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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HOT RODS Seal Output Shaft OSK0032
HOT RODS
$38.95A leaking countershaft seal can quickly escalate from a minor oil weep to catastrophic transmission damage if left unaddressed. This complete HOT RODS seal kit eliminates guesswork by bundling...09350595- SKU:
- 09350595
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- UNITS:
- KIT
- APPLICATION:
- COUNTERSHAFT
- APPLICATION:
- TRANSMISSION
- PRODUCT NAME:
- SEAL
- RIDING STYLE:
- OFF-ROAD
$38.95 -
HOT RODS Seal Output Shaft OSK0056
HOT RODS
$39.95A leaking countershaft seal can compromise your transmission's integrity and lead to costly damage if left unaddressed. This complete HOT RODS seal kit eliminates the guesswork by bundling everything...09350836- SKU:
- 09350836
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- COUNTERSHAFT
- APPLICATION:
- TRANSMISSION
- PRODUCT NAME:
- SEAL
$39.95 -
HOT RODS Water Pump Repair Kit - Husqvarna WPK0066
HOT RODS
$79.95A leaking water pump can compromise your engine's cooling system and lead to overheating—especially under the stress of high-RPM operation. This HOT RODS repair kit gives you everything needed to...09345373- SKU:
- 09345373
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP
- UNITS:
- KIT
- PRODUCT NAME:
- REPAIR KIT
$79.95 -
HOT RODS Counter Balancer Bearing Kit BBK0020
HOT RODS
$38.95A properly functioning counter balancer is critical to engine longevity and smooth operation—neglecting bearing quality during a rebuild or repair can lead to catastrophic failure and downtime. The...09500611- SKU:
- 09500611
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COUNTERBALANCE SHAFT
- UNITS:
- KIT
- PRODUCT NAME:
- BEARING KIT
$38.95Qty in Cart: 0Quantity:Price:$38.95Subtotal: -
HOT RODS Water Pump Repair Kit - Yamaha WPK0015
HOT RODS
$34.95A leaking water pump compromises engine cooling and can lead to catastrophic overheating—especially under racing conditions where thermal management is critical. This HOT RODS repair kit replaces...09342927- SKU:
- 09342927
- Availability:
- Ships Same Business Day
- Weight:
- 0.12 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP REPAIR
- UNITS:
- KIT
$34.95 -
HOT RODS Water Pump Repair Kit - Yamaha WPK0022
HOT RODS
$34.95A leaking water pump will compromise your engine's cooling system and lead to catastrophic overheating—especially under racing conditions. This HOT RODS repair kit supplies all the internal seals,...09342933- SKU:
- 09342933
- Availability:
- Ships Same Business Day
- Weight:
- 0.18 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP REPAIR
- UNITS:
- KIT
$34.95 -
HOT RODS Water Pump Repair Kit - Suzuki WPK0042
HOT RODS
$30.95A leaking water pump compromises cooling system integrity and risks catastrophic engine damage. This HOT RODS repair kit supplies genuine OEM-quality components—precision micro bearings, seals, and...09342950- SKU:
- 09342950
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP REPAIR
- UNITS:
- KIT
$30.95Qty in Cart: 0Quantity:Price:$30.95Subtotal: -
HOT RODS Water Pump Repair Kit - KTM WPK0049
HOT RODS
$36.95Water pump failures don't just leave you stranded—they compromise engine cooling and risk catastrophic overheating. The HOT RODS Water Pump Repair Kit (WPK0049) delivers OEM-equivalent seals,...09342956- SKU:
- 09342956
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP REPAIR
- UNITS:
- KIT
$36.95Qty in Cart: 0Quantity:Price:$36.95Subtotal: -
HOT RODS Water Pump Kit HR00052
HOT RODS
$41.95A failing water pump doesn't just compromise cooling efficiency—it threatens engine reliability and performance. The HOT RODS Water Pump Kit HR00052 delivers OEM-quality internal components to...09320253- SKU:
- 09320253
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- WATER PUMP
$41.95Qty in Cart: 0Quantity:Price:$41.95Subtotal: -
HOT RODS Counter Balancer Bearing Kit - Honda BBK0001
HOT RODS
$23.95A counter balancer bearing kit is essential when rebuilding or replacing your engine case or counter balancer shaft—skimping on this component risks catastrophic imbalance and premature wear. HOT...09500551- SKU:
- 09500551
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COUNTERBALANCE SHAFT
- UNITS:
- KIT
- PRODUCT NAME:
- BEARING KIT
$23.95 -
HOT RODS Water Pump Repair Kit - KTM WPK0060
HOT RODS
$51.95A leaking water pump compromises cooling efficiency and risks catastrophic engine damage—especially under sustained high RPMs. This HOT RODS repair kit supplies OEM-equivalent components to restore...09344045- SKU:
- 09344045
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP REPAIR
- UNITS:
- KIT
$51.95Qty in Cart: 0Quantity:Price:$51.95Subtotal: -
HOT RODS Water Pump Repair Kit - Honda WPK0001
HOT RODS
$34.95A failing water pump compromises engine cooling and can lead to catastrophic overheating—especially under racing conditions or sustained high-load driving. This repair kit gives you a cost-effective...09342913- SKU:
- 09342913
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP REPAIR
- UNITS:
- KIT
$34.95 -
HOT RODS Water Pump Repair Kit - Yamaha WPK0019
HOT RODS
$34.95A leaking water pump compromises engine cooling efficiency and can lead to catastrophic overheating if left unaddressed. This HOT RODS repair kit supplies OEM-quality replacement seals and bearings...09342930- SKU:
- 09342930
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP REPAIR
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
$34.95Qty in Cart: 0Quantity:Price:$34.95Subtotal: -
HOT RODS Connecting Rod 8693
HOT RODS
$245.95If you're pushing your engine to high RPM limits, connecting rod failure isn't just an inconvenience—it's catastrophic. The HOT RODS 8693 Connecting Rod delivers the strength and precision needed to...09230325- SKU:
- 09230325
- Availability:
- Ships Same Business Day
- Weight:
- 1.40 LBS
- ENGINE TYPE:
- 4-CYCLE
- MATERIAL:
- 8620 STEEL
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- CONNECTING ROD KIT
$245.95Qty in Cart: 0Quantity:Price:$245.95Subtotal: -
HOT RODS Crank Bearings K238
HOT RODS
$75.95A crankshaft assembly is only as reliable as its bearing support system. The HOT RODS K238 crank bearing kit provides precision-engineered main bearings and seals that eliminate excessive clearances...09240060- SKU:
- 09240060
- Availability:
- Ships Same Business Day
- Weight:
- 1.05 LBS
- PRODUCT NAME:
- BEARING
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- BALL
- APPLICATION:
- MAIN CRANKSHAFT
- RIDING STYLE:
- STREET
- UNITS:
- KIT
$75.95 -
HOT RODS Crank Bearings K055
HOT RODS
$104.95A crankshaft is only as reliable as its bearings. The HOT RODS K055 main bearing and seal kit ensures proper load distribution, reduces friction, and protects against catastrophic engine failure...09240165- SKU:
- 09240165
- Availability:
- Ships Same Business Day
- Weight:
- 0.92 LBS
- PRODUCT NAME:
- BEARING
- TYPE:
- BALL
- UNITS:
- SET
- APPLICATION:
- MAIN CRANKSHAFT
- RIDING STYLE:
- OFF-ROAD
$104.95Qty in Cart: 0Quantity:Price:$104.95Subtotal: -
HOT RODS Crankshaft Kit CBK0008
HOT RODS
$662.95If you're building a high-performance engine or need a reliable crankshaft assembly that meets or exceeds OEM specifications, the HOT RODS Crankshaft Kit CBK0008 delivers the precision and durability...09210267- SKU:
- 09210267
- Availability:
- Ships Same Business Day
- Weight:
- 12.80 LBS
- TYPE:
- OEM
- UNITS:
- KIT
- PRODUCT NAME:
- CRANKSHAFT KIT
- RIDING STYLE:
- OFF-ROAD
$662.95Qty in Cart: 0Quantity:Price:$662.95Subtotal: -
COMETIC Top End Gasket Set - XR650 C7681
COMETIC
$47.95A properly sealed top end is non-negotiable for engine reliability and peak performance. The COMETIC C7681 gasket set delivers the precision sealing your XR650 demands, using multi-layered steel...C7681- SKU:
- C7681
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- BORE SIZE METRIC:
- 101.00 MM
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- TOP END
- UNITS:
- KIT
$47.95 -
COMETIC Exhaust Gasket - Kawasaki C3501EX
COMETIC
$15.95Exhaust gasket failure leads to performance loss, increased emissions, and costly engine damage—especially under high heat and aggressive tuning. The COMETIC C3501EX delivers reliable, leak-free...09344187- SKU:
- 09344187
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- UNITS:
- SET
- BORE SIZE METRIC:
- 48.50 MM
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- GASKET
- MODEL:
- HI-PERFORMANCE
- TYPE:
- EXHAUST
$15.95Qty in Cart: 0Quantity:Price:$15.95Subtotal: -
COMETIC Clutch Gasket - Honda EC1074018AFM
COMETIC
$4.95A worn or failing clutch cover gasket leads to oil seepage, reduced clutch performance, and costly engine damage. The COMETIC Clutch Gasket eliminates these risks with a chemically bonded AFM...09344369- SKU:
- 09344369
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- MODEL:
- HI-PERFORMANCE
- PRODUCT NAME:
- GASKET
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CLUTCH COVER
$4.95
