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
-
HOT RODS Water Pump Repair Kit Honda WPK0012
HOT RODS
$39.95Kits 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...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 - Honda WPK0013
HOT RODS
$38.95Kits 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...09342925- SKU:
- 09342925
- Availability:
- Ships Same Business Day
- Weight:
- 0.18 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP REPAIR
- UNITS:
- KIT
$38.95 -
HOT RODS Water Pump Repair Kit - Yamaha WPK0016
HOT RODS
$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...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
$34.95Kits 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...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 Water Pump Repair Kit - Yamaha WPK0021
HOT RODS
$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...09342932- SKU:
- 09342932
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP REPAIR
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
$30.95 -
HOT RODS Connecting Rod 8646
HOT RODS
$185.95Heavy-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...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
$245.95Heavy-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...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
$232.95Heavy-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...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 K001
HOT RODS
$70.95Precision, high-quality main bearing and seal kits complement installation of Hot Rods crankshaft assemblies09240020- SKU:
- 09240020
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
- TYPE:
- BALL
- APPLICATION:
- MAIN CRANKSHAFT
- UNITS:
- KIT
- PRODUCT NAME:
- BEARING
- RIDING STYLE:
- OFF-ROAD
$70.95 -
HOT RODS Crank Bearings K228
HOT RODS
$115.95Precision, high-quality main bearing and seal kits complement installation of Hot Rods crankshaft assemblies09240052- SKU:
- 09240052
- Availability:
- Ships Same Business Day
- Weight:
- 1.40 LBS
- PRODUCT NAME:
- BEARING
- TYPE:
- BALL
- APPLICATION:
- MAIN CRANKSHAFT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$115.95 -
HOT RODS Crank Bearings K229
HOT RODS
$88.95Precision, high-quality main bearing and seal kits complement installation of Hot Rods crankshaft assemblies09240053- 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
$88.95Precision, high-quality main bearing and seal kits complement installation of Hot Rods crankshaft assemblies09240055- 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 K232
HOT RODS
$85.95Precision, high-quality main bearing and seal kits complement installation of Hot Rods crankshaft assemblies09240056- SKU:
- 09240056
- Availability:
- Ships Same Business Day
- Weight:
- 1.15 LBS
- PRODUCT NAME:
- BEARING
- TYPE:
- BALL
- APPLICATION:
- MAIN CRANKSHAFT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$85.95Qty in Cart: 0Quantity:Price:$85.95Subtotal: -
HOT RODS Crank Bearings K233
HOT RODS
$64.95Precision, high-quality main bearing and seal kits complement installation of Hot Rods crankshaft assemblies09240057- SKU:
- 09240057
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- APPLICATION:
- MAIN CRANKSHAFT
- UNITS:
- KIT
- PRODUCT NAME:
- BEARING
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- BALL
$64.95Qty in Cart: 0Quantity:Price:$64.95Subtotal: -
HOT RODS Crank Bearings K234
HOT RODS
$111.95Precision, high-quality main bearing and seal kits complement installation of Hot Rods crankshaft assemblies09240058- SKU:
- 09240058
- Availability:
- Ships Same Business Day
- Weight:
- 1.36 LBS
- APPLICATION:
- MAIN CRANKSHAFT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- BEARING
- TYPE:
- BALL
$111.95 -
HOT RODS Crank Bearings K235
HOT RODS
$78.95Precision, high-quality main bearing and seal kits complement installation of Hot Rods crankshaft assemblies09240059- 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 K042
HOT RODS
$100.95Precision, high-quality main bearing and seal kits complement installation of Hot Rods crankshaft assemblies09240159- SKU:
- 09240159
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- APPLICATION:
- MAIN CRANKSHAFT
- PRODUCT NAME:
- BEARING
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- BALL
$100.95 -
HOT RODS Crank Bearings K043
HOT RODS
$119.95Precision, high-quality main bearing and seal kits complement installation of Hot Rods crankshaft assemblies09240160- 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
$105.95Precision, high-quality main bearing and seal kits complement installation of Hot Rods crankshaft assemblies09240161- 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 K056
HOT RODS
$83.95Precision, high-quality main bearing and seal kits complement installation of Hot Rods crankshaft assemblies09240166- SKU:
- 09240166
- Availability:
- Ships Same Business Day
- Weight:
- 1.50 LBS
- PRODUCT NAME:
- BEARING
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- MAIN CRANKSHAFT
- TYPE:
- BALL
- UNITS:
- SET
- RIDING STYLE:
- STREET
$83.95
