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 and Spring Kit 28.SIS1340-2
PROX
$161.83PROX Intake Valve and Spring Kit 28.SIS1340-2Replaces 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...09262892- SKU:
- 09262892
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- VALVE AND SPRING KIT
$161.83 -
PROX Valve and Spring Kit 28.SES2414-1
PROX
$161.82PROX Valve and Spring Kit 28.SES2414-1Replaces 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...09262724- SKU:
- 09262724
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- APPLICATION:
- EXHAUST
- PRODUCT NAME:
- VALVE AND SPRING KIT
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- VALVE
- UNITS:
- KIT
$161.82 -
PROX Valve and Spring Kit 28.SES2444-1
PROX
$174.82PROX Valve and Spring Kit 28.SES2444-1Replaces 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...09262725- SKU:
- 09262725
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- APPLICATION:
- EXHAUST
- PRODUCT NAME:
- SPRING KIT
- UNITS:
- KIT
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- VALVE
$174.82 -
PROX Valve and Spring Kit 28.SES6351-1
PROX
$161.82PROX Valve and Spring Kit 28.SES6351-1Replaces 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...09262726- SKU:
- 09262726
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- APPLICATION:
- EXHAUST
- PRODUCT NAME:
- SPRING KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- MATERIAL:
- STEEL
- TYPE:
- VALVE
$161.82 -
PROX Valve and Spring Kit 28.SES6353-1
PROX
$161.82PROX Valve and Spring Kit 28.SES6353-1Replaces 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...09262727- SKU:
- 09262727
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- VALVE
- UNITS:
- KIT
- APPLICATION:
- EXHAUST
- PRODUCT NAME:
- SPRING KIT
$161.82 -
PROX Valve and Spring Kit 28.SIS2414-2
PROX
$161.82PROX Valve and Spring Kit 28.SIS2414-2Replaces 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...09262728- SKU:
- 09262728
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- APPLICATION:
- INTAKE
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- VALVE
- PRODUCT NAME:
- VALVE AND SPRING KIT
- UNITS:
- KIT
$161.82 -
PROX Valve and Spring Kit 28.SIS2444-2
PROX
$174.82PROX Valve and Spring Kit 28.SIS2444-2Replaces 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...09262729- SKU:
- 09262729
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- APPLICATION:
- INTAKE
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- VALVE
- PRODUCT NAME:
- VALVE AND SPRING KIT
- UNITS:
- KIT
$174.82 -
PROX Valve and Spring Kit 28.SIS6351-2
PROX
$161.82PROX Valve and Spring Kit 28.SIS6351-2Replaces 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...09262730- SKU:
- 09262730
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- PRODUCT NAME:
- VALVE AND SPRING KIT
- APPLICATION:
- INTAKE
- TYPE:
- VALVE
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$161.82 -
PROX Valve and Spring Kit 28.SIS6353-2
PROX
$161.82PROX Valve and Spring Kit 28.SIS6353-2Replaces 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...09262731- SKU:
- 09262731
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- APPLICATION:
- INTAKE
- MATERIAL:
- STEEL
- TYPE:
- VALVE
- PRODUCT NAME:
- VALVE AND SPRING KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$161.82 -
PROX Exhaust Valve 28.1334-1
PROX
$40.34PROX Exhaust Valve 28.1334-1Manufactured to the highest precision and quality, Constructed to meet OEM specifications, Available in standard sizes only09260143- SKU:
- 09260143
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- PRODUCT NAME:
- VALVE
- UNITS:
- EACH
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- EXHAUST
$40.34 -
PROX Exhaust Valve 28.1402-1
PROX
$40.34PROX Exhaust Valve 28.1402-1Manufactured to the highest precision and quality, Constructed to meet OEM specifications, Available in standard sizes only09260144- SKU:
- 09260144
