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
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JE PISTONS Piston Kit 180297
JE PISTONS
$269.99When you're pushing your engine to its absolute limits, your pistons need to withstand extreme pressures and temperatures without compromise. JE PISTONS' Pro Series 180297 kit is engineered...09105842- SKU:
- 09105842
- Availability:
- Ships Same Business Day
- Weight:
- 1.16 LBS
- BORE - OVERSIZE:
- STANDARD
- DISPLACEMENT:
- 398 CC
- RIDING STYLE:
- ATV
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- STYLE:
- JE PISTON
- BORE - OVERSIZE METRIC:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 12.0:1
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- ROUND FORGED DESIGN
- UNITS:
- KIT
- BORE SIZE METRIC:
- 90.00 MM
- PISTON HEAD SHAPE:
- DISHED
- PRODUCT NAME:
- PISTON KIT
$269.99 -
JE PISTONS Piston Kit 183051
JE PISTONS
$269.99When you're pushing your engine to the absolute limit in competition, your pistons need to handle extreme pressures and temperatures without compromise. JE PISTONS' Pro Series kit delivers the...09105843- SKU:
- 09105843
- Availability:
- Ships Same Business Day
- Weight:
- 1.41 LBS
- BORE SIZE METRIC:
- 94.00 MM
- COMPRESSION RATIO IMPERIAL:
- 12.0:1
- RIDING STYLE:
- ATV
- BORE - OVERSIZE METRIC:
- +4.00 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- PRODUCT NAME:
- PISTON KIT
- STYLE:
- JE PISTON
- BORE - OVERSIZE:
- +4,00 MM
- DISPLACEMENT:
- 434 CC
- PISTON HEAD SHAPE:
- DISHED
- TYPE:
- ROUND FORGED DESIGN
$269.99Qty in Cart: 0Quantity:Price:$269.99Subtotal: -
JE PISTONS Piston Kit 209283
JE PISTONS
$309.99When you're pushing your engine to its absolute limit in competition, your pistons need to survive extreme pressure, heat, and detonation without compromise. JE PISTONS Pro Series delivers the...09105844- SKU:
- 09105844
- Availability:
- Ships Same Business Day
- Weight:
- 1.41 LBS
- WALL THICKNESS:
- 0,150'
- BORE SIZE METRIC:
- 100.00 MM
- DISPLACEMENT:
- 651 CC
- UNITS:
- KIT
- COMPRESSION RATIO IMPERIAL:
- 11.5:1
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- ATV
- PISTON HEAD SHAPE:
- DOMED
- WALL THICKNESS IMPERIAL:
- 0.150'
$309.99Qty in Cart: 0Quantity:Price:$309.99Subtotal: -
JE PISTONS Piston Kit 209292
JE PISTONS
$309.99When you're pushing your engine to the limit in competition, your pistons need to withstand extreme pressures and temperatures without compromise. JE PISTONS' Pro Series 209292 kit delivers the...09105845- SKU:
- 09105845
- Availability:
- Ships Same Business Day
- Weight:
- 1.11 LBS
- COMPRESSION RATIO IMPERIAL:
- 12.0:1
- WALL THICKNESS:
- 0,120'
- BORE SIZE METRIC:
- 85.00 MM
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- ATV
- WALL THICKNESS IMPERIAL:
- 0.120'
- DISPLACEMENT:
- 366 CC
- PISTON HEAD SHAPE:
- DOMED
- UNITS:
- KIT
$309.99Qty in Cart: 0Quantity:Price:$309.99Subtotal: -
JE PISTONS Piston Kit 221767
JE PISTONS
$309.99When you're pushing your engine to its limits in competition or extreme performance applications, your pistons need to handle tremendous combustion pressures and thermal stress without compromise. JE...09105846- SKU:
- 09105846
- Availability:
- Ships Same Business Day
- Weight:
- 1.41 LBS
- DISPLACEMENT:
- 449 CC
- BORE SIZE METRIC:
- 94.00 MM
- COMPRESSION RATIO IMPERIAL:
