to the highest precision and quality, Constructed to meet OEM specifications, Available in standard sizes only09260689- SKU:
- 09260689
- Availability:
- Ships Same Business Day
- Weight:
- 0.12 LBS
- APPLICATION:
- INTAKE
- MATERIAL:
- STEEL
- PRODUCT NAME:
- VALVE
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
$34.95 -
PROX Valve and Spring Kit 28.SES2402-1
PROX
$161.82PROX Valve and Spring Kit 28.SES2402-1Replaces 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...09261455- SKU:
- 09261455
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- SPRING KIT
- APPLICATION:
- EXHAUST
- TYPE:
- VALVE
$161.82 -
PROX Valve and Spring Kit 28.SES3338-1
PROX
$161.82PROX Valve and Spring Kit 28.SES3338-1Replaces 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...09261456- SKU:
- 09261456
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- UNITS:
- KIT
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- EXHAUST
- PRODUCT NAME:
- SPRING KIT
- TYPE:
- VALVE
$161.82 -
PROX Valve and Spring Kit 28.SIS1336-2
PROX
$161.82PROX Valve and Spring Kit 28.SIS1336-2Replaces 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...09261458- SKU:
- 09261458
- Availability:
- Ships Same Business Day
- Weight:
- 0.29 LBS
- PRODUCT NAME:
- SPRING KIT
- TYPE:
- VALVE
- APPLICATION:
- INTAKE
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$161.82 -
PROX Valve and Spring Kit 28.SIS1337-2
PROX
$161.82PROX Valve and Spring Kit 28.SIS1337-2Replaces 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...09261459- SKU:
- 09261459
- Availability:
- Ships Same Business Day
- Weight:
- 0.29 LBS
- PRODUCT NAME:
- SPRING KIT
- TYPE:
- VALVE
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- INTAKE
- UNITS:
- KIT
$161.82 -
PROX Intake Valve and Spring Kit 28.SIS3338-2
PROX
$161.82PROX Intake Valve and Spring Kit 28.SIS3338-2Replaces 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...09261461- SKU:
- 09261461
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- APPLICATION:
- INTAKE
- PRODUCT NAME:
- SPRING KIT
- TYPE:
- VALVE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- MATERIAL:
- TI-STEEL
$161.82 -
PROX Valve and Spring Kit 28.SIS4335-2
PROX
$161.82PROX Valve and Spring Kit 28.SIS4335-2Replaces 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...09261462- SKU:
- 09261462
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- TYPE:
- VALVE
- MATERIAL:
- STEEL
- APPLICATION:
- INTAKE
- PRODUCT NAME:
- SPRING KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$161.82 -
PROX Valve and Spring Kit 28.SIS4336-2
PROX
$161.82PROX Valve and Spring Kit 28.SIS4336-2Replaces 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...09261463- SKU:
- 09261463
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- PRODUCT NAME:
- SPRING KIT
- TYPE:
- VALVE
- APPLICATION:
- INTAKE
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$161.82 -
PROX Valve and Spring Kit 28.SIS4338-2
PROX
$161.82PROX Valve and Spring Kit 28.SIS4338-2Replaces 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...09261464- SKU:
- 09261464
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- TYPE:
- VALVE
- PRODUCT NAME:
- SPRING KIT
- UNITS:
- KIT
- APPLICATION:
- INTAKE
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
$161.82 -
PROX Valve and Spring Kit 28.SIS4341-2
PROX
$161.82PROX Valve and Spring Kit 28.SIS4341-2Replaces 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...09261465- SKU:
- 09261465
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- APPLICATION:
- INTAKE
- PRODUCT NAME:
- SPRING KIT
- TYPE:
- VALVE
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$161.82 -
PROX Exhaust Valve 28.1340-1
PROX
$44.95PROX Exhaust Valve 28.1340-1Manufactured to the highest precision and quality, Constructed to meet OEM specifications, Available in standard sizes only09261419- SKU:
- 09261419
- Availability:
- Ships Same Business Day
- Weight:
- 0.07 LBS
- MATERIAL:
- STEEL
- APPLICATION:
- EXHAUST
- PRODUCT NAME:
- VALVE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
$44.95 -
PROX Exhaust Valve 28.1409-1
PROX
$44.95PROX Exhaust Valve 28.1409-1Manufactured to the highest precision and quality, Constructed to meet OEM specifications, Available in standard sizes only09261421- SKU:
- 09261421
- Availability:
- Ships Same Business Day
- Weight:
- 0.09 LBS
- APPLICATION:
- EXHAUST
- PRODUCT NAME:
- VALVE
- UNITS:
- EACH
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
$44.95 -
PROX Valve and Spring Kit 28.SES2440-1
PROX
$157.34PROX Valve and Spring Kit 28.SES2440-1Replaces 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...09261427- SKU:
- 09261427
- Availability:
- Ships Same Business Day
- Weight:
- 0.24 LBS
- APPLICATION:
- EXHAUST
- PRODUCT NAME:
- SPRING KIT
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- VALVE
$157.34 -
PROX Valve and Spring Kit 28.SES6327-1
PROX
$161.82PROX Valve and Spring Kit 28.SES6327-1Replaces 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...09261429- SKU:
- 09261429
- Availability:
- Ships Same Business Day
- Weight:
- 0.26 LBS
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- APPLICATION:
- EXHAUST
- PRODUCT NAME:
- SPRING KIT
- TYPE:
- VALVE
$161.82 -
PROX Valve and Spring Kit 28.SES6329-1
PROX
$161.82PROX Valve and Spring Kit 28.SES6329-1Replaces 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...09261430- SKU:
- 09261430
- Availability:
- Ships Same Business Day
- Weight:
- 0.24 LBS
- APPLICATION:
- EXHAUST
- TYPE:
- VALVE
- PRODUCT NAME:
- SPRING KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- MATERIAL:
- STEEL
$161.82 -
PROX Valve and Spring Kit 28.SIS1409-2
PROX
$157.34PROX Valve and Spring Kit 28.SIS1409-2Replaces 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...09261431- SKU:
- 09261431
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- APPLICATION:
- INTAKE
- PRODUCT NAME:
- SPRING KIT
- TYPE:
- VALVE
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$157.34
