Dirt Bike Engine
Discover a full range of dirt bike engine components for rebuilding or upgrading your performance. 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.
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
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HOT RODS Crankshaft Assembly 4138
HOT RODS
$430.95HOT RODS Crankshaft Assembly 4138Sold complete with the original proven Hot Rods connecting rods, top-end bearings and crankshaft webs, Factory assembled and trued to OEM specifications; meet or surpass OEM in performance and durability, Complete and...H134- SKU:
- H134
- Availability:
- Ships Same Business Day
- Weight:
- 8.92 LBS
- COLOR/FINISH:
- STEEL
- MATERIAL:
- 4140 STEEL
- UNITS:
- ASSEMBLY
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 49.80 MM
- DISPLACEMENT:
- 250 CC
- MODEL:
- 2-CYCLE
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
- FEATURES:
- STANDARD CRANKSHAFT
- TYPE:
- OEM STROKE
$430.95 -
HOT RODS Crankshaft Assembly 4017
HOT RODS
$465.95HOT RODS Crankshaft Assembly 4017Sold complete with the original proven Hot Rods connecting rods, top-end bearings and crankshaft webs, Factory assembled and trued to OEM specifications; meet or surpass OEM in performance and durability, Complete and...H128X- SKU:
- H128X
- Availability:
- Ships Same Business Day
- Weight:
- 9.46 LBS
- UNITS:
- ASSEMBLY
- DISPLACEMENT:
- 250 CC
- MATERIAL:
- 4140 STEEL
- MODEL:
- 2-CYCLE
- STROKE LENGTH METRIC:
- 72.00 MM
- TYPE:
- OEM STROKE
- FEATURES:
- STANDARD CRANKSHAFT
- COLOR/FINISH:
- STEEL
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
- RIDING STYLE:
- OFF-ROAD
$465.95 -
HOT RODS Crankshaft Assembly 4036
HOT RODS
$392.95HOT RODS Crankshaft Assembly 4036Sold complete with the original proven Hot Rods connecting rods, top-end bearings and crankshaft webs, Factory assembled and trued to OEM specifications; meet or surpass OEM in performance and durability, Complete and...H125X- SKU:
- H125X
- Availability:
- Ships Same Business Day
- Weight:
- 6.20 LBS
- MODEL:
- 2-CYCLE
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
- UNITS:
- ASSEMBLY
- COLOR/FINISH:
- STEEL
- MATERIAL:
- 4140 STEEL
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 54.60 MM
- TYPE:
- OEM STROKE
- DISPLACEMENT:
- 125 CC
- FEATURES:
- STANDARD CRANKSHAFT
$392.95 -
HOT RODS Crankshaft Assembly 4035
HOT RODS
$417.95HOT RODS Crankshaft Assembly 4035Sold complete with the original proven Hot Rods connecting rods, top-end bearings and crankshaft webs, Factory assembled and trued to OEM specifications; meet or surpass OEM in performance and durability, Complete and...H124- SKU:
- H124
- Availability:
- Ships Same Business Day
- Weight:
- 6.30 LBS
- COLOR/FINISH:
- STEEL
- DISPLACEMENT:
- 125 CC
- MATERIAL:
- 4140 STEEL
- UNITS:
- ASSEMBLY
- FEATURES:
- STANDARD CRANKSHAFT
- MODEL:
- 2-CYCLE
- TYPE:
- OEM STROKE
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 54.60 MM
$417.95Qty in Cart: 0Quantity:Price:$417.95Subtotal: -
HOT RODS Crankshaft Assembly 4034
HOT RODS
$257.95HOT RODS Crankshaft Assembly 4034Sold complete with the original proven Hot Rods connecting rods, top-end bearings and crankshaft webs, Factory assembled and trued to OEM specifications; meet or surpass OEM in performance and durability, Complete and...H123- SKU:
- H123
- Availability:
- Ships Same Business Day
- Weight:
- 4.45 LBS
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
- FEATURES:
- STANDARD CRANKSHAFT
- MODEL:
- 2-CYCLE
- TYPE:
- OEM STROKE
- COLOR/FINISH:
- STEEL
- DISPLACEMENT:
- 85 CC
- MATERIAL:
- 4140 STEEL
- UNITS:
- ASSEMBLY
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 48.00 MM
