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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JAGG OIL COOLERS Hose Separator - Silver - 3/8" 22-JHS06-SL
JAGG OIL COOLERS
$10.95Machined from billet aluminum, Suitable for 3/8" plain rubber or braided oil hose, Install in a snap07130235- SKU:
- 07130235
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- BASE FINISH:
- CHROME
- COLOR/FINISH:
- CHROME
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- HOSE SEPARATOR
- UNITS:
- EACH
- MATERIAL:
- BILLET ALUMINUM
- MOUNTING STYLE:
- BOLT-ON
$10.95Qty in Cart: 0Quantity:Price:$10.95Subtotal: -
On Sale
HOT RODS Seal Output Shaft OSK0011
HOT RODS
MSRP: $29.95Now: $26.96Was: $29.95A quick solution to repairing a leaking countershaft seal in one complete kit, Includes Hot Rods countershaft seal, countershaft bushing, O-rings, and sprocket nut washer (where applicable), Kits do not include water pump bearing or transmission bearings.09350577- SKU:
- 09350577
- Availability:
- Ships Same Business Day
- Weight:
- 0.14 LBS
- PRODUCT NAME:
- SEAL
- APPLICATION:
- COUNTERSHAFT
- APPLICATION:
- TRANSMISSION
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
MSRP: $29.95Now: $26.96Was: $29.95 -
On Sale
HOT RODS Seal Output Shaft OSK0032
HOT RODS
MSRP: $38.95Now: $35.06Was: $38.95A quick solution to repairing a leaking countershaft seal in one complete kit, Includes Hot Rods countershaft seal, countershaft bushing, O-rings, and sprocket nut washer (where applicable), Kits do not include water pump bearing or transmission bearings.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
MSRP: $38.95Now: $35.06Was: $38.95 -
On Sale
HOT RODS Seal Output Shaft OSK0056
HOT RODS
MSRP: $39.95Now: $35.96Was: $39.95A quick solution to repairing a leaking countershaft seal in one complete kit, Includes Hot Rods countershaft seal, countershaft bushing, O-rings, and sprocket nut washer (where applicable), Kits do not include water pump bearing or transmission bearings.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
MSRP: $39.95Now: $35.96Was: $39.95Qty in Cart: 0Quantity:Price:MSRP: $39.95Now: $35.96Was: $39.95Subtotal: -
On Sale
HOT RODS Water Pump Repair Kit - Husqvarna WPK0066
HOT RODS
MSRP: $79.95Now: $71.96Was: $79.95Kits include water pump cover gasket, water pump shaft bearing(s) and seal(s) to repair a leaking pump or failed bearing, Precision micro bearings provide OEM quality and durability, High-pressure/temperature mechanical and rubber seals, Do not include...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
MSRP: $79.95Now: $71.96Was: $79.95 -
On Sale
HOT RODS Counter Balancer Bearing Kit BBK0020
HOT RODS
MSRP: $38.95Now: $35.06Was: $38.95A must-have for any new counter balancer or engine case installation or repair, Includes trusted Hot Rods bearings for the counter balancer shaft of most modern 4-stroke engines, Does not include water pump bearing or transmission bearings.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
MSRP: $38.95Now: $35.06Was: $38.95Qty in Cart: 0Quantity:Price:MSRP: $38.95Now: $35.06Was: $38.95Subtotal: -
On Sale
HOT RODS Water Pump Repair Kit - Yamaha WPK0015
HOT RODS
MSRP: $34.95Now: $31.46Was: $34.95Kits include water pump cover gasket, water pump shaft bearing(s) and seal(s) to repair a leaking pump or failed bearing, Precision micro bearings provide OEM quality and durability, High-pressure/temperature mechanical and rubber seals, Does not include...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
MSRP: $34.95Now: $31.46Was: $34.95 -
On Sale
HOT RODS Water Pump Repair Kit - Yamaha WPK0022
HOT RODS
MSRP: $34.95Now: $31.46Was: $34.95Kits include water pump cover gasket, water pump shaft bearing(s) and seal(s) to repair a leaking pump or failed bearing, Precision micro bearings provide OEM quality and durability, High-pressure/temperature mechanical and rubber seals, Does not include...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
MSRP: $34.95Now: $31.46Was: $34.95 -
On Sale
HOT RODS Water Pump Repair Kit - Suzuki WPK0042
HOT RODS
MSRP: $30.95Now: $27.86Was: $30.95Kits include water pump cover gasket, water pump shaft bearing(s) and seal(s) to repair a leaking pump or failed bearing, Precision micro bearings provide OEM quality and durability, High-pressure/temperature mechanical and rubber seals, Does not include...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
MSRP: $30.95Now: $27.86Was: $30.95Qty in Cart: 0Quantity:Price:MSRP: $30.95Now: $27.86Was: $30.95Subtotal: -
On Sale
HOT RODS Water Pump Repair Kit - KTM WPK0049
HOT RODS
MSRP: $36.95Now: $33.26Was: $36.95Kits include water pump cover gasket, water pump shaft bearing(s) and seal(s) to repair a leaking pump or failed bearing, Precision micro bearings provide OEM quality and durability, High-pressure/temperature mechanical and rubber seals, Does not include...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
