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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ATHENA Water Pump Gasket Kit - Kawasaki P400250475016
ATHENA
$69.95Include water pump gasket, clutch cover gasket, water pump shaft oil seals and washers, Kit contents will vary slightly based on application, Kits do not contain replacement bearings09346378- SKU:
- 09346378
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 LBS
- TYPE:
- WATER PUMP
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$69.95 -
ATHENA Water Pump Gasket Kit - KTM/Husqvarna P400270475019
ATHENA
$49.95Include water pump gasket, clutch cover gasket, water pump shaft oil seals and washers, Kit contents will vary slightly based on application, Kits do not contain replacement bearings09346380- SKU:
- 09346380
- Availability:
- Ships Same Business Day
- Weight:
- 0.56 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- WATER PUMP
$49.95 -
ATHENA Water Pump Gasket Kit - KTM/Husqvarna P400270475020
ATHENA
$61.95Include water pump gasket, clutch cover gasket, water pump shaft oil seals and washers, Kit contents will vary slightly based on application, Kits do not contain replacement bearings09346381- SKU:
- 09346381
- Availability:
- Ships Same Business Day
- Weight:
- 0.41 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP
- UNITS:
- KIT
$61.95 -
ATHENA Top End Gasket Kit - KTM P400270600092
ATHENA
$73.95Specifically designed for the pro, semi-pro and amateur rider who freshens up their engine prior to a race or during midseason. Gives the rider a choice of using standard gas with stock compression, or race gas with a higher compression. Kits do not...09346460- SKU:
- 09346460
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- TYPE:
- TOP END
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET KIT
$73.95 -
ATHENA Connecting Rod Kit P40321010
ATHENA
$112.95High-quality, lightweight connecting rods, Made with similar materials to the OEM component to ensure the same performance, Superficial high-frequency treatment for higher resistance that reduces rotational and alternating stresses, Kits include...09230472- SKU:
- 09230472
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- UNITS:
- KIT
- DISPLACEMENT:
- 125 CC
- PRODUCT NAME:
- CONNECTING ROD KIT
- RIDING STYLE:
- OFF-ROAD
$112.95 -
ATHENA Connecting Rod Kit P40321011
ATHENA
$128.95High-quality, lightweight connecting rods, Made with similar materials to the OEM component to ensure the same performance, Superficial high-frequency treatment for higher resistance that reduces rotational and alternating stresses, Kits include...09230473- SKU:
- 09230473
- Availability:
- Ships Same Business Day
- Weight:
- 1.05 LBS
- DISPLACEMENT:
- 250 CC
- PRODUCT NAME:
- CONNECTING ROD KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$128.95 -
ATHENA Connecting Rod Kit P40321012
ATHENA
$156.95High-quality, lightweight connecting rods, Made with similar materials to the OEM component to ensure the same performance, Superficial high-frequency treatment for higher resistance that reduces rotational and alternating stresses, Kits include...09230474- SKU:
- 09230474
- Availability:
- Ships Same Business Day
- Weight:
- 1.21 LBS
- PRODUCT NAME:
- CONNECTING ROD KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- DISPLACEMENT:
- 250 CC
$156.95 -
ATHENA Connecting Rod Kit P40321013
ATHENA
$160.95High-quality, lightweight connecting rods, Made with similar materials to the OEM component to ensure the same performance, Superficial high-frequency treatment for higher resistance that reduces rotational and alternating stresses, Kits include...09230475- SKU:
- 09230475
- Availability:
- Ships Same Business Day
- Weight:
- 1.60 LBS
- DISPLACEMENT:
- 450 CC
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- CONNECTING ROD KIT
$160.95 -
ATHENA Connecting Rod Kit P40321031
ATHENA
$103.95High-quality, lightweight connecting rods, Made with similar materials to the OEM component to ensure the same performance, Superficial high-frequency treatment for higher resistance that reduces rotational and alternating stresses, Kits include...09230477- SKU:
- 09230477
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- DISPLACEMENT:
- 65 CC
- PRODUCT NAME:
- CONNECTING ROD KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- DISPLACEMENT:
- 60 CC
$103.95Qty in Cart: 0Quantity:Price:$103.95Subtotal: -
ATHENA Connecting Rod Kit P40321033
ATHENA
$115.95High-quality, lightweight connecting rods, Made with similar materials to the OEM component to ensure the same performance, Superficial high-frequency treatment for higher resistance that reduces rotational and alternating stresses, Kits include...09230479- SKU:
- 09230479
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- PRODUCT NAME:
- CONNECTING ROD KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- DISPLACEMENT:
- 125 CC
$115.95 -
ATHENA Connecting Rod Kit P40321034
ATHENA
