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 Crank Bearings K052
HOT RODS
$93.95Precision, high-quality main bearing and seal kits complement installation of Hot Rods crankshaft assemblies09240167- 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
$105.95Precision, high-quality main bearing and seal kits complement installation of Hot Rods crankshaft assemblies09240168- 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 K045
HOT RODS
$78.95Precision, high-quality main bearing and seal kits complement installation of Hot Rods crankshaft assemblies09240169- SKU:
- 09240169
- Availability:
- Ships Same Business Day
- Weight:
- 0.89 LBS
- APPLICATION:
- MAIN CRANKSHAFT
- UNITS:
- KIT
- PRODUCT NAME:
- BEARING
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- BALL
$78.95 -
HOT RODS Crank Bearings K041
HOT RODS
$83.95Precision, high-quality main bearing and seal kits complement installation of Hot Rods crankshaft assemblies09240116- 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
$118.95Precision, high-quality main bearing and seal kits complement installation of Hot Rods crankshaft assemblies09240119- 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 K058
HOT RODS
$116.95Precision, high-quality main bearing and seal kits complement installation of Hot Rods crankshaft assemblies09240126- SKU:
- 09240126
- Availability:
- Ships Same Business Day
- Weight:
- 1.62 LBS
- PRODUCT NAME:
- BEARING
- TYPE:
- BALL
- UNITS:
- SET
- APPLICATION:
- MAIN CRANKSHAFT
- RIDING STYLE:
- OFF-ROAD
$116.95 -
HOT RODS Crank Bearings K093
HOT RODS
$159.95Seal kits complement installation of Hot Rods crankshaft assemblies09240402- 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
$81.95Seal kits complement installation of Hot Rods crankshaft assemblies09240403- 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 - Stroker 4199
HOT RODS
$202.95Hot Rods has developed six long-stroke applications for ATVs, Special pistons for TRX400EX, KFX/LTZ 400, Banshee, Warrior and Raptor make these installations simple by avoiding machine work and parts typically required for long-stroke engines09210220- SKU:
- 09210220
- Availability:
- Ships Same Business Day
- Weight:
- 9.30 LBS
- FEATURES:
- HEAVY DUTY CRANKSHAFT
- MATERIAL:
- 4140 STEEL
- MODEL:
- 4-CYCLE
- STROKE LENGTH:
- 56,60 MM
- UNITS:
- ASSEMBLY
- COLOR/FINISH:
- STEEL
- DISPLACEMENT:
- 263 CC
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 56.60 MM
- TYPE:
- STROKER
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
$202.95 -
HOT RODS Crankshaft Kit 4427
HOT RODS
$556.95Assembly 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...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
$515.95Assembly 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...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 -
HOT RODS Bottom End Kit CBK0202
HOT RODS
$531.95Kit features everything needed to complete crankshaft installation including Hot Rods main bearings and seals kit plus a complete engine gasket set that includes all gaskets and seals for a complete engine rebuild, "Stroker Kits" crankshaft assemblies...09210536- SKU:
- 09210536
- Availability:
- Ships Same Business Day
- Weight:
- 4.65 LBS
- MODEL:
- 2-CYCLE
- MATERIAL:
- 4140 STEEL
- STROKE LENGTH METRIC:
- STANDARD
- PRODUCT NAME:
- BOTTOM END KIT
- UNITS:
- KIT
- COLOR/FINISH:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- OE REPLACEMENT
$531.95 -
HOT RODS Bottom End Kit CBK0203
HOT RODS
$476.95Kit features everything needed to complete crankshaft installation including Hot Rods main bearings and seals kit plus a complete engine gasket set that includes all gaskets and seals for a complete engine rebuild, "Stroker Kits" crankshaft assemblies...09210537- SKU:
- 09210537
- Availability:
- Ships Same Business Day
- Weight:
- 7.10 LBS
- MODEL:
- 2-CYCLE
- COLOR/FINISH:
- STEEL
- UNITS:
- KIT
- MATERIAL:
- 4140 STEEL
- STROKE LENGTH METRIC:
- STANDARD
- TYPE:
- OE REPLACEMENT
- PRODUCT NAME:
- BOTTOM END KIT
- RIDING STYLE:
- OFF-ROAD
$476.95 -
HOT RODS Crankshaft Kit CBK0010
HOT RODS
$716.95Assembly 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...09210269- SKU:
- 09210269
- Availability:
- Ships Same Business Day
- Weight:
- 13.30 LBS
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- CRANKSHAFT KIT
- TYPE:
- OEM
$716.95 -
HOT RODS Crankshaft Kit CBK0011
HOT RODS
$716.95Assembly 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...09210270- SKU:
- 09210270
- Availability:
- Ships Same Business Day
- Weight:
- 13.05 LBS
- UNITS:
- KIT
- PRODUCT NAME:
- CRANKSHAFT KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- OEM
$716.95 -
HOT RODS Crankshaft Kit CBK0012
HOT RODS
$595.95Assembly 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...09210271- SKU:
- 09210271
- Availability:
- Ships Same Business Day
- Weight:
- 14.62 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- CRANKSHAFT KIT
- TYPE:
- OEM
$595.95 -
HOT RODS Crankshaft Kit CBK0040
HOT RODS
$569.95Assembly 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...09210292- SKU:
- 09210292
- Availability:
- Ships Same Business Day
- Weight:
- 12.23 LBS
- TYPE:
- OEM
- PRODUCT NAME:
- CRANKSHAFT KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$569.95 -
HOT RODS Crankshaft Kit CBK0045
HOT RODS
$278.95Assembly 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...09210293- SKU:
- 09210293
- Availability:
- Ships Same Business Day
- Weight:
- 7.00 LBS
- TYPE:
- OEM
- UNITS:
- KIT
- PRODUCT NAME:
- CRANKSHAFT KIT
- RIDING STYLE:
- OFF-ROAD
$278.95 -
HOT RODS Crankshaft Kit CBK0047
HOT RODS
$305.95Assembly 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...09210295- SKU:
- 09210295
- Availability:
- Ships Same Business Day
- Weight:
- 6.95 LBS
- PRODUCT NAME:
- CRANKSHAFT KIT
- TYPE:
- OEM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$305.95 -
HOT RODS Crankshaft Kit CBK0048
HOT RODS
$397.95Assembly 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...09210296- SKU:
- 09210296
- Availability:
- Ships Same Business Day
- Weight:
- 6.30 LBS
- PRODUCT NAME:
- CRANKSHAFT KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- OEM
$397.95