MSRP: $36.95Now: $33.26Was: $36.95Qty in Cart: 0Quantity:Price:MSRP: $36.95Now: $33.26Was: $36.95Subtotal: -
On Sale
HOT RODS Water Pump Kit HR00052
HOT RODS
MSRP: $41.95Now: $37.76Was: $41.95Kit includes water pump cover gasket, water pump shaft bearing(s), and seal(s) to repair a leaking pump or failed bearing, Precision micro bearings provide OEM quality and durability, High pressure/temperature mechanical and rubber seals, Do not include...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
MSRP: $41.95Now: $37.76Was: $41.95Qty in Cart: 0Quantity:Price:MSRP: $41.95Now: $37.76Was: $41.95Subtotal: -
On Sale
HOT RODS Counter Balancer Bearing Kit - Honda BBK0001
HOT RODS
MSRP: $23.95Now: $21.56Was: $23.95A must-have for any new counter balancer or engine case installation or repair, Includes trusted Hot Rods bearings for the counter balancer shaft of most modern 4-stroke engines, Does not include water pump bearing or transmission bearings.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
MSRP: $23.95Now: $21.56Was: $23.95 -
On Sale
HOT RODS Water Pump Repair Kit - KTM WPK0060
HOT RODS
MSRP: $51.95Now: $46.76Was: $51.95Kits include water pump cover gasket, water pump shaft bearing(s) and seal(s) to repair a leaking pump or failed bearing, Precision micro bearings provide OEM quality and durability, High-pressure/temperature mechanical and rubber seals, Does not include...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
MSRP: $51.95Now: $46.76Was: $51.95Qty in Cart: 0Quantity:Price:MSRP: $51.95Now: $46.76Was: $51.95Subtotal: -
On Sale
HOT RODS Water Pump Repair Kit - Honda WPK0001
HOT RODS
MSRP: $34.95Now: $31.46Was: $34.95Kits include water pump cover gasket, water pump shaft bearing(s) and seal(s) to repair a leaking pump or failed bearing, Precision micro bearings provide OEM quality and durability, High-pressure/temperature mechanical and rubber seals, Does not include...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
MSRP: $34.95Now: $31.46Was: $34.95 -
On Sale
HOT RODS Water Pump Repair Kit - Yamaha WPK0019
HOT RODS
MSRP: $34.95Now: $31.46Was: $34.95Kits include water pump cover gasket, water pump shaft bearing(s) and seal(s) to repair a leaking pump or failed bearing, Precision micro bearings provide OEM quality and durability, High-pressure/temperature mechanical and rubber seals, Does not include...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
MSRP: $34.95Now: $31.46Was: $34.95 -
On Sale
HOT RODS Connecting Rod 8693
HOT RODS
MSRP: $245.95Now: $221.36Was: $245.95Heavy-duty OE replacement connecting rods, Certified 8620 AISI steel provides superior strength, Crankpins are manufactured from hot-rolled ASTM 4115 and case hardened to 58-62Rc, Feature the latest in caged needle roller bearing designs for high rpm...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
MSRP: $245.95Now: $221.36Was: $245.95Qty in Cart: 0Quantity:Price:MSRP: $245.95Now: $221.36Was: $245.95Subtotal: -
On Sale
HOT RODS Crank Bearings K238
HOT RODS
MSRP: $75.95Now: $68.36Was: $75.95Precision, high-quality main bearing and seal kits complement installation of Hot Rods crankshaft assemblies09240060- 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
MSRP: $75.95Now: $68.36Was: $75.95 -
On Sale
HOT RODS Crank Bearings K055
HOT RODS
MSRP: $104.95Now: $94.46Was: $104.95Precision, high-quality main bearing and seal kits complement installation of Hot Rods crankshaft assemblies09240165- 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
MSRP: $104.95Now: $94.46Was: $104.95Qty in Cart: 0Quantity:Price:MSRP: $104.95Now: $94.46Was: $104.95Subtotal: -
On Sale
HOT RODS Crankshaft Kit CBK0008
HOT RODS
MSRP: $662.95Now: $596.66Was: $662.95Assembly sold complete with Hot Rods connecting rod, Factory assembled and true to OEM specifications, Hot Rods cranks will meet or surpass the OEM in performance, Ready for installation, Crankshaft is completely rebuildable with genuine Hot Rods...09210267- SKU:
- 09210267
- Availability:
- Ships Same Business Day
- Weight:
- 12.80 LBS
- TYPE:
- OEM
- UNITS:
- KIT
- PRODUCT NAME:
- CRANKSHAFT KIT
- RIDING STYLE:
- OFF-ROAD
MSRP: $662.95Now: $596.66Was: $662.95Qty in Cart: 0Quantity:Price:MSRP: $662.95Now: $596.66Was: $662.95Subtotal: -
On Sale
COMETIC Top End Gasket Set - XR650 C7681
COMETIC
MSRP: $47.95Now: $45.00Was: $47.95Top end gasket kits include correct base, head gasket and cylinder O-rings as well as other top end specific O-rings or seals needed for R&R of top end, MLS head gaskets promote an even torque load across the gasket sealing surface, providing less bore...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
MSRP: $47.95Now: $45.00Was: $47.95