$257.95 -
HOT RODS Crankshaft Assembly 4033
HOT RODS
$294.95HOT RODS Crankshaft Assembly 4033Sold complete with the original proven Hot Rods connecting rods, top-end bearings and crankshaft webs, Factory assembled and trued to OEM specifications; meet or surpass OEM in performance and durability, Complete and...H122- SKU:
- H122
- Availability:
- Ships Same Business Day
- Weight:
- 4.50 LBS
- MODEL:
- 2-CYCLE
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 48.00 MM
- UNITS:
- ASSEMBLY
- COLOR/FINISH:
- STEEL
- DISPLACEMENT:
- 80 CC
- MATERIAL:
- 4140 STEEL
- FEATURES:
- STANDARD CRANKSHAFT
- TYPE:
- OEM STROKE
$294.95 -
HOT RODS Crankshaft Assembly 4016
HOT RODS
$270.95HOT RODS Crankshaft Assembly 4016Sold complete with the original proven Hot Rods connecting rods, top-end bearings and crankshaft webs, Factory assembled and trued to OEM specifications; meet or surpass OEM in performance and durability, Complete and...H119- SKU:
- H119
- Availability:
- Ships Same Business Day
- Weight:
- 4.50 LBS
- MODEL:
- 2-CYCLE
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
- DISPLACEMENT:
- 80 CC TO 100 CC
- FEATURES:
- STANDARD CRANKSHAFT
- STROKE LENGTH METRIC:
- 45.80 MM
- TYPE:
- OEM STROKE
- COLOR/FINISH:
- STEEL
- MATERIAL:
- 4140 STEEL
- UNITS:
- ASSEMBLY
- RIDING STYLE:
- OFF-ROAD
$270.95 -
HOT RODS Crankshaft Assembly 4012
HOT RODS
$183.95HOT RODS Crankshaft Assembly 4012Sold complete with the original proven Hot Rods connecting rods, top-end bearings and crankshaft webs, Factory assembled and trued to OEM specifications; meet or surpass OEM in performance and durability, Complete and...H115- SKU:
- H115
- Availability:
- Ships Same Business Day
- Weight:
- 4.65 LBS
- MODEL:
- 2-CYCLE
- COLOR/FINISH:
- STEEL
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
- DISPLACEMENT:
- 80 CC
- FEATURES:
- STANDARD CRANKSHAFT
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 48.00 MM
- TYPE:
- OEM STROKE
- MATERIAL:
- 4140 STEEL
- UNITS:
- ASSEMBLY
$183.95 -
HOT RODS Crankshaft Assembly 4002
HOT RODS
$397.95HOT RODS Crankshaft Assembly 4002Sold complete with the original proven Hot Rods connecting rods, top-end bearings and crankshaft webs, Factory assembled and trued to OEM specifications; meet or surpass OEM in performance and durability, Complete and...H101- SKU:
- H101
- Availability:
- Ships Same Business Day
- Weight:
- 9.19 LBS
- MATERIAL:
- 4140 STEEL
- STROKE LENGTH METRIC:
- 72.00 MM
- UNITS:
- ASSEMBLY
- DISPLACEMENT:
- 250 CC
- FEATURES:
- STANDARD CRANKSHAFT
- MODEL:
- 2-CYCLE
- TYPE:
- OEM STROKE
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
- RIDING STYLE:
- OFF-ROAD
- COLOR/FINISH:
- STEEL
$397.95Qty in Cart: 0Quantity:Price:$397.95Subtotal: -
Hot Cams Stage 1 Camshaft for Honda CRF450R 2002-2006 1016-1
HOT CAMS
$415.95HOT CAMS Camshaft 1016-1 Elevate your racing performance with the HOT CAMS Camshaft 1016-1, engineered for enthusiasts seeking maximum power and responsiveness. Available in Stage 1 and Stage 2 options, these camshafts seamlessly integrate with stock...CRF450S1A- SKU:
- CRF450S1A
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
- EXHAUST DURATION IMPERIAL:
- 270°
- INTAKE LIFT METRIC:
- 9.60 MM
- EXHAUST LIFT METRIC:
- 8.80 MM
- INTAKE DURATION IMPERIAL:
- 238°
- RIDING STYLE:
- ATV
- TYPE:
- STAGE 1
- APPLICATION:
- EXHAUST
- APPLICATION:
- INTAKE
- UNITS:
- EACH
- PRODUCT NAME:
- CAMSHAFT
$415.95 -
HOT RODS Connecting Rod 8159
HOT RODS
$140.95HOT RODS Connecting Rod 8159Heavy-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...CR177- SKU:
- CR177
- Availability:
- Ships Same Business Day
- Weight:
- 0.76 LBS
- ENGINE TYPE:
- 2-CYCLE
- FEATURES:
- INCLUDES THRUST WASHERS
- PRODUCT NAME:
- CONNECTING ROD KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- MATERIAL:
- 8620 STEEL
$140.95 -
HOT RODS Connecting Rod 8143
HOT RODS
$140.95HOT RODS Connecting Rod 8143Heavy-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...CR174- SKU:
- CR174
- Availability:
- Ships Same Business Day
- Weight:
- 0.81 LBS
- MATERIAL:
- 8620 STEEL
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- FEATURES:
- INCLUDES THRUST WASHERS
- PRODUCT NAME:
- CONNECTING ROD KIT
- ENGINE TYPE:
- 2-CYCLE
$140.95Qty in Cart: 0Quantity:Price:$140.95Subtotal: -
HOT RODS Connecting Rod 8147
HOT RODS
$128.95HOT RODS Connecting Rod 8147Heavy-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...CR171- SKU:
- CR171
- Availability:
- Ships Same Business Day
- Weight:
- 0.63 LBS
- ENGINE TYPE:
- 2-CYCLE
- UNITS:
- KIT
- FEATURES:
- INCLUDES THRUST WASHERS
- MATERIAL:
- 8620 STEEL
- PRODUCT NAME:
- CONNECTING ROD KIT
- RIDING STYLE:
- OFF-ROAD
$128.95 -
HOT RODS Connecting Rod 8139
HOT RODS
$153.95HOT RODS Connecting Rod 8139Heavy-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...CR166- SKU:
- CR166
- Availability:
- Ships Same Business Day
- Weight:
- 1.50 LBS
- MATERIAL:
- 8620 STEEL
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- FEATURES:
- INCLUDES THRUST WASHERS
- ENGINE TYPE:
- 2-CYCLE
- PRODUCT NAME:
- CONNECTING ROD KIT
$153.95 -
HOT RODS Connecting Rod 8140
HOT RODS
$162.95HOT RODS Connecting Rod 8140Heavy-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...CR165- SKU:
- CR165
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- FEATURES:
- INCLUDES THRUST WASHERS
- ENGINE TYPE:
- 2-CYCLE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- MATERIAL:
- 8620 STEEL
- PRODUCT NAME:
- CONNECTING ROD KIT
$162.95 -
HOT RODS Connecting Rod 8148
HOT RODS
$189.95HOT RODS Connecting Rod 8148Heavy-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...CR164- SKU:
- CR164
- Availability:
- Ships Same Business Day
- Weight:
- 1.25 LBS
- MATERIAL:
- 8620 STEEL
- PRODUCT NAME:
- CONNECTING ROD KIT
- RIDING STYLE:
- OFF-ROAD
- ENGINE TYPE:
- 2-CYCLE
- FEATURES:
- INCLUDES THRUST WASHERS
- UNITS:
- KIT
$189.95 -
HOT RODS Connecting Rod 8141
HOT RODS
$147.95HOT RODS Connecting Rod 8141Heavy-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...CR161- SKU:
- CR161
- Availability:
- Ships Same Business Day
- Weight:
- 1.06 LBS
- MATERIAL:
- 8620 STEEL
- PRODUCT NAME:
- CONNECTING ROD KIT
- RIDING STYLE:
- OFF-ROAD
- ENGINE TYPE:
- 2-CYCLE
- FEATURES:
- INCLUDES THRUST WASHERS
- UNITS:
- KIT
$147.95 -
HOT RODS Connecting Rod 8142
HOT RODS
$135.95HOT RODS Connecting Rod 8142Heavy-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...CR160- SKU:
- CR160
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- ENGINE TYPE:
- 2-CYCLE
- UNITS:
- KIT
- FEATURES:
- INCLUDES THRUST WASHERS
- PRODUCT NAME:
- CONNECTING ROD KIT
- RIDING STYLE:
- OFF-ROAD
- MATERIAL:
- 8620 STEEL
$135.95 -
COMETIC Top End Gasket Set - RM85 C7857
COMETIC
$31.95COMETIC Top End Gasket Set RM85 C7857Top 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...C7857- SKU:
- C7857
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- TOP END
- UNITS:
- KIT
$31.95Qty in Cart: 0Quantity:Price:$31.95Subtotal: -
COMETIC Top End Gasket Set - YZ250 C7855
COMETIC
$47.95COMETIC Top End Gasket Set YZ250 C7855Top 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...C7855- SKU:
- C7855
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- GASKET KIT
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
$47.95
