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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BOYESEN Impeller/Waterpump Cover - Black WPK-44AB
BOYESEN
$194.95Engine temperature stability is critical to reliability and longevity, especially under sustained performance driving. The Boyesen WPK-44AB delivers measurable cooling gains by increasing coolant...09320154- SKU:
- 09320154
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- BASE FINISH:
- POWDER-COATED
- COLOR/FINISH:
- BLACK
- UNITS:
- KIT
- COLOR/FINISH:
- POWDER-COATED
- MATERIAL:
- ALUMINUM
- MODEL:
- SUPERCOOLER
- TYPE:
- WATER PUMP
- BASE COLOR:
- BLACK
- PRODUCT NAME:
- COVER AND IMPELLER KIT
- RIDING STYLE:
- OFF-ROAD
$194.95Qty in Cart: 0Quantity:Price:$194.95Subtotal: -
HOT RODS Seal Output Shaft OSK0038
HOT RODS
$35.95A leaking countershaft seal doesn't just waste oil—it compromises your transmission's performance and can lead to catastrophic bearing failure if left unchecked. The HOT RODS Seal Output Shaft kit...09350560- SKU:
- 09350560
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- SEAL
- APPLICATION:
- COUNTERSHAFT
- APPLICATION:
- TRANSMISSION
- UNITS:
- KIT
$35.95Qty in Cart: 0Quantity:Price:$35.95Subtotal: -
HOT RODS Seal Output Shaft OSK0040
HOT RODS
$37.95A leaking countershaft seal doesn't just waste oil—it compromises your transmission's reliability and can lead to catastrophic bearing failure if left unaddressed. The HOT RODS Seal Output Shaft kit...09350562- SKU:
- 09350562
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- COUNTERSHAFT
- APPLICATION:
- TRANSMISSION
- PRODUCT NAME:
- SEAL
- UNITS:
- KIT
$37.95 -
HOT RODS Seal Output Shaft OSK0050
HOT RODS
$39.95A leaking countershaft seal compromises transmission performance and risks catastrophic bearing failure if left unaddressed. This complete repair kit eliminates guesswork by bundling all necessary...09350565- SKU:
- 09350565
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- COUNTERSHAFT
- APPLICATION:
- TRANSMISSION
- PRODUCT NAME:
- SEAL
$39.95 -
HOT RODS Seal Output Shaft OSK0052
HOT RODS
$39.95A leaking countershaft seal will compromise transmission fluid integrity and accelerate wear on internal components—addressing it immediately prevents costly engine damage. The HOT RODS OSK0052...09350567- SKU:
- 09350567
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- APPLICATION:
- COUNTERSHAFT
- APPLICATION:
- TRANSMISSION
- PRODUCT NAME:
- SEAL
$39.95 -
HOT RODS Seal Output Shaft OSK0003
HOT RODS
$25.95A leaking countershaft seal doesn't just waste oil—it compromises engine reliability and can lead to catastrophic bearing failure if left unaddressed. The HOT RODS Seal Output Shaft kit (OSK0003)...09350570- SKU:
- 09350570
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- APPLICATION:
- COUNTERSHAFT
- APPLICATION:
- TRANSMISSION
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- SEAL
$25.95 -
HOT RODS Seal Output Shaft OSK0007
HOT RODS
$14.95A leaking countershaft seal compromises transmission reliability and can lead to costly damage if ignored. This complete HOT RODS repair kit eliminates the guesswork by bundling everything you need...09350573- SKU:
- 09350573
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- APPLICATION:
- COUNTERSHAFT
- APPLICATION:
- TRANSMISSION
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- SEAL
$14.95 -
HOT RODS Seal Output Shaft OSK0008
HOT RODS
$38.95A leaking countershaft seal transforms a minor repair into major engine damage if left unaddressed. This complete kit eliminates the guesswork and multiple part sourcing by bundling everything needed...09350574- SKU:
- 09350574
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- SEAL
- APPLICATION:
- COUNTERSHAFT
- APPLICATION:
- TRANSMISSION
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$38.95Qty in Cart: 0Quantity:Price:$38.95Subtotal: -
HOT RODS Seal Output Shaft OSK0009
HOT RODS
$37.95A leaking countershaft seal doesn't just waste oil—it compromises engine reliability and can lead to catastrophic bearing failure if left unchecked. The HOT RODS Seal Output Shaft kit gives you...09350575- SKU:
- 09350575
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
- PRODUCT NAME:
- SEAL
- APPLICATION:
- COUNTERSHAFT
- APPLICATION:
- TRANSMISSION
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$37.95Qty in Cart: 0Quantity:Price:$37.95Subtotal: -
HOT RODS Crankshaft Bearings - Honda K095
HOT RODS
$85.95Worn crankshaft bearings compromise engine reliability and can lead to catastrophic failure if left unchecked. The HOT RODS K095 Crankshaft Bearings kit delivers OEM-quality performance at a fraction...09240599- SKU:
- 09240599
- Availability:
- Ships Same Business Day
- Weight:
- 1.50 LBS
- PRODUCT NAME:
- BEARING
- RIDING STYLE:
- STREET
- UNITS:
- KIT
- APPLICATION:
- CRANKSHAFT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- ENGINE
$85.95 -
HOT RODS Top End Bearing WB102
