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 OSK0033
HOT RODS
$8.95A leaking countershaft seal will compromise your transmission performance and lead to costly internal damage if left unaddressed. This complete kit eliminates the guesswork by bundling everything needed for a proper seal replacement in one package,...09350596- SKU:
- 09350596
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- APPLICATION:
- COUNTERSHAFT
- APPLICATION:
- TRANSMISSION
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- SEAL
$8.95 -
HOT RODS Seal Output Shaft OSK0036
HOT RODS
$30.95A leaking countershaft seal will compromise your transmission's integrity and lead to costly damage if left unaddressed. The HOT RODS Seal Output Shaft kit eliminates the guesswork by bundling everything you need for a complete repair in one...09350598- SKU:
- 09350598
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- SEAL
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- COUNTERSHAFT
- APPLICATION:
- TRANSMISSION
- UNITS:
- KIT
$30.95 -
HOT RODS Seal Output Shaft OSK0037
HOT RODS
$38.95A leaking countershaft seal will compromise your transmission's integrity and lead to costly damage if left unaddressed. This complete HOT RODS kit eliminates the guesswork by bundling everything needed for a proper repair in one purchase, saving you...09350599- SKU:
- 09350599
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- APPLICATION:
- COUNTERSHAFT
- APPLICATION:
- TRANSMISSION
- PRODUCT NAME:
- SEAL
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$38.95 -
HOT RODS Seal Output Shaft OSK0054
HOT RODS
$39.95A leaking countershaft seal will compromise your transmission's integrity and lead to costly damage if left unaddressed. This complete kit from HOT RODS gives you everything needed to stop the leak and restore proper operation in one installation,...09350724- SKU:
- 09350724
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- SEAL
- APPLICATION:
- COUNTERSHAFT
- APPLICATION:
- TRANSMISSION
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$39.95 -
HOT RODS Water Pump Repair Kit - Kawasaki WPK0030
HOT RODS
$39.95A leaking water pump doesn't just waste coolant—it puts your engine at risk of overheating and catastrophic failure. The HOT RODS Water Pump Repair Kit gives you OEM-quality replacement internals to restore pump integrity without the cost of a full...09345375- SKU:
- 09345375
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP
- UNITS:
- KIT
- PRODUCT NAME:
- REPAIR KIT
$39.95 -
HOT RODS Water Pump Repair Kit - KTM WPK0068
HOT RODS
$70.95A leaking water pump compromises engine cooling efficiency and can lead to catastrophic overheating—especially under racing conditions or extended high-load operation. The HOT RODS Water Pump Repair Kit (WPK0068) gives you OEM-equivalent precision...09345377- SKU:
- 09345377
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- REPAIR KIT
- TYPE:
- WATER PUMP
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$70.95 -
HOT RODS Water Pump Shaft HRSHA-005
HOT RODS
$34.95A worn water pump shaft compromises cooling system efficiency and accelerates seal degradation, leading to costly leaks and potential engine damage. The HOT RODS Water Pump Shaft HRSHA-005 restores OE-spec performance with precision engineering and a...09500578- SKU:
- 09500578
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- UNITS:
- EACH
- TYPE:
- WATER PUMP
- PRODUCT NAME:
- SHAFT
- RIDING STYLE:
- OFF-ROAD
$34.95 -
HOT RODS Counter Balancer Bearing Kit - Yamaha BBK0013
HOT RODS
$67.95A failing counter balancer bearing will compromise engine reliability and performance—especially critical during high-RPM operation or after case work. This HOT RODS kit delivers OEM-grade bearings engineered to handle the demanding loads of modern...09500555- SKU:
- 09500555
- Availability:
- Ships Same Business Day
- Weight:
- 0.26 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- BEARING KIT
- TYPE:
- COUNTERBALANCE SHAFT
$67.95 -
On Sale
HOT RODS Counter Balancer Bearing Kit - Honda BBK0030
HOT RODS
MSRP: $18.95Now: $12.00Was: $18.95If you're rebuilding or replacing your counter balancer shaft, using OEM-quality bearings is non-negotiable—substandard bearings will introduce vibration, reduce engine longevity, and compromise the entire build. The HOT RODS Counter Balancer Bearing Kit...09500909- SKU:
- 09500909
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 LBS
- PRODUCT NAME:
- BEARING
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COUNTERBALANCE SHAFT
- UNITS:
- KIT
MSRP: $18.95Now: $12.00Was: $18.95 -
HOT RODS Water Pump Repair Kit - Yamaha WPK0059
HOT RODS
$34.95A failing water pump doesn't just waste your time—it puts your engine at risk. This HOT RODS repair kit gives you OEM-quality bearings and seals to restore proper cooling circulation and eliminate leaks without replacing the entire pump. Whether you're...09344044- SKU:
