Dirt Bike Engine
Dirt Bike Engine Parts at JJ Motorsports
Discover a full range of dirt bike engine components for rebuilding or upgrading your performance from JJ Motorsports. 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 to keep your engine running at peak efficiency on the track or trails.
Shop trusted brands like Wiseco for forged piston kits and K&N for high-flow oil filters. Explore related categories such as Dirt Bike Air and Fuel for intake upgrades or Dirt Bike Exhaust for complete systems.
Browse our in-stock inventory below with same-day shipping and expert support. Questions? Contact us for fitment advice!
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
-
JE PISTONS Piston Kit - 14.5:1 - Kawasaki 391920
JE PISTONS
$301.06Piston Kit - 14.5:1 - Kawasaki Machined from 2618-T6 high-tensile forged aluminum, Dome/dish features smooth flowing radii; requires no deburring or preparation, Specifically engineered for extreme applications including professional competition, Pro...09106680- SKU:
- 09106680
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- RIDING STYLE:
- OFF-ROAD
- COMPRESSION RATIO IMPERIAL:
- 14.5:1
- PRODUCT NAME:
- PISTON KIT
- UNITS:
- KIT
$301.06 -
ATHENA Piston Kit with Gaskets - 95.97 mm - KX450F P5F0960072007A
ATHENA
$263.07Piston Kit with Gaskets - 95.97 mm High-performance aluminum alloy construction for enhanced durability. Designed specifically for KX450F 4-stroke Off-Road motorcycles. Smooth profile for optimal flow and flame propagation. Manufactured...09031750- SKU:
- 09031750
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- BORE SIZE METRIC:
- 95.97 MM
- DISPLACEMENT:
- 450 CC
- TYPE:
- TOP END
- COMPRESSION RATIO IMPERIAL:
- 12.5:1
- MODEL:
- A
- PRODUCT NAME:
- PISTON KIT
$263.07 -
ATHENA Piston Kit with Gaskets - 95.95 mm - CRF450R P5F0960322006A
ATHENA
$259.07Piston Kit with Gaskets - 95.95 mm High-performance aluminum alloy construction for enhanced durability. Designed for CRF450R, ensuring a perfect fit and reliability. Features a smooth profile for optimal flow and flame propagation. Manufactured using...09031744- SKU:
- 09031744
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- BORE SIZE METRIC:
- 95.95 MM
- DISPLACEMENT:
- 450 CC
- PRODUCT NAME:
- PISTON KIT
- COMPRESSION RATIO IMPERIAL:
- 13.5:1
- PISTON MATERIAL:
- FORGED
- UNITS:
- KIT
- ENGINE TYPE:
- 4-STROKE
- MODEL:
- A
- PISTON MATERIAL:
- ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
$259.07 -
ATHENA Piston Kit with Gaskets - 95.96 mm - CRF450R P5F0960322006B
ATHENA
$259.07Piston Kit with Gaskets - 95.96 mm - CRF450R Made of high-performance aluminum alloy with high silicon content that guarantee the same reliability of the OE piston, while at the same time providing greater resistance and excellent performance, The smooth...09031745- SKU:
- 09031745
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- BORE SIZE METRIC:
- 95.96 MM
- COMPRESSION RATIO IMPERIAL:
- 13.5:1
- MODEL:
- B
- PRODUCT NAME:
- PISTON KIT
- DISPLACEMENT:
- 450 CC
- TYPE:
- TOP END
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
$259.07 -
ATHENA Piston Kit with Gaskets - 95.95 mm - CRF450R P5F0960320006A
ATHENA
$261.07Piston Kit with Gaskets - 95.95 mm High-performance aluminum alloy construction for enhanced durability. Designed for CRF450R, ensuring a perfect fit and reliability. Features a smooth profile for optimal flow and flame propagation. Manufactured using...09031746- SKU:
- 09031746
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- BORE SIZE METRIC:
- 95.95 MM
- PRODUCT NAME:
- PISTON KIT
- COMPRESSION RATIO IMPERIAL:
- 13.5:1
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- MODEL:
- A
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- DISPLACEMENT:
- 450 CC
- TYPE:
- TOP END
$261.07 -
ATHENA Piston Kit with Gaskets - 95.96 mm - CRF450R P5F0960320006B
ATHENA
$261.07Piston Kit with Gaskets - 95.96 mm High-performance aluminum alloy construction for enhanced durability. Designed specifically for CRF450R to ensure perfect compatibility. Advanced smooth profile for optimal airflow and flame propagation. ...09031747- SKU:
- 09031747
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- COMPRESSION RATIO IMPERIAL:
- 13.5:1
- PISTON MATERIAL:
- FORGED
- BORE SIZE METRIC:
- 95.96 MM
- DISPLACEMENT:
- 450 CC
- MODEL:
- B
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- KIT
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON KIT
$261.07 -
ATHENA Piston Kit with Gaskets - 95.97 mm - KX450F P5F0960068007A
ATHENA