HOT RODS
$21.95The piston end of your connecting rod demands precision engineering to handle extreme reciprocating forces without wear or failure. A quality needle-cage bearing like the HOT RODS WB102 reduces...09240567- SKU:
- 09240567
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- TYPE:
- WRIST PIN
- PRODUCT NAME:
- BEARING
- UNITS:
- EACH
- APPLICATION:
- CONNECTING ROD
- RIDING STYLE:
- OFF-ROAD
$21.95 -
HOT RODS Connecting Rod 8619
HOT RODS
$232.95Whether you're rebuilding a tired engine or pushing your performance platform to the next level, connecting rod integrity is non-negotiable. The HOT RODS 8619 delivers the strength and precision...09230043- SKU:
- 09230043
- Availability:
- Ships Same Business Day
- Weight:
- 1.31 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- ENGINE TYPE:
- 4-CYCLE
- MATERIAL:
- 8620 STEEL
- PRODUCT NAME:
- CONNECTING ROD KIT
$232.95Qty in Cart: 0Quantity:Price:$232.95Subtotal: -
HOT RODS Connecting Rod 8643
HOT RODS
$232.95If you're building or rebuilding a high-performance engine, your connecting rods are the backbone of reliability under extreme loads and RPM. The HOT RODS 8643 is engineered with the metallurgy and...09230063- SKU:
- 09230063
- Availability:
- Ships Same Business Day
- Weight:
- 1.76 LBS
- PRODUCT NAME:
- CONNECTING ROD KIT
- MATERIAL:
- 8620 STEEL
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- ENGINE TYPE:
- 4-CYCLE
$232.95 -
HOT RODS Crankshaft Kit CBK0175
HOT RODS
$716.95If you're building a high-performance engine or need reliable bottom-end durability, a quality crankshaft assembly is non-negotiable. The HOT RODS Crankshaft Kit CBK0175 delivers factory-matched...09210481- SKU:
- 09210481
- Availability:
- Ships Same Business Day
- Weight:
- 13.45 LBS
- PRODUCT NAME:
- CRANKSHAFT KIT
- TYPE:
- OEM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$716.95 -
HOT RODS Crankshaft Kit CBK0176
HOT RODS
$768.95If you're building a high-performance engine or rebuilding a tired block, the HOT RODS Crankshaft Kit CBK0176 gives you factory-spec reliability with performance-grade durability. This complete...09210482- SKU:
- 09210482
- Availability:
- Ships Same Business Day
- Weight:
- 13.50 LBS
- PRODUCT NAME:
- CRANKSHAFT KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- STROKER
- UNITS:
- KIT
$768.95 -
HOT RODS Connecting Rod 8188
HOT RODS
$200.95If you're building or rebuilding an engine that sees sustained high-RPM operation, connecting rod failure isn't an option—it's a catastrophic outcome. The HOT RODS 8188 delivers the strength and...09230326- SKU:
- 09230326
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
- MATERIAL:
- 8620 STEEL
- RIDING STYLE:
- SNOW
- ENGINE TYPE:
- 2-CYCLE
- FEATURES:
- INCLUDES THRUST WASHERS
- PRODUCT NAME:
- CONNECTING ROD KIT
- UNITS:
- KIT
$200.95 -
HOT RODS Connecting Rod 8189
HOT RODS
$208.95When you're pushing an engine to its limits, the connecting rod is the critical link between piston speed and crankshaft reliability. The HOT RODS 8189 is built to withstand the extreme pressures of...09230327- SKU:
- 09230327
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
- MATERIAL:
- 8620 STEEL
- ENGINE TYPE:
- 2-CYCLE
- RIDING STYLE:
- SNOW
- FEATURES:
- INCLUDES THRUST WASHERS
- PRODUCT NAME:
- CONNECTING ROD KIT
- UNITS:
- KIT
$208.95 -
HOT RODS Connecting Rod 8710
HOT RODS
$397.95When you're pushing your engine to the limit, stock connecting rods become your weakest link. The HOT RODS 8710 is engineered to handle extreme rpm, heavy loads, and sustained high-performance...09230375- SKU:
- 09230375
- Availability:
- Ships Same Business Day
- Weight:
- 1.43 LBS
- MATERIAL:
- 8620 STEEL
- PRODUCT NAME:
- CONNECTING ROD KIT
- UNITS:
- KIT
- ENGINE TYPE:
- 4-CYCLE
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
$397.95 -
HOT RODS Connecting Rod 8714
HOT RODS
$151.95If you're pushing your engine to higher RPM levels, factory connecting rods won't cut it—they'll fatigue and fail under sustained load. The HOT RODS 8714 replaces that weak link with heavy-duty...09230515- SKU:
- 09230515
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
- MATERIAL:
- 8620 STEEL
- PRODUCT NAME:
- CONNECTING ROD KIT
- RIDING STYLE:
- OFF-ROAD
- ENGINE TYPE:
- 2-CYCLE
- FEATURES:
- INCLUDES THRUST WASHERS
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- UNITS:
- KIT
$151.95Qty in Cart: 0Quantity:Price:$151.95Subtotal: -
HOT RODS Connecting Rod 8717
HOT RODS
$232.95When you're pushing your engine to the limit, your connecting rods are the unsung heroes keeping everything together. The HOT RODS 8717 is engineered for serious duty—built from certified 8620 AISI...09230520- SKU:
- 09230520
- Availability:
- Ships Same Business Day
- Weight:
- 1.35 LBS
- PRODUCT NAME:
- CONNECTING ROD KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- FEATURES:
- INCLUDES THRUST WASHERS
- ENGINE TYPE:
- 4-CYCLE
- MATERIAL:
- 8620 STEEL
$232.95