- 09344044
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 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 - KTM WPK0051
HOT RODS
$110.95Water pump failures can sideline your bike at the worst possible moment—whether you're on the track or miles from the nearest shop. This repair kit addresses the root causes of pump degradation by replacing critical internal components that wear under...09343048- SKU:
- 09343048
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP REPAIR
- UNITS:
- KIT
$110.95 -
HOT RODS Water Pump Repair Kit - Yamaha WPK0017
HOT RODS
$34.95A failing water pump doesn't just reduce cooling efficiency—it can leave you stranded mid-race or mid-ride with catastrophic engine damage. The HOT RODS Water Pump Repair Kit (WPK0017) gives you OEM-quality replacement components to restore your pump's...09342929- SKU:
- 09342929
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP REPAIR
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
$34.95 -
HOT RODS Water Pump Repair Kit - Yamaha WPK0029
HOT RODS
$34.95A failing water pump doesn't just compromise cooling efficiency—it threatens catastrophic engine damage and costly downtime. The HOT RODS WPK0029 delivers precision micro bearings and high-performance seals engineered to OEM specifications, restoring...09342940- SKU:
- 09342940
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP REPAIR
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
$34.95 -
HOT RODS Water Pump Repair Kit WPK0031
HOT RODS
$34.95A failing water pump doesn't just leak—it threatens engine temperature control and can lead to catastrophic overheating. The HOT RODS Water Pump Repair Kit WPK0031 gives you a cost-effective alternative to full pump replacement, addressing the root...09342941- SKU:
- 09342941
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- REPAIR KIT
- TYPE:
- WATER PUMP
$34.95 -
HOT RODS Water Pump Repair Kit - Kawasaki WPK0033
HOT RODS
$40.95A leaking water pump isn't just an annoyance—it's a threat to engine reliability and performance. This repair kit gives you OEM-quality components to restore your Kawasaki's cooling system without replacing the entire pump assembly. Whether you're...09342942- SKU:
- 09342942
- Availability:
- Ships Same Business Day
- Weight:
- 0.17 LBS
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP REPAIR
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
$40.95 -
HOT RODS Water Pump Repair Kit - Kawasaki WPK0034
HOT RODS
$44.95A leaking or failing water pump can sideline your machine and compromise engine cooling performance when you need it most. This HOT RODS repair kit delivers OEM-quality replacement components—gaskets, bearings, and seals—to restore your pump to factory...09342943- SKU:
- 09342943
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP REPAIR
- UNITS:
- KIT
$44.95 -
HOT RODS Water Pump Repair Kit - Kawasaki WPK0036
HOT RODS
$40.95A leaking water pump compromises cooling efficiency and risks catastrophic engine damage—this repair kit gives you OEM-quality replacement components without the cost of a full pump replacement. The precision micro bearings and high-pressure seals...09342944- SKU:
- 09342944
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP REPAIR
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
$40.95 -
HOT RODS Water Pump Repair Kit - Kawasaki WPK0038
HOT RODS
$34.95A leaking or worn water pump compromises engine cooling efficiency and risks catastrophic overheating—especially under race conditions or sustained high-load operation. This HOT RODS repair kit delivers OEM-quality components to restore your pump's...09342946- SKU:
- 09342946
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP REPAIR
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
$34.95 -
HOT RODS Water Pump Repair Kit WPK0039
HOT RODS
$39.95A leaking water pump compromises cooling system integrity and can lead to catastrophic engine damage if left unaddressed. The HOT RODS Water Pump Repair Kit WPK0039 gives you OEM-quality replacement components to restore your pump's seal and bearing...09342947- SKU:
- 09342947
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP REPAIR
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
$39.95 -
HOT RODS Water Pump Repair Kit - Suzuki WPK0040
HOT RODS
$46.95A leaking water pump doesn't just waste coolant—it can lead to catastrophic engine overheating and costly downtime. The HOT RODS Water Pump Repair Kit gives you everything needed to restore pump integrity without replacing the entire assembly, saving...09342948- SKU:
- 09342948
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- WATER PUMP REPAIR
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
$46.95
