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 130682
JE PISTONS
$269.99When you're pushing your engine to the absolute limit in professional competition, your pistons need to handle extreme loads without compromise. JE PISTONS 130682 kits deliver the precision engineering and material science required for forced induction...09105834- SKU:
- 09105834
- Availability:
- Ships Same Business Day
- Weight:
- 1.61 LBS
- PISTON HEAD SHAPE:
- FLAT TOP
- TYPE:
- ROUND FORGED DESIGN
- BORE SIZE METRIC:
- 100.00 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- BORE - OVERSIZE:
- STANDARD
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- PRODUCT NAME:
- PISTON KIT
- STYLE:
- JE PISTON
- BORE - OVERSIZE METRIC:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 11.25:1
- DISPLACEMENT:
- 644 CC
$269.99 -
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 specifically for professional competition and high-boost...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 precision engineering and durability required for...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
$269.99 -
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 PISTONS' Pro Series 221767 kit is engineered...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 for professional racing applications, engineered with...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
$309.99 -
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 environments. These forged-aluminum pistons are...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 applications, combining lightweight construction with...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 engineering required for professional-level racing. These forged...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 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 the precision engineering and durability required for...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 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' Pro Series kit delivers the precision engineering and...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 trusted by professional racers—to handle extreme loads...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 professional racers and extreme-duty applications, with...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 professional racers demand, with 2618-T6 forged aluminum...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 262284
JE PISTONS
$329.99When you're pushing your engine to the limit in competition, your pistons need to withstand extreme pressures and temperatures without compromise. JE Pistons' 262284 kit delivers the precision engineering and durability required for professional-grade...09105875- SKU:
- 09105875
- Availability:
- Ships Same Business Day
- Weight:
- 1.41 LBS
- RIDING STYLE:
- ATV
- BORE SIZE METRIC:
- 96.00 MM
- PRODUCT NAME:
- PISTON KIT
- WALL THICKNESS:
- 0,160'
- WALL THICKNESS IMPERIAL:
- 0.160'
- COMPRESSION RATIO IMPERIAL:
- 13.5:1
- DISPLACEMENT:
- 449 CC
- UNITS:
- KIT
- PISTON HEAD SHAPE:
- DOMED
$329.99 -
JE PISTONS Piston Kit 262285
JE PISTONS
$309.99When you're pushing your engine to the limit in competition, your pistons need to handle extreme pressure, heat, and RPM without compromise. JE Pistons' Pro Series 262285 kit is engineered specifically for professional-grade racing applications,...09105876- SKU:
- 09105876
- Availability:
- Ships Same Business Day
- Weight:
- 1.41 LBS
- BORE SIZE METRIC:
- 94.00 MM
- RIDING STYLE:
- ATV
- WALL THICKNESS:
- 0,150'
- COMPRESSION RATIO IMPERIAL:
- 12.0:1
- DISPLACEMENT:
- 449 CC
- PISTON HEAD SHAPE:
- DOMED
- UNITS:
- KIT
- PRODUCT NAME:
- PISTON KIT
- WALL THICKNESS IMPERIAL:
- 0.150'
$309.99 -
JE PISTONS Piston Kit 274177
JE PISTONS
$309.99When you're pushing your engine to the limit in competition, your pistons need to handle extreme pressures and temperatures without compromise. JE PISTONS' Pro Series 274177 kit delivers the precision engineering and durability that professional racers...09105878- SKU:
- 09105878
- Availability:
- Ships Same Business Day
- Weight:
- 0.66 LBS
- DISPLACEMENT:
- 170 CC
- BORE - OVERSIZE METRIC:
- +4.00 MM
- BORE SIZE METRIC:
- 70.00 MM
- COMPRESSION RATIO IMPERIAL:
- 13.0:1
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- PRODUCT NAME:
- PISTON KIT
- STYLE:
- JE PISTON
- BORE - OVERSIZE:
- +4,00 MM
- PISTON HEAD SHAPE:
- DOMED
- TYPE:
- FORGED SIDE RELIEF DESIGN
$309.99 -
JE PISTONS Piston Kit 274189
JE PISTONS
$346.99When you're pushing your engine to the absolute limit, your pistons need to match that intensity. JE PISTONS' Pro Series 274189 kit delivers the precision engineering and durability required for professional competition and extreme forced-induction...09105880- SKU:
- 09105880
- Availability:
- Ships Same Business Day
- Weight:
- 1.36 LBS
- COMPRESSION RATIO IMPERIAL:
- 12.8:1
- DISPLACEMENT:
- 449 CC
- WALL THICKNESS:
- 0,160'
- BORE SIZE METRIC:
- 96.00 MM
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- ATV
- PISTON HEAD SHAPE:
- DOMED
- UNITS:
- KIT
- WALL THICKNESS IMPERIAL:
- 0.160'
$346.99 -
JE PISTONS Piston Kit 274190
JE PISTONS
$346.99When you're pushing your engine to the absolute limit in competition, factory pistons won't cut it—you need a piston kit engineered specifically for the extreme demands of professional racing. JE PISTONS 274190 delivers the precision, durability, and...09105881- SKU:
- 09105881
- Availability:
- Ships Same Business Day
- Weight:
- 1.16 LBS
- UNITS:
- KIT
- WALL THICKNESS IMPERIAL:
- 0.160'
- PISTON HEAD SHAPE:
- DOMED
- RIDING STYLE:
- ATV
- BORE SIZE METRIC:
- 96.00 MM
- COMPRESSION RATIO IMPERIAL:
- 13.5:1
- DISPLACEMENT:
- 449 CC
- PRODUCT NAME:
- PISTON KIT
- WALL THICKNESS:
- 0,160'
$346.99 -
JE PISTONS Piston Kit 274191
JE PISTONS
$524.99When you're pushing your engine to its limits in competition, piston failure isn't an option—it's a catastrophe. JE PISTONS' 274191 Kit delivers the structural integrity and precision engineering demanded by professional racers and extreme-duty...09105882- SKU:
- 09105882
- Availability:
- Ships Same Business Day
- Weight:
- 2.26 LBS
- RIDING STYLE:
- ATV
- UNITS:
- KIT
- WALL THICKNESS IMPERIAL:
- 0.140'
- RIDING STYLE:
- UTV
- WALL THICKNESS:
- 0,140'
- DISPLACEMENT:
- 749 CC
- PISTON HEAD SHAPE:
- DOMED
- BORE SIZE METRIC:
- 85.00 MM
- COMPRESSION RATIO IMPERIAL:
- 11.5:1
- PRODUCT NAME:
- PISTON KIT
$524.99 -
JE PISTONS Piston Kit 284766
JE PISTONS
$329.99When 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 284766 kit delivers the precision engineering and durability required for...09105897- SKU:
- 09105897
- Availability:
- Ships Same Business Day
- Weight:
- 1.35 LBS
- WALL THICKNESS:
- 0,150'
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- ATV
- COMPRESSION RATIO IMPERIAL:
- 11.0:1
- UNITS:
- KIT
- BORE SIZE METRIC:
- 105.50 MM
- DISPLACEMENT:
- 735 CC
- PISTON HEAD SHAPE:
- DOMED
- WALL THICKNESS IMPERIAL:
- 0.150'
$329.99