- 13.0:1
- WALL THICKNESS:
- 0,150'
- WALL THICKNESS IMPERIAL:
- 0.150'
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- ATV
- PISTON HEAD SHAPE:
- DOMED
- UNITS:
- KIT
$309.99 -
JE PISTONS Piston Kit 221771
JE PISTONS
$309.99When you're pushing your engine to its limits in competition, your pistons need to survive extreme conditions without compromise. JE PISTONS' 221771 kit delivers the durability and precision required...09105847- SKU:
- 09105847
- Availability:
- Ships Same Business Day
- Weight:
- 1.46 LBS
- COMPRESSION RATIO IMPERIAL:
- 11.5:1
- DISPLACEMENT:
- 449 CC
- PRODUCT NAME:
- PISTON KIT
- PISTON HEAD SHAPE:
- DOMED
- RIDING STYLE:
- ATV
- BORE SIZE METRIC:
- 94.00 MM
- WALL THICKNESS:
- 0,150'
- WALL THICKNESS IMPERIAL:
- 0.150'
- UNITS:
- KIT
$309.99Qty in Cart: 0Quantity:Price:$309.99Subtotal: -
JE PISTONS Piston Kit 221795
JE PISTONS
$309.99When you're pushing your engine to the absolute limit—whether on the track or in extreme competition—your pistons need to handle forces that demand uncompromising engineering. JE PISTONS' 221795 Pro...09105848- SKU:
- 09105848
- Availability:
- Ships Same Business Day
- Weight:
- 1.46 LBS
- BORE SIZE METRIC:
- 95.00 MM
- COMPRESSION RATIO IMPERIAL:
- 13.5:1
- PRODUCT NAME:
- PISTON KIT
- WALL THICKNESS:
- 0,160'
- WALL THICKNESS IMPERIAL:
- 0.160'
- PISTON HEAD SHAPE:
- DOMED
- DISPLACEMENT:
- 439 CC
- RIDING STYLE:
- ATV
- UNITS:
- KIT
$309.99Qty in Cart: 0Quantity:Price:$309.99Subtotal: -
JE PISTONS Piston Kit 222085
JE PISTONS
$269.99When you're pushing your engine to the absolute limit in competition, your pistons need to survive extreme pressures and temperatures without compromise. JE Pistons 222085 Pro Series delivers the...09105849- SKU:
- 09105849
- Availability:
- Ships Same Business Day
- Weight:
- 1.01 LBS
- BORE SIZE METRIC:
- 85.00 MM
- PRODUCT NAME:
- PISTON KIT
- PISTON HEAD SHAPE:
- DOMED
- UNITS:
- KIT
- COMPRESSION RATIO IMPERIAL:
- 10.5:1
- WALL THICKNESS:
- 0,120'
- DISPLACEMENT:
- 366 CC
- RIDING STYLE:
- ATV
- WALL THICKNESS IMPERIAL:
- 0.120'
$269.99Qty in Cart: 0Quantity:Price:$269.99Subtotal: -
JE PISTONS Piston Kit 222086
JE PISTONS
$309.99If you're building a competition engine that demands absolute reliability under extreme load, JE Pistons' Pro Series kit delivers the precision engineering required to survive professional racing...09105850- SKU:
- 09105850
- Availability:
- Ships Same Business Day
- Weight:
- 1.21 LBS
- RIDING STYLE:
- ATV
- PISTON HEAD SHAPE:
- FLAT TOP
- WALL THICKNESS IMPERIAL:
- 0.160'
- UNITS:
- KIT
- BORE SIZE METRIC:
- 98.00 MM
- COMPRESSION RATIO IMPERIAL:
- 13.0:1
- DISPLACEMENT:
- 468 CC
- PRODUCT NAME:
- PISTON KIT
- WALL THICKNESS:
- 0,160'
$309.99 -
JE PISTONS Piston Kit 222388
JE PISTONS
$309.99When you're pushing your engine to the absolute limit in competition, your pistons need to deliver reliability without compromise. JE PISTONS' Pro Series 222388 kit is engineered for extreme racing...09105851- SKU:
- 09105851
- Availability:
- Ships Same Business Day
- Weight:
- 1.51 LBS
- COMPRESSION RATIO IMPERIAL:
- 12.5:1
- RIDING STYLE:
- ATV
- UNITS:
- KIT
- PISTON HEAD SHAPE:
- DOMED
- BORE SIZE METRIC:
- 105.00 MM
- WALL THICKNESS:
- 0,150'
- WALL THICKNESS IMPERIAL:
- 0.150'
- DISPLACEMENT:
- 560 CC
- PRODUCT NAME:
- PISTON KIT