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- APPLICATION:
- EXHAUST
- PRODUCT NAME:
- VALVE
- UNITS:
- EACH
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
$40.34 -
PROX Exhaust Valve 28.1495-1
PROX
$37.18PROX Exhaust Valve 28.1495-1Manufactured to the highest precision and quality, Constructed to meet OEM specifications, Available in standard sizes only09260145- SKU:
- 09260145
- Availability:
- Ships Same Business Day
- Weight:
- 0.12 LBS
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- MATERIAL:
- STEEL
- PRODUCT NAME:
- VALVE
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- EXHAUST
$37.18 -
PROX Exhaust Valve 28.1654-1
PROX
$54.95PROX Exhaust Valve 28.1654-1Manufactured to the highest precision and quality, Constructed to meet OEM specifications, Available in standard sizes only09260146- SKU:
- 09260146
- Availability:
- Ships Same Business Day
- Weight:
- 0.12 LBS
- RIDING STYLE:
- OFF-ROAD
- MATERIAL:
- STEEL
- PRODUCT NAME:
- VALVE
- UNITS:
- EACH
- APPLICATION:
- EXHAUST
$54.95 -
PROX Exhaust Valve 28.3402-1
PROX
$37.18PROX Exhaust Valve 28.3402-1Manufactured to the highest precision and quality, Constructed to meet OEM specifications, Available in standard sizes only09260147- SKU:
- 09260147
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- APPLICATION:
- EXHAUST
- PRODUCT NAME:
- VALVE
$37.18 -
PROX Exhaust Valve 28.2418-1
PROX
$29.95PROX Exhaust Valve 28.2418-1Manufactured to the highest precision and quality, Constructed to meet OEM specifications, Available in standard sizes only09260148- SKU:
- 09260148
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- APPLICATION:
- EXHAUST
- PRODUCT NAME:
- VALVE
$29.95 -
PROX Intake Valve 28.1495-2
PROX
$26.92PROX Intake Valve 28.1495-2Manufactured to the highest precision and quality, Constructed to meet OEM specifications, Available in standard sizes only09260149- SKU:
- 09260149
- Availability:
- Ships Same Business Day
- Weight:
- 0.12 LBS
- APPLICATION:
- INTAKE
- MATERIAL:
- STEEL
- PRODUCT NAME:
- VALVE
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
$26.92 -
PROX Intake Valve 28.1654-2
PROX
$37.18PROX Intake Valve 28.1654-2Manufactured to the highest precision and quality, Constructed to meet OEM specifications, Available in standard sizes only09260150- SKU:
- 09260150
- Availability:
- Ships Same Business Day
- Weight:
- 0.12 LBS
- APPLICATION:
- INTAKE
- MATERIAL:
- STEEL
- PRODUCT NAME:
- VALVE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
$37.18 -
PROX Intake Valve 28.3402-2
PROX
$30.77PROX Intake Valve 28.3402-2Manufactured to the highest precision and quality, Constructed to meet OEM specifications, Available in standard sizes only09260151- SKU:
- 09260151
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- APPLICATION:
- INTAKE
- MATERIAL:
- STEEL
- PRODUCT NAME:
- VALVE
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
$30.77 -
PROX Intake Valve 28.2418-3
PROX
$21.78PROX Intake Valve 28.2418-3Manufactured to the highest precision and quality, Constructed to meet OEM specifications, Available in standard sizes only09260153- SKU:
- 09260153
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- APPLICATION:
- INTAKE
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- PRODUCT NAME:
- VALVE
$21.78 -
PROX Valve Shims - 5 pack 29.748120
PROX
$9.95PROX Valve Shims 5 pack 29.748120Made using a specific heat-treatment to ensure hardness for maximum durability and less wear, Precision machined to match exact size, Inexpensive and easy replacement for expensive OEM shims09260870- SKU:
- 09260870
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
- OUTSIDE DIAMETER METRIC:
- 7.48 MM
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- SHIM KIT
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- UTV
- RIDING STYLE:
- WATERCRAFT
- UNITS:
- 5 PACK
- VALVE SHIM THICKNESS METRIC:
- 1.20 MM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- VALVE
$9.95