$265.02Piston Kit with Gaskets - 95.97 mm High-performance aluminum alloy construction for enhanced durability. Designed specifically for KX450F 4-stroke Off-Road motorcycles. Smooth profile for optimal flow and flame propagation. Manufactured...09031752- SKU:
- 09031752
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- COMPRESSION RATIO IMPERIAL:
- 12.5:1
- ENGINE TYPE:
- 4-STROKE
- MODEL:
- A
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- DISPLACEMENT:
- 450 CC
- PRODUCT NAME:
- PISTON KIT
- BORE SIZE METRIC:
- 95.97 MM
- TYPE:
- TOP END
$265.02 -
ATHENA Piston Kit with Gaskets - 95.98 mm - KX450F P5F0960068007B
ATHENA
$265.02Piston Kit with Gaskets - 95.98 mm High-performance aluminum alloy construction for enhanced durability. Designed for 4-stroke Off-Road motorcycles, ensuring optimal performance. Smooth profile for improved flow and flame propagation. ...09031753- SKU:
- 09031753
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- COMPRESSION RATIO IMPERIAL:
- 12.5:1
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- DISPLACEMENT:
- 450 CC
- TYPE:
- TOP END
- MODEL:
- B
- PRODUCT NAME:
- PISTON KIT
- BORE SIZE METRIC:
- 95.98 MM
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
$265.02 -
ATHENA Piston Kit with Gaskets - 95.95 mm - KX450F P5F0960066002A
ATHENA
$273.07Piston Kit with Gaskets - 95.95 mm - KX450F Made of high-performance aluminum alloy with high silicon content that guarantee the same reliability of the OE piston, while at the same time providing greater resistance and excellent performance, The smooth...09031754- SKU:
- 09031754
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- COMPRESSION RATIO IMPERIAL:
- 12.5:1
- MODEL:
- A
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- BORE SIZE METRIC:
- 95.95 MM
- PRODUCT NAME:
- PISTON KIT
- DISPLACEMENT:
- 450 CC
- TYPE:
- TOP END
$273.07 -
ATHENA Piston Kit with Gaskets - 94.95 mm - SXF450 P5F0950081002A
ATHENA
$279.95Piston Kit with Gaskets - 94.95 mm - SXF450 Made of high-performance aluminum alloy with high silicon content that guarantee the same reliability of the OE piston, while at the same time providing greater resistance and excellent performance, The smooth...09031756- SKU:
- 09031756
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- BORE SIZE METRIC:
- 94.95 MM
- TYPE:
- TOP END
- UNITS:
- KIT
- ENGINE TYPE:
- 4-STROKE
- MODEL:
- A
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON KIT
- COMPRESSION RATIO IMPERIAL:
- 12.8:1
- PISTON MATERIAL:
- FORGED
- DISPLACEMENT:
- 449 CC
- RIDING STYLE:
- OFF-ROAD
$279.95 -
ATHENA Piston Kit with Gaskets - 94.95 mm - SXF450 P5F0950081001A
ATHENA
$265.95Piston Kit with Gaskets - 94.95 mm - SXF450 Made of high-performance aluminum alloy with high silicon content that guarantee the same reliability of the OE piston, while at the same time providing greater resistance and excellent performance, The smooth...09031758- SKU:
- 09031758
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- DISPLACEMENT:
- 450 CC
- TYPE:
- TOP END
- BORE SIZE METRIC:
- 94.95 MM
- MODEL:
- A
- PRODUCT NAME:
- PISTON KIT
- COMPRESSION RATIO IMPERIAL:
- 12.6:1
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$265.95 -
ATHENA Piston Kit with Gaskets - 94.96 mm - SXF450 P5F0950081001B
ATHENA
$279.95Piston Kit with Gaskets - 94.96 mm High-performance aluminum alloy construction for enhanced durability. Designed with high silicon content for improved reliability. Smooth profile for optimal airflow and flame propagation. Manufactured...09031759- SKU:
- 09031759
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- BORE SIZE METRIC:
- 94.96 MM
- DISPLACEMENT:
- 450 CC
- MODEL:
- B
- PRODUCT NAME:
- PISTON KIT
- PISTON MATERIAL:
- FORGED
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- COMPRESSION RATIO IMPERIAL:
- 12.6:1
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- TYPE:
- TOP END
$279.95 -
ATHENA Piston Kit with Gaskets - 87.96 mm - SXF350 P5F0880090001B
ATHENA
$257.02Piston Kit with Gaskets - 87.96 mm - SXF350 Made of high-performance aluminum alloy with high silicon content that guarantee the same reliability of the OE piston, while at the same time providing greater resistance and excellent performance, The smooth...09031761- SKU:
- 09031761
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- PISTON KIT
- BORE SIZE METRIC:
- 87.96 MM
- COMPRESSION RATIO IMPERIAL:
- 14.2:1
- DISPLACEMENT:
- 349 CC
- TYPE:
- TOP END
- MODEL:
- B
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$257.02Qty in Cart: 0Quantity:Price:$257.02Subtotal: -
ATHENA Piston Kit with Gaskets - 87.95 mm - SXF350 P5F0880079001A
ATHENA
$295.95Piston Kit with Gaskets - 87.95 mm - SXF350 Made of high-performance aluminum alloy with high silicon content that guarantee the same reliability of the OE piston, while at the same time providing greater resistance and excellent performance, The smooth...09031762- SKU:
- 09031762
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PISTON MATERIAL:
- FORGED
- RIDING STYLE:
- STREET
- BORE SIZE METRIC:
- 87.95 MM
- RIDING STYLE:
- OFF-ROAD
- COMPRESSION RATIO IMPERIAL:
- 14.2:1
- TYPE:
- TOP END
- UNITS:
- KIT
- DISPLACEMENT:
- 349 CC
- ENGINE TYPE:
- 4-STROKE
- MODEL:
- A
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON KIT
$295.95 -
ATHENA Piston Kit with Gaskets - 87.96 mm - SXF350 P5F0880079001B
ATHENA
$311.02Piston Kit with Gaskets - 87.96 mm - SXF350 High-performance aluminum alloy construction for enhanced durability. Designed for 4-stroke Off-Road motorcycles, ensuring optimal performance. Precision-engineered using CNC machines for superior...09031763- SKU:
- 09031763
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- COMPRESSION RATIO IMPERIAL:
- 14.2:1
- DISPLACEMENT:
- 349 CC
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- BORE SIZE METRIC:
- 87.96 MM
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- KIT
- MODEL:
- B
$311.02 -
ATHENA Piston Kit with Gaskets - 95.96 mm - RMZ450 P5F0960061004B
ATHENA
$283.95Piston Kit with Gaskets - 95.96 mm - RMZ450 Made of high-performance aluminum alloy with high silicon content that guarantee the same reliability of the OE piston, while at the same time providing greater resistance and excellent performance, The smooth...09031765- SKU:
- 09031765
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- BORE SIZE METRIC:
- 95.96 MM
- DISPLACEMENT:
- 450 CC
- MODEL:
- B
- PRODUCT NAME:
- PISTON KIT
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- COMPRESSION RATIO IMPERIAL:
- 12.5:1
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- TOP END
$283.95 -
ATHENA Piston Kit with Gaskets - 96.95 mm - YZ450F P5F0970213005A
ATHENA
$249.95Piston Kit with Gaskets - 96.95 mm - YZ450F Made of high-performance aluminum alloy with high silicon content that guarantee the same reliability of the OE piston, while at the same time providing greater resistance and excellent performance, The smooth...09031766- SKU:
- 09031766
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- BORE SIZE METRIC:
- 96.95 MM
- PRODUCT NAME:
- PISTON KIT
- COMPRESSION RATIO IMPERIAL:
- 13.7:1
- TYPE:
- TOP END
- ENGINE TYPE:
- 4-STROKE
- MODEL:
- A
- PISTON MATERIAL:
- ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- DISPLACEMENT:
- 449 CC
- PISTON MATERIAL:
- FORGED
- UNITS:
- KIT
$249.95 -
ATHENA Piston Kit with Gaskets - 96.96 mm - YZ450F P5F0970213005B
ATHENA
$249.95Piston Kit with Gaskets - 96.96 mm - YZ450F High-performance aluminum alloy construction for enhanced reliability. Designed with high silicon content for superior resistance and performance. Smooth profile ensures optimal flow and flame...09031767- SKU:
- 09031767
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- COMPRESSION RATIO IMPERIAL:
- 13.7:1
- MODEL:
- B
- DISPLACEMENT:
- 449 CC
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- BORE SIZE METRIC:
- 96.96 MM
- PRODUCT NAME:
- PISTON KIT
- TYPE:
- TOP END
$249.95 -
ATHENA Piston Kit with Gaskets - 96.95 mm - YZ450F P5F0970197004A
ATHENA
$242.15Piston Kit with Gaskets - 96.95 mm - YZ450F Made of high-performance aluminum alloy with high silicon content that guarantee the same reliability of the OE piston, while at the same time providing greater resistance and excellent performance, The smooth...09031768- SKU:
- 09031768
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- TYPE:
- TOP END
- BORE SIZE METRIC:
- 96.95 MM
- ENGINE TYPE:
- 4-STROKE
- MODEL:
- A
- PRODUCT NAME:
- PISTON KIT
- COMPRESSION RATIO IMPERIAL:
- 12.8:1
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- DISPLACEMENT:
- 450 CC
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$242.15 -
Hinson Racing Clutch Cover KTM 250 SX 2018-2022 C700-1801
HINSON RACING
$169.99Upgrade your ride with our premium Clutch Cover designed specifically for KTM, Husqvarna, and Gas Gas models. Engineered for optimal heat dissipation and enhanced durability, this clutch cover is the perfect choice for serious racers and enthusiasts...09402142- SKU:
- 09402142
- Availability:
- Ships Same Business Day
- Weight:
- 7.20 LBS
- MATERIAL:
- T-6 ALUMINUM
- COLOR/FINISH:
- BLACK
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- STREET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CLUTCH
- UNITS:
- EACH
$169.99