$309.99 -
JE PISTONS Piston Kit 247612
JE PISTONS
$309.99If you're building a competition engine that needs to survive extreme boost, high RPM, and sustained abuse, JE Pistons' Pro Series 247612 kit delivers the structural integrity and precision...09105853- SKU:
- 09105853
- Availability:
- Ships Same Business Day
- Weight:
- 1.06 LBS
- PISTON HEAD SHAPE:
- DOMED
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- JE PISTON
- TYPE:
- ROUND FORGED DESIGN
- UNITS:
- KIT
- BORE SIZE METRIC:
- 89.00 MM
- DISPLACEMENT:
- 435 CC
- BORE - OVERSIZE:
- +4,00 MM
- RIDING STYLE:
- ATV
- BORE - OVERSIZE METRIC:
- +4.00 MM
- COMPRESSION RATIO IMPERIAL:
- 10.8:1
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- PRODUCT NAME:
- PISTON KIT
$309.99 -
JE PISTONS Piston Kit 247613
JE PISTONS
$325.99Built from 2618-T6 forged aluminum and engineered for extreme competition environments, these JE Pro Series pistons deliver the precision and durability professional racers demand. The internal and...09105854- SKU:
- 09105854
- Availability:
- Ships Same Business Day
- Weight:
- 1.41 LBS
- COMPRESSION RATIO IMPERIAL:
- 12.8:1
- DISPLACEMENT:
- 449 CC
- BORE SIZE METRIC:
- 96.00 MM
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- ATV
- WALL THICKNESS:
- 0,160'
- PISTON HEAD SHAPE:
- DOMED
- UNITS:
- KIT
- WALL THICKNESS IMPERIAL:
- 0.160'
$325.99 -
JE PISTONS Piston Kit 247614
JE PISTONS
$325.99When you're pushing your engine to the absolute limit in competition, your pistons need to withstand extreme pressures and temperatures without compromise. JE PISTONS' Pro Series 247614 kit delivers...09105855- SKU:
- 09105855
- Availability:
- Ships Same Business Day
- Weight:
- 1.16 LBS
- COMPRESSION RATIO IMPERIAL:
- 13.5:1
- DISPLACEMENT:
- 449 CC
- UNITS:
- KIT
- BORE SIZE METRIC:
- 96.00 MM
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- ATV
- WALL THICKNESS:
- 0,160'
- PISTON HEAD SHAPE:
- DOMED
- WALL THICKNESS IMPERIAL:
- 0.160'
$325.99 -
JE PISTONS Piston Kit 247942
JE PISTONS
$309.99When you're pushing your engine to the absolute limit in competition or extreme applications, stock pistons simply won't cut it. JE PISTONS' 247942 kit is engineered for professional-grade...09105859- SKU:
- 09105859
- Availability:
- Ships Same Business Day
- Weight:
- 1.21 LBS
- BORE - OVERSIZE METRIC:
- +3.00 MM
- BORE SIZE METRIC:
- 98 MM
- COMPRESSION RATIO IMPERIAL:
- 13.0:1
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- PRODUCT NAME:
- PISTON KIT
- DISPLACEMENT:
- 478 CC
- TYPE:
- FORGED SIDE RELIEF DESIGN
- PISTON HEAD SHAPE:
- DISHED
- BORE - OVERSIZE:
- +3,00 MM
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- JE PISTON
- UNITS:
- KIT
$309.99Qty in Cart: 0Quantity:Price:$309.99Subtotal: -
JE PISTONS Piston Kit 247952
JE PISTONS
$309.99When you're pushing your engine to the absolute limit in professional competition, your pistons need to survive extreme combustion pressures and sustained high RPMs without compromise. JE Pistons'...09105860- SKU:
- 09105860
- Availability:
- Ships Same Business Day
- Weight:
- 1.41 LBS
- UNITS:
- KIT
- WALL THICKNESS IMPERIAL:
- 0.160'
- PISTON HEAD SHAPE:
- DISHED
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- ATV
- COMPRESSION RATIO IMPERIAL:
- 13.0:1
- DISPLACEMENT:
- 478 CC
- BORE SIZE METRIC:
- 98.00 MM
