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!
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- Qty in Cart
- Quantity
- Price
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HOT RODS Water Pump Repair Kit - Honda WPK0011
HOT RODS
$41.95A leaking water pump doesn't just waste coolant—it signals bearing wear that will only accelerate if ignored. This repair kit gives you OEM-quality components to restore your pump's integrity without a full replacement, saving time and cost on your next...09342923- SKU:
- 09342923
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP REPAIR
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
$41.95 -
HOT RODS Water Pump Repair Kit Honda WPK0012
HOT RODS
$39.95A leaking water pump compromises cooling system integrity and risks catastrophic engine damage—this repair kit restores your Honda's thermal management without replacing the entire assembly. Whether you're addressing a weeping gasket or a worn bearing,...09342924- SKU:
- 09342924
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- WATER PUMP REPAIR
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
$39.95 -
HOT RODS Water Pump Repair Kit - Yamaha WPK0016
HOT RODS
$34.95A leaking or failing water pump doesn't just waste coolant—it compromises engine temperature control and can lead to catastrophic overheating. This HOT RODS repair kit delivers OEM-quality replacement components that restore your pump to factory...09342928- SKU:
- 09342928
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP REPAIR
- UNITS:
- KIT
$34.95 -
HOT RODS Water Pump Repair Kit - Yamaha WPK0020
HOT RODS
$34.95A leaking water pump compromises engine cooling efficiency and risks catastrophic overheating—this repair kit restores OEM-spec performance without replacing the entire assembly. Whether you're addressing a weeping seal or a failed bearing, the HOT RODS...09342931- SKU:
- 09342931
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP REPAIR
- UNITS:
- KIT
$34.95 -
HOT RODS Connecting Rod 8646
HOT RODS
$185.95When you're pushing your engine to the limit, a weak connecting rod becomes your biggest liability. The HOT RODS 8646 is engineered for the demands of high-RPM racing and heavy-duty applications, delivering the strength and reliability you need to keep...09230198- SKU:
- 09230198
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
- MATERIAL:
- 8620 STEEL
- PRODUCT NAME:
- CONNECTING ROD KIT
- STYLE:
- HEAVY DUTY
- ENGINE TYPE:
- 4-CYCLE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$185.95 -
HOT RODS Connecting Rod 8656
HOT RODS
$245.95Whether you're building a high-rpm engine or replacing worn OE rods, the HOT RODS 8656 connecting rod delivers the strength and precision required for sustained performance. The combination of certified 8620 AISI steel, case-hardened crankpins, and...09230199- SKU:
- 09230199
- Availability:
- Ships Same Business Day
- Weight:
- 1.77 LBS
- ENGINE TYPE:
- 4-CYCLE
- MATERIAL:
- 8620 STEEL
- PRODUCT NAME:
- CONNECTING ROD KIT
- STYLE:
- HEAVY DUTY
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$245.95 -
HOT RODS Connecting Rod 8647
HOT RODS
$232.95When you're pushing your engine to high RPM limits, your connecting rods are under extreme stress—and OEM components often can't handle sustained performance demands. The HOT RODS 8647 is built specifically for engines that need reliability at the edge,...09230200- SKU:
- 09230200
- Availability:
- Ships Same Business Day
- Weight:
- 1.70 LBS
- PRODUCT NAME:
- CONNECTING ROD KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- ENGINE TYPE:
- 4-CYCLE
- MATERIAL:
- 8620 STEEL
- STYLE:
- HEAVY DUTY
$232.95 -
HOT RODS Crank Bearings K229
HOT RODS
$88.95A crankshaft is only as reliable as its bearing assembly. The HOT RODS K229 crank bearing kit delivers precision-engineered main bearing and seal components that ensure proper load distribution, reduce friction, and maintain critical tolerances...09240053- SKU:
- 09240053
- Availability:
- Ships Same Business Day
- Weight:
- 1.39 LBS
- PRODUCT NAME:
- BEARING
- TYPE:
- BALL
- APPLICATION:
- MAIN CRANKSHAFT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$88.95 -
HOT RODS Crank Bearings K231
HOT RODS
$88.95A quality crankshaft assembly is only as reliable as the bearings supporting it. The HOT RODS K231 Crank Bearings are precision-engineered main bearing and seal kits designed to work seamlessly with HOT RODS crankshaft assemblies, ensuring proper load...09240055- SKU:
- 09240055
- Availability:
- Ships Same Business Day
- Weight:
- 1.15 LBS
- TYPE:
- BALL
- APPLICATION:
- MAIN CRANKSHAFT
- PRODUCT NAME:
- BEARING
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$88.95 -
HOT RODS Crank Bearings K235
HOT RODS
$78.95A quality crankshaft assembly is only as reliable as its bearing and seal kit. The HOT RODS K235 crank bearings are precision-engineered to handle the extreme pressures and thermal cycling that come with high-performance engine builds. These bearings...09240059- SKU:
- 09240059
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
- APPLICATION:
- MAIN CRANKSHAFT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- BEARING
- TYPE:
- BALL
$78.95 -
HOT RODS Crank Bearings K043
HOT RODS
