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
-
Cylinder Works Big Bore Cylinder Kit 295cc for Yamaha YZ250 1999-2023 21009-K01
CYLINDER WORKS
$1,195.95Upgrade your Yamaha with our high-performance Big Bore Cylinder Kit, designed for effortless installation and superior durability. This ready-to-install kit features OEM-like aesthetics and is engineered to enhance your engine's efficiency and...09311163- SKU:
- 09311163
- Availability:
- Ships Same Business Day
- Weight:
- 8.71 LBS
- COLOR/FINISH:
- GRAY
- CYLINDER DIAMETER:
- 72,00 MM
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- CYLINDER DIAMETER METRIC:
- 72.00 MM
- DISPLACEMENT:
- 295 CC
- OVERBORE METRIC:
- +5.60 MM
- PRODUCT NAME:
- CYLINDER KIT
- STYLE:
- BIG BORE
$1,195.95 -
ACERBIS X-Power Kit - Black - Suzuki 2983330001
ACERBIS
$76.95X-Power Kit - Black - Suzuki Right side: clutch crankcase and water pump protection, Left side: ignition crankcase protection, Resistant to high temperatures, the numerous air intakes prevent overheating, Applies with the original screws adhering...09402143- SKU:
- 09402143
- Availability:
- Ships Same Business Day
- Weight:
- 1.47 LBS
- COLOR/FINISH:
- BLACK
- MATERIAL:
- METAL
- MATERIAL:
- PLASTIC
- RIDING STYLE:
- STREET
- MODEL:
- X-POWER
- TYPE:
- SIDE COVER
- PRODUCT NAME:
- X-POWER KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$76.95 -
ACERBIS X-Power Kit - Black - Husqvarna/KTM 2983230001
ACERBIS
$76.95X-Power Kit - Black - Husqvarna/KTM Protects against wear, shock, abrasion, mud sand and debris, Right side: clutch cover protection, water pump and lower crankcase, Left side: ignition cover protection, Resistant to high temperatures, numerous vents...09402144- SKU:
- 09402144
- Availability:
- Ships Same Business Day
- Weight:
- 1.45 LBS
- MODEL:
- X-POWER
- COLOR/FINISH:
- BLACK
- MATERIAL:
- PLASTIC
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- MATERIAL:
- STEEL
- PRODUCT NAME:
- X-POWER KIT
- TYPE:
- SIDE COVER
$76.95 -
ACERBIS X-Power Kit - Blue - Husqvarna/KTM 2983230003
ACERBIS
$76.95X-Power Kit - Blue - Husqvarna/KTM Protects against wear, shock, abrasion, mud sand and debris, Right side: clutch cover protection, water pump and lower crankcase, Left side: ignition cover protection, Resistant to high temperatures, numerous vents...09402145- SKU:
- 09402145
- Availability:
- Ships Same Business Day
- Weight:
- 1.40 LBS
- COLOR/FINISH:
- BLUE
- MATERIAL:
- PLASTIC
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- MODEL:
- X-POWER
- TYPE:
- SIDE COVER
- MATERIAL:
- STEEL
- PRODUCT NAME:
- X-POWER KIT
$76.95 -
ACERBIS X-Power Kit - Black - Honda CRF 2982510001
ACERBIS
$76.95X-Power Kit - Black - Honda CRF Adheres perfectly to the original crankcase and protects them from wear, impact, abrasion, mud sand and debris, Right side: clutch housing and water pump, Left side: crankcase protection, High temperature resistant,...09402146- SKU:
- 09402146
- Availability:
- Ships Same Business Day
- Weight:
- 1.34 LBS
- MODEL:
- X-POWER
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- STREET
- UNITS:
- KIT
- MATERIAL:
- STEEL
- PRODUCT NAME:
- X-POWER KIT
- MATERIAL:
- NYLON
- TYPE:
- SIDE COVER
$76.95 -
ACERBIS X-Power Kit - Red - Honda CRF 2982510004
ACERBIS
$76.95X-Power Kit - Red - Honda CRF Adheres perfectly to the original crankcase and protects them from wear, impact, abrasion, mud sand and debris, Right side: clutch housing and water pump, Left side: crankcase protection, High temperature resistant, numerous...09402147- SKU:
- 09402147
- Availability:
- Ships Same Business Day
- Weight:
- 1.40 LBS
- MATERIAL:
- STEEL
- PRODUCT NAME:
- X-POWER KIT
- UNITS:
- KIT
- COLOR/FINISH:
- RED
- RIDING STYLE:
- STREET
- MODEL:
- X-POWER
- MATERIAL:
- NYLON
- TYPE:
- SIDE COVER
$76.95 -
ACERBIS X-Power Kit - Orange - Husqvarna/KTM 2983235226
ACERBIS
$76.95X-Power Kit - Orange - Husqvarna/KTM Protects against wear, shock, abrasion, mud sand and debris, Right side: clutch cover protection, water pump and lower crankcase, Left side: ignition cover protection, Resistant to high temperatures, numerous vents...09402148- SKU:
- 09402148
- Availability:
- Ships Same Business Day
- Weight:
- 1.40 LBS
- COLOR/FINISH:
- ORANGE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- MATERIAL:
- STEEL
- PRODUCT NAME:
- X-POWER KIT
- TYPE:
- SIDE COVER
- MATERIAL:
- PLASTIC
- MODEL:
- X-POWER
$76.95 -
ACERBIS X-Power Kit - Orange - Husqvarna/KTM 2981365226
ACERBIS
$76.95X-Power Kit - Orange - Husqvarna/KTM Protects against wear, shock, abrasion, mud sand and debris, Right side: clutch cover protection, water pump and lower crankcase, Left side: ignition cover protection and ignition cable, Resistant to high...09402149- SKU:
- 09402149
- Availability:
- Ships Same Business Day
- Weight:
- 1.40 LBS
- MATERIAL:
- BRASS
- PRODUCT NAME:
- X-POWER KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- COLOR/FINISH:
- ORANGE
- MODEL:
- X-POWER
- MATERIAL:
- NYLON
- TYPE:
- SIDE COVER
$76.95 -
ACERBIS X-Power Kit - Black - Husqvarna/KTM 2981360001
ACERBIS
$76.95X-Power Kit - Black - Husqvarna/KTM Protects against wear, shock, abrasion, mud sand and debris, Right side: clutch cover protection, water pump and lower crankcase, Left side: ignition cover protection and ignition cable, Resistant to high temperatures,...09402150- SKU:
- 09402150
- Availability:
- Ships Same Business Day
- Weight:
- 1.40 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- MATERIAL:
- BRASS
- PRODUCT NAME:
- X-POWER KIT
- MATERIAL:
- NYLON
- MODEL:
- X-POWER
- TYPE:
- SIDE COVER
- COLOR/FINISH:
- BLACK
$76.95 -
ACERBIS X-Power Kit - Blue - Husqvarna/KTM 2981360003
ACERBIS
$76.95X-Power Kit - Blue - Husqvarna/KTM Protects against wear, shock, abrasion, mud sand and debris, Right side: clutch cover protection, water pump and lower crankcase, Left side: ignition cover protection and ignition cable, Resistant to high temperatures,...09402151- SKU:
- 09402151
- Availability:
- Ships Same Business Day
- Weight:
- 1.35 LBS
- MATERIAL:
- BRASS
- PRODUCT NAME:
- X-POWER KIT
- COLOR/FINISH:
- BLUE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- MATERIAL:
- NYLON
- MODEL:
- X-POWER
- TYPE:
- SIDE COVER
$76.95 -
ACERBIS X-Power Kit - Orange - Husqvarna/KTM 2981475226
ACERBIS
$76.95X-Power Kit - Orange - Husqvarna/KTM Protects against wear, shocks, abrasion, mud sand and debris, Right side: clutch cover protection, water pump and lower crankcase, Left side: ignition cover protection, Durable to high temperatures, numerous air vents...09402152- SKU:
- 09402152
- Availability:
- Ships Same Business Day
- Weight:
- 1.25 LBS
- COLOR/FINISH:
- ORANGE
- RIDING STYLE:
- STREET
- MATERIAL:
- BRASS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- X-POWER KIT
- TYPE:
- SIDE COVER
- MATERIAL:
- NYLON
- MODEL:
- X-POWER
$76.95 -
ACERBIS X-Power Kit - Black - Husqvarna/KTM 2981470001
ACERBIS
$76.95X-Power Kit - Black - Husqvarna/KTM Protects against wear, shocks, abrasion, mud sand and debris, Right side: clutch cover protection, water pump and lower crankcase, Left side: ignition cover protection, Durable to high temperatures, numerous air vents...09402153- SKU:
- 09402153
- Availability:
- Ships Same Business Day
- Weight:
- 1.30 LBS
- MATERIAL:
- BRASS
- PRODUCT NAME:
- X-POWER KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- STREET
- MODEL:
- X-POWER
- MATERIAL:
- NYLON
- TYPE:
- SIDE COVER
$76.95 -
ACERBIS X-Power Kit - Blue - Husqvarna/KTM 2981470003
ACERBIS
$76.95X-Power Kit - Blue - Husqvarna/KTM Protects against wear, shocks, abrasion, mud sand and debris, Right side: clutch cover protection, water pump and lower crankcase, Left side: ignition cover protection, Durable to high temperatures, numerous air vents...09402154- SKU:
- 09402154
- Availability:
- Ships Same Business Day
- Weight:
- 0.65 LBS
- MODEL:
- X-POWER
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- BLUE
- UNITS:
- KIT
- MATERIAL:
- BRASS
- PRODUCT NAME:
- X-POWER KIT
- RIDING STYLE:
- OFF-ROAD
- MATERIAL:
- NYLON
- TYPE:
- SIDE COVER
$76.95 -
ACERBIS X-Power Kit - Black - Yamaha YZ450F 2981870001
ACERBIS
$76.95X-Power Kit - Black - Yamaha YZ450F Ignition crankcase and clutch crankcase protection kit, Protects against wear, impact, abrasion, mud, sand and debris, Right side: clutch crankcase protection, water pump and lower crankcase, Left side: ignition...09402156- SKU:
- 09402156
- Availability:
- Ships Same Business Day
- Weight:
- 1.40 LBS
- MATERIAL:
- NYLON
- MODEL:
- X-POWER
- COLOR/FINISH:
- BLACK
- MATERIAL:
- BRASS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- X-POWER KIT
- TYPE:
- SIDE COVER
$76.95 -
ACERBIS X-Power Kit - Blue - Yamaha YZ450F 2981870211
ACERBIS
$76.95X-Power Kit - Blue - Yamaha YZ450F Ignition crankcase and clutch crankcase protection kit, Protects against wear, impact, abrasion, mud, sand and debris, Right side: clutch crankcase protection, water pump and lower crankcase, Left side: ignition...09402157- SKU:
- 09402157
- Availability:
- Ships Same Business Day
- Weight:
- 1.46 LBS
- COLOR/FINISH:
- BLUE
- MODEL:
- X-POWER
- MATERIAL:
- NYLON
- TYPE:
- SIDE COVER
- MATERIAL:
- BRASS
- PRODUCT NAME:
- X-POWER KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$76.95 -
ACERBIS X-Power Kit - Black - Gas Gas/Husqvarna/KTM 2983260001
ACERBIS
$76.95X-Power Kit - Black - Gas Gas/Husqvarna/KTM Protects against wear, shock, abrasion, mud sand and debris, Right side: clutch cover protection, water pump and lower crankcase, Left side: ignition cover protection, Resistant to high temperatures, numerous...09402158- SKU:
- 09402158
- Availability:
- Ships Same Business Day
- Weight:
- 1.30 LBS
- TYPE:
- SIDE COVER
- MODEL:
- X-POWER
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- BLACK
- MATERIAL:
- PLASTIC
- UNITS:
- KIT
- MATERIAL:
- STEEL
- PRODUCT NAME:
- X-POWER KIT
- RIDING STYLE:
- OFF-ROAD
$76.95 -
ACERBIS X-Power Kit - Blue - Gas Gas/Husqvarna/KTM 2983260003
ACERBIS
$76.95X-Power Kit - Blue - Gas Gas/Husqvarna/KTM Protects against wear, shock, abrasion, mud sand and debris, Right side: clutch cover protection, water pump and lower crankcase, Left side: ignition cover protection, Resistant to high temperatures, numerous...09402159- SKU:
- 09402159
- Availability:
- Ships Same Business Day
- Weight:
- 1.25 LBS
- RIDING STYLE:
- STREET
- MATERIAL:
- PLASTIC
- MODEL:
- X-POWER
- TYPE:
- SIDE COVER
- MATERIAL:
- STEEL
- PRODUCT NAME:
- X-POWER KIT
- COLOR/FINISH:
- BLUE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$76.95 -
ACERBIS X-Power Kit - Orange - Gas Gas/Husqvarna/KTM 2983265226
ACERBIS
$76.95X-Power Kit - Orange - Gas Gas/Husqvarna/KTM Protects against wear, shock, abrasion, mud sand and debris, Right side: clutch cover protection, water pump and lower crankcase, Left side: ignition cover protection, Resistant to high temperatures, numerous...09402160- SKU:
- 09402160
- Availability:
- Ships Same Business Day
- Weight:
- 1.40 LBS
- MATERIAL:
- PLASTIC
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- RIDING STYLE:
- STREET
- MODEL:
- X-POWER
- TYPE:
- SIDE COVER
- COLOR/FINISH:
- ORANGE
- MATERIAL:
- STEEL
- PRODUCT NAME:
- X-POWER KIT
$76.95 -
MOOSE RACING Piston Kit MX2045
MOOSE RACING
$386.95Piston Kit Moose Racing pistons feature X-style forgings and fully boxed-style (race pistons) forgings for ultimate strength, minimizing friction, durability, power, and weight reduction, Pro Race Piston increases the durability by reducing the stresses...09106482- SKU:
- 09106482
- Availability:
- Ships Same Business Day
- Weight:
- 1.15 LBS
$386.95Qty in Cart: 0Quantity:Price:$386.95Subtotal: -
MOOSE RACING Piston Kit MP4028
MOOSE RACING
$326.95Piston Kit Moose Racing pistons feature X-style forgings and fully boxed-style (race pistons) forgings for ultimate strength, minimizing friction, durability, power, and weight reduction, Pro Race Piston increases the durability by reducing the stresses...09106485- SKU:
- 09106485
- Availability:
- Ships Same Business Day
- Weight:
- 1.41 LBS
$326.95