- WALL THICKNESS:
- 0,160'
$309.99 -
JE PISTONS Piston Kit 247956
JE PISTONS
$309.99When you're pushing your engine to its limits in competition, your pistons need to match your commitment. JE Pistons 247956 kits are purpose-built from 2618-T6 forged aluminum—the same material...09105861- SKU:
- 09105861
- Availability:
- Ships Same Business Day
- Weight:
- 1.41 LBS
- UNITS:
- KIT
- WALL THICKNESS IMPERIAL:
- 0.160'
- BORE SIZE METRIC:
- 95.00 MM
- PISTON HEAD SHAPE:
- DOMED
- RIDING STYLE:
- ATV
- COMPRESSION RATIO IMPERIAL:
- 13.5:1
- DISPLACEMENT:
- 449 CC
- PRODUCT NAME:
- PISTON KIT
- WALL THICKNESS:
- 0,160'
$309.99 -
JE PISTONS Piston Kit 261555
JE PISTONS
$329.99When you're pushing an engine to its absolute limit in competition, stock pistons become a liability. JE's Pro Series 261555 kit delivers the precision engineering and durability demanded by...09105871- SKU:
- 09105871
- Availability:
- Ships Same Business Day
- Weight:
- 1.41 LBS
- COMPRESSION RATIO IMPERIAL:
- 13.5:1
- DISPLACEMENT:
- 449 CC
- PRODUCT NAME:
- PISTON KIT
- WALL THICKNESS:
- 0,160'
- PISTON HEAD SHAPE:
- DOMED
- RIDING STYLE:
- ATV
- BORE SIZE METRIC:
- 95.00 MM
- UNITS:
- KIT
- WALL THICKNESS IMPERIAL:
- 0.160'
$329.99 -
JE PISTONS Piston Kit 261966
JE PISTONS
$329.99When you're pushing your engine to the absolute limit in competition, factory pistons simply won't cut it. JE PISTONS' 261966 Kit delivers the precision engineering and structural integrity that...09105872- SKU:
- 09105872
- Availability:
- Ships Same Business Day
- Weight:
- 0.96 LBS
- BORE - OVERSIZE METRIC:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 13.5:1
- DISPLACEMENT:
- 449 CC
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- RIDING STYLE:
- OFF-ROAD
- BORE - OVERSIZE:
- STANDARD
- BORE SIZE METRIC:
- 96.00 MM
- PRODUCT NAME:
- PISTON KIT
- STYLE:
- PRO SERIES
- PISTON HEAD SHAPE:
- DOMED
- TYPE:
- FORGED SIDE RELIEF DESIGN
- UNITS:
- KIT
$329.99 -
JE PISTONS Piston Kit 262279
JE PISTONS
$325.99When you're pushing your engine to the limit in competition or high-performance applications, your pistons need to handle extreme pressures and temperatures without compromise. JE PISTONS' Pro Series...09105873- SKU:
- 09105873
- Availability:
- Ships Same Business Day
- Weight:
- 0.66 LBS
- PRODUCT NAME:
- PISTON KIT
- BORE - OVERSIZE METRIC:
- STANDARD
- PISTON HEAD SHAPE:
- DOMED
- UNITS:
- KIT
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- STYLE:
- JE PISTON
- TYPE:
- FORGED SIDE RELIEF DESIGN
- BORE - OVERSIZE:
- STANDARD
- BORE SIZE METRIC:
- 66.00 MM
- COMPRESSION RATIO IMPERIAL:
- 12.5:1
- DISPLACEMENT:
- 149 CC
- RIDING STYLE:
- OFF-ROAD
$325.99 -
JE PISTONS Piston Kit 262283
JE PISTONS
$329.99When you're pushing your engine to the absolute limit in competition, your pistons need to be engineered for sustained extreme performance—not just peak power. JE PISTONS Pro Series delivers the...09105874- SKU:
- 09105874
- Availability:
- Ships Same Business Day
- Weight:
- 0.96 LBS
- BORE SIZE METRIC:
- 96.00 MM
- DISPLACEMENT:
- 449 CC
- PRODUCT NAME:
- PISTON KIT
- WALL THICKNESS:
- 0,160'
- WALL THICKNESS IMPERIAL:
- 0.160'
- COMPRESSION RATIO IMPERIAL:
- 12.8:1
- PISTON HEAD SHAPE:
- DOMED
- RIDING STYLE:
- ATV
- UNITS:
- KIT
$329.99Qty in Cart: 0Quantity:Price:$329.99Subtotal:
