Dirt Bike Engine
Discover a full range of dirt bike engine components for rebuilding or upgrading your performance. From crankshafts to cylinder heads and piston kits, these precision-engineered components ensure reliable performance. For additional upgrades, check out our full selection of off-road dirt bike parts.
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
-
PROX Valve and Spring Kit 28.SIS4409-2
PROX
$159.95PROX 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...09261033- SKU:
- 09261033
- 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
$159.95 -
PROX Valve and Spring Kit 28.SES4409-1
PROX
$159.95PROX 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...09261034- SKU:
- 09261034
- 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
$159.95 -
PROX Valve and Spring Kit 28.SIS3405-2
PROX
$139.95PROX 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...09261035- SKU:
- 09261035
- 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
$139.95 -
PROX Valve and Spring Kit 28.SES3405-1
PROX
$139.95PROX 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...09261036- SKU:
- 09261036
- 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
$139.95 -
PROX Valve and Spring Kit 28.SIS3407-2
PROX
$139.95PROX 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...09261037- SKU:
- 09261037
- 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
$139.95 -
PROX Valve and Spring Kit 28.SES3407-1
PROX
$139.95PROX 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...09261038- SKU:
- 09261038
- 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
$139.95 -
PROX Valve and Spring Kit 28.SIS3408-2
PROX
$139.95PROX 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...09261039- SKU:
- 09261039
- 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
$139.95 -
PROX Valve and Spring Kit 28.SES3408-1
PROX
$139.95PROX 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...09261040- SKU:
- 09261040
- 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
$139.95 -
PROX Exhaust Valve 28.1070-1
PROX
$24.95PROX Exhaust Valve 28.1070-1Manufactured to the highest precision and quality, Constructed to meet OEM specifications, Available in standard sizes only09260664- SKU:
- 09260664
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- APPLICATION:
- EXHAUST
- MATERIAL:
- STEEL
- PRODUCT NAME:
- VALVE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
$24.95 -
PROX Intake Valve 28.1070-2
PROX
$14.95PROX Intake Valve 28.1070-2Manufactured to the highest precision and quality, Constructed to meet OEM specifications, Available in standard sizes only09260665- SKU:
- 09260665
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- INTAKE
- MATERIAL:
- STEEL
- PRODUCT NAME:
- VALVE
- UNITS:
- EACH
$14.95 -
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 only09260666- SKU:
- 09260666
- 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
$19.95PROX Intake Valve 28.1226-2Manufactured to the highest precision and quality, Constructed to meet OEM specifications, Available in standard sizes only09260667- SKU:
- 09260667
- Availability:
- Ships Same Business Day
- Weight:
- 0.09 LBS
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- VALVE
- APPLICATION:
- INTAKE
- UNITS:
- EACH
$19.95 -
PROX Exhaust Valve 28.1227-1
PROX
$29.95PROX Exhaust Valve 28.1227-1Manufactured to the highest precision and quality, Constructed to meet OEM specifications, Available in standard sizes only09260668- SKU:
- 09260668
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- UNITS:
- EACH
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- EXHAUST
- PRODUCT NAME:
- VALVE
$29.95 -
PROX Intake Valve 28.1227-2
PROX
$19.95PROX Intake Valve 28.1227-2Manufactured to the highest precision and quality, Constructed to meet OEM specifications, Available in standard sizes only09260669- SKU:
- 09260669
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- RIDING STYLE:
- OFF-ROAD
- MATERIAL:
- STEEL
- PRODUCT NAME:
- VALVE
- APPLICATION:
- INTAKE
- UNITS:
- EACH
$19.95 -
PROX Exhaust Valve 28.1323-1
PROX
$29.95PROX Exhaust Valve 28.1323-1Manufactured to the highest precision and quality, Constructed to meet OEM specifications, Available in standard sizes only09260670- SKU:
- 09260670
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- EXHAUST
- PRODUCT NAME:
- VALVE
- UNITS:
- EACH
$29.95 -
PROX Intake Valve 28.1323-2
PROX
$19.95PROX Intake Valve 28.1323-2Manufactured to the highest precision and quality, Constructed to meet OEM specifications, Available in standard sizes only09260671- SKU:
- 09260671
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- INTAKE
- MATERIAL:
- STEEL
- PRODUCT NAME:
- VALVE
- UNITS:
- EACH
$19.95 -
PROX Exhaust Valve 28.1338-1
PROX
$39.95PROX Exhaust Valve 28.1338-1Manufactured to the highest precision and quality, Constructed to meet OEM specifications, Available in standard sizes only09260672- SKU:
- 09260672
- Availability:
- Ships Same Business Day
- Weight:
- 0.07 LBS
- MATERIAL:
- STEEL
- PRODUCT NAME:
- VALVE
- UNITS:
- EACH
- APPLICATION:
- EXHAUST
- RIDING STYLE:
- OFF-ROAD
$39.95 -
PROX Exhaust Valve 28.1381-1
PROX
$29.95PROX Exhaust Valve 28.1381-1Manufactured to the highest precision and quality, Constructed to meet OEM specifications, Available in standard sizes only09260675- SKU:
- 09260675
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- PRODUCT NAME:
- VALVE
- APPLICATION:
- EXHAUST
$29.95 -
PROX Intake Valve 28.1381-2
PROX
$19.95PROX 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
$19.95 -
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