$119.95A crankshaft is only as reliable as its bearing package. The HOT RODS K043 Crank Bearings deliver precision-engineered main bearing and seal kits that ensure proper load distribution, reduce friction, and extend engine life during high-RPM operation...09240160- SKU:
- 09240160
- Availability:
- Ships Same Business Day
- Weight:
- 0.96 LBS
- PRODUCT NAME:
- BEARING
- TYPE:
- BALL
- APPLICATION:
- MAIN CRANKSHAFT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$119.95 -
HOT RODS Crank Bearings K050
HOT RODS
$105.95A crankshaft is only as reliable as its bearings. The HOT RODS K050 Crank Bearings are precision-engineered main bearing and seal kits designed to work seamlessly with HOT RODS crankshaft assemblies, ensuring proper clearances, load distribution, and oil...09240161- SKU:
- 09240161
- Availability:
- Ships Same Business Day
- Weight:
- 1.58 LBS
- UNITS:
- SET
- PRODUCT NAME:
- BEARING
- TYPE:
- BALL
- APPLICATION:
- MAIN CRANKSHAFT
- RIDING STYLE:
- OFF-ROAD
$105.95 -
HOT RODS Crank Bearings K052
HOT RODS
$93.95A crankshaft is only as reliable as its bearing support system. The HOT RODS K052 crank bearing kit ensures precision fitment and optimal load distribution across your engine's most critical rotating assembly, eliminating premature wear and catastrophic...09240167- SKU:
- 09240167
- Availability:
- Ships Same Business Day
- Weight:
- 1.03 LBS
- APPLICATION:
- MAIN CRANKSHAFT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- BEARING
- TYPE:
- BALL
$93.95 -
HOT RODS Crank Bearings K044
HOT RODS
$105.95A quality crankshaft assembly demands equally reliable main bearings and seals to ensure proper load distribution, minimize friction, and maintain critical oil pressure throughout your engine's operating range. HOT RODS K044 crank bearings are engineered...09240168- SKU:
- 09240168
- Availability:
- Ships Same Business Day
- Weight:
- 1.30 LBS
- APPLICATION:
- MAIN CRANKSHAFT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- BEARING
- TYPE:
- BALL
$105.95 -
HOT RODS Crank Bearings K041
HOT RODS
$83.95A crankshaft is only as reliable as its bearings. The HOT RODS K041 crank bearing and seal kit delivers the precision tolerances and material quality needed to handle sustained high-RPM loads without premature wear or failure. Whether you're rebuilding a...09240116- SKU:
- 09240116
- Availability:
- Ships Same Business Day
- Weight:
- 1.06 LBS
- PRODUCT NAME:
- BEARING
- TYPE:
- BALL
- APPLICATION:
- MAIN CRANKSHAFT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$83.95 -
HOT RODS Crank Bearings K048
HOT RODS
$118.95A quality crankshaft is only as reliable as the bearings supporting it. The HOT RODS Crank Bearings K048 are precision-engineered main bearing and seal kits designed to work seamlessly with HOT RODS crankshaft assemblies, ensuring proper load...09240119- SKU:
- 09240119
- Availability:
- Ships Same Business Day
- Weight:
- 0.71 LBS
- PRODUCT NAME:
- BEARING
- TYPE:
- BALL
- APPLICATION:
- MAIN CRANKSHAFT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$118.95 -
HOT RODS Crank Bearings K093
HOT RODS
$159.95A quality crankshaft seal kit is non-negotiable when installing a HOT RODS crankshaft assembly—it's your first line of defense against oil leakage and contamination. The K093 Seal Kit ensures a proper, leak-free installation by providing OEM-spec seals...09240402- SKU:
- 09240402
- Availability:
- Ships Same Business Day
- Weight:
- 1.35 LBS
- APPLICATION:
- MAIN CRANKSHAFT
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- BEARING SET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$159.95 -
HOT RODS Crank Bearings K089
HOT RODS
$81.95A quality crankshaft seal kit is essential insurance against oil leakage and contamination that can compromise engine reliability and performance. The HOT RODS K089 Crank Bearings Seal Kit ensures proper fluid containment during and after crankshaft...09240403- SKU:
- 09240403
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- APPLICATION:
- MAIN CRANKSHAFT
- PRODUCT NAME:
- BEARING SET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$81.95 -
HOT RODS Crankshaft Kit 4427
HOT RODS
$556.95Whether you're building a high-displacement engine or replacing a worn OEM crankshaft, the HOT RODS Crankshaft Kit 4427 delivers factory-matched precision without the factory limitations. This complete assembly arrives pre-assembled and true to OEM...09210783- SKU:
- 09210783
- Availability:
- Ships Same Business Day
- Weight:
- 7.05 LBS
- DISPLACEMENT:
- 250 CC
- MATERIAL:
- 4140 STEEL
- STROKE LENGTH METRIC:
- 53.60 MM
- TYPE:
- OEM STROKE
- FEATURES:
- STANDARD CRANKSHAFT
- RIDING STYLE:
- OFF-ROAD
- MODEL:
- 4-CYCLE
- COLOR/FINISH:
- STEEL
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
- UNITS:
- ASSEMBLY
$556.95 -
HOT RODS Crankshaft Kit 4428
HOT RODS
$515.95If you're building a high-performance engine or pushing your existing setup beyond stock limits, the HOT RODS Crankshaft Kit 4428 delivers the reliability and durability you need to survive sustained boost and rpm. Factory-assembled and validated to OEM...09210784- SKU:
- 09210784
- Availability:
- Ships Same Business Day
- Weight:
- 9.85 LBS
- FEATURES:
- STANDARD CRANKSHAFT
- MODEL:
- 4-CYCLE
- DISPLACEMENT:
- 450 CC
- MATERIAL:
- 4140 STEEL
- TYPE:
- OEM STROKE
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
- RIDING STYLE:
- OFF-ROAD
- COLOR/FINISH:
- STEEL
- STROKE LENGTH METRIC:
- 62.10 MM
- UNITS:
- ASSEMBLY
$515.95