$121.95High-quality, lightweight connecting rods, Made with similar materials to the OEM component to ensure the same performance, Superficial high-frequency treatment for higher resistance that reduces rotational and alternating stresses, Kits include...09230480- SKU:
- 09230480
- Availability:
- Ships Same Business Day
- Weight:
- 1.10 LBS
- PRODUCT NAME:
- CONNECTING ROD KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- DISPLACEMENT:
- 250 CC
- RIDING STYLE:
- STREET
$121.95 -
ATHENA Connecting Rod Kit P40321035
ATHENA
$160.95High-quality, lightweight connecting rods, Made with similar materials to the OEM component to ensure the same performance, Superficial high-frequency treatment for higher resistance that reduces rotational and alternating stresses, Kits include...09230483- SKU:
- 09230483
- Availability:
- Ships Same Business Day
- Weight:
- 1.20 LBS
- PRODUCT NAME:
- CONNECTING ROD KIT
- RIDING STYLE:
- OFF-ROAD
- DISPLACEMENT:
- 450 CC
- RIDING STYLE:
- STREET
- UNITS:
- KIT
$160.95 -
ATHENA Connecting Rod Kit P40321015
ATHENA
$112.95High-quality, lightweight connecting rods, Made with similar materials to the OEM component to ensure the same performance, Superficial high-frequency treatment for higher resistance that reduces rotational and alternating stresses, Kits include...09230500- SKU:
- 09230500
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- DISPLACEMENT:
- 125 CC
- PRODUCT NAME:
- CONNECTING ROD KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- RIDING STYLE:
- STREET
$112.95Qty in Cart: 0Quantity:Price:$112.95Subtotal: -
ATHENA Connecting Rod Kit P40321016
ATHENA
$112.95High-quality, lightweight connecting rods, Made with similar materials to the OEM component to ensure the same performance, Superficial high-frequency treatment for higher resistance that reduces rotational and alternating stresses, Kits include...09230501- SKU:
- 09230501
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- PRODUCT NAME:
- CONNECTING ROD KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- DISPLACEMENT:
- 125 CC
$112.95 -
ATHENA Connecting Rod Kit P40321017
ATHENA
$112.95High-quality, lightweight connecting rods, Made with similar materials to the OEM component to ensure the same performance, Superficial high-frequency treatment for higher resistance that reduces rotational and alternating stresses, Kits include...09230502- SKU:
- 09230502
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- DISPLACEMENT:
- 125 CC
- PRODUCT NAME:
- CONNECTING ROD KIT
$112.95 -
ATHENA Connecting Rod Kit P40321020
ATHENA
$156.95High-quality, lightweight connecting rods, Made with similar materials to the OEM component to ensure the same performance, Superficial high-frequency treatment for higher resistance that reduces rotational and alternating stresses, Kits include...09230504- SKU:
- 09230504
- Availability:
- Ships Same Business Day
- Weight:
- 1.20 LBS
- DISPLACEMENT:
- 250 CC
- RIDING STYLE:
- STREET
- DISPLACEMENT:
- 300 CC
- PRODUCT NAME:
- CONNECTING ROD KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$156.95 -
ATHENA Connecting Rod Kit P40321021
ATHENA
$156.95High-quality, lightweight connecting rods, Made with similar materials to the OEM component to ensure the same performance, Superficial high-frequency treatment for higher resistance that reduces rotational and alternating stresses, Kits include...09230505- SKU:
- 09230505
- Availability:
- Ships Same Business Day
- Weight:
- 1.15 LBS
- DISPLACEMENT:
- 250 CC
- PRODUCT NAME:
- CONNECTING ROD KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$156.95 -
ATHENA Connecting Rod Kit P40321024
ATHENA
$160.95High-quality, lightweight connecting rods, Made with similar materials to the OEM component to ensure the same performance, Superficial high-frequency treatment for higher resistance that reduces rotational and alternating stresses, Kits include...09230508- SKU:
- 09230508
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- DISPLACEMENT:
- 450 CC
- PRODUCT NAME:
- CONNECTING ROD KIT
$160.95 -
ATHENA Connecting Rod Kit P40321049
ATHENA
$181.95High-quality, lightweight connecting rods, Made with similar materials to the OEM component to ensure the same performance, Superficial high-frequency treatment for higher resistance that reduces rotational and alternating stresses, Kits include...09230574- SKU:
- 09230574
- Availability:
- Ships Same Business Day
- Weight:
- 1.31 LBS
- DISPLACEMENT:
- 250 CC
- PRODUCT NAME:
- CONNECTING ROD KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$181.95 -
ATHENA Connecting Rod Kit P40321050
ATHENA
$257.02High-quality, lightweight connecting rods, Made with similar materials to the OEM component to ensure the same performance, Superficial high-frequency treatment for higher resistance that reduces rotational and alternating stresses, Kits include...09230576- SKU:
- 09230576
- Availability:
- Ships Same Business Day
- Weight:
- 1.16 LBS
- PRODUCT NAME:
- CONNECTING ROD KIT
- RIDING STYLE:
- OFF-ROAD
- DISPLACEMENT:
- 250 CC
- RIDING STYLE:
- STREET
- UNITS:
- KIT
$257.02
