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
-
On Sale
ATHENA Top End Gasket Kit - Honda P400210600304
ATHENA
MSRP: $38.95Now: $35.00Was: $38.95Engine reliability is everything when you're on the line, and a fresh top end gasket kit is your insurance policy before race day. The ATHENA P400210600304 gives you the flexibility to optimize your power delivery—run premium race fuel with elevated...09344815- SKU:
- 09344815
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
MSRP: $38.95Now: $35.00Was: $38.95 -
On Sale
ATHENA Top End Gasket Kit - Yamaha P400485600004
ATHENA
MSRP: $12.95Now: $12.00Was: $12.95Whether you're prepping for race day or executing a midseason refresh, a quality top-end gasket kit is essential to maintaining cylinder head integrity and preventing catastrophic leaks. The ATHENA Top End Gasket Kit gives you the flexibility to tune...09344818- SKU:
- 09344818
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- KIT
MSRP: $12.95Now: $12.00Was: $12.95 -
On Sale
ATHENA Top End Gasket Kit P400210600065
ATHENA
MSRP: $42.95Now: $39.00Was: $42.95Whether you're prepping for race day or conducting a midseason engine refresh, the ATHENA Top End Gasket Kit P400210600065 delivers the reliability pro and amateur riders depend on. This kit lets you optimize your engine's compression strategy—run stock...09340200- SKU:
- 09340200
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- GASKET KIT
- MATERIAL:
- RUBBER
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- TOP END
MSRP: $42.95Now: $39.00Was: $42.95 -
On Sale
ATHENA Complete Gasket Kit - Kawasaki P400250850015
ATHENA
MSRP: $102.95Now: $93.00Was: $102.95When rebuilding a top-end or complete engine, gasket failure is the difference between a reliable rebuild and catastrophic coolant loss. The ATHENA Complete Gasket Kit delivers the precision sealing required for high-temperature racing environments, with...09340203- SKU:
- 09340203
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
MSRP: $102.95Now: $93.00Was: $102.95 -
On Sale
ATHENA Top End Gasket Kit - KTM/Husqvarna P400270600090
ATHENA
MSRP: $72.95Now: $66.00Was: $72.95Whether you're prepping for race day or executing a midseason engine refresh, the ATHENA Top End Gasket Kit delivers the reliability pro and amateur riders demand when freshening their two-stroke. This kit gives you the flexibility to run your engine on...09346351- SKU:
- 09346351
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- TOP END
- RIDING STYLE:
- STREET
MSRP: $72.95Now: $66.00Was: $72.95 -
On Sale
ATHENA Top End Gasket Kit - Kawasaki P400250600068
ATHENA
MSRP: $82.95Now: $75.00Was: $82.95A fresh top-end gasket set is essential maintenance before race season or mid-season rebuilds, ensuring proper compression sealing and preventing costly leaks under high-load conditions. The ATHENA P400250600068 kit gives you the flexibility to run...09346354- SKU:
- 09346354
- Availability:
- Ships Same Business Day
- Weight:
- 0.36 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- TOP END
MSRP: $82.95Now: $75.00Was: $82.95 -
On Sale
ATHENA Complete Gasket Kit - Kawasaki P400250900068
ATHENA
MSRP: $224.95Now: $202.00Was: $224.95A complete gasket failure can leave you stranded or cost thousands in engine damage. The ATHENA Complete Gasket Kit delivers OEM-equivalent sealing integrity across all critical surfaces, ensuring your Kawasaki P400 engine maintains compression and...09346355- SKU:
- 09346355
- Availability:
- Ships Same Business Day
- Weight:
- 0.46 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
MSRP: $224.95Now: $202.00Was: $224.95 -
On Sale
ATHENA Complete Gasket Kit - KTM P400270900088
ATHENA
MSRP: $205.95Now: $185.00Was: $205.95A complete gasket kit is essential for engine longevity and reliability—whether you're rebuilding after a major service or protecting against future failures. The ATHENA Complete Gasket Kit delivers OEM-quality sealing across all critical engine...09346356- SKU:
- 09346356
- Availability:
- Ships Same Business Day
- Weight:
- 0.26 LBS
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
MSRP: $205.95Now: $185.00Was: $205.95 -
On Sale
ATHENA Top End Gasket Kit - Yamaha P400485600198
ATHENA
MSRP: $31.95Now: $29.00Was: $31.95Whether you're prepping for race day or executing a midseason engine refresh, the ATHENA Top End Gasket Kit gives you the flexibility to optimize your engine's performance without a complete rebuild. This kit lets you choose between standard fuel with...09346357- SKU:
- 09346357
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
MSRP: $31.95Now: $29.00Was: $31.95Qty in Cart: 0Quantity:Price:MSRP: $31.95Now: $29.00Was: $31.95Subtotal: -
ACERBIS X-Power Cover Kit - Red - Honda 2791950227
ACERBIS
$67.95Engine covers endure constant exposure to mud, rocks, and debris—damage that compromises both aesthetics and engine protection. The ACERBIS X-Power Cover Kit shields your Honda's crankcase and clutch cover from impact and contamination while maintaining...09401892- SKU:
- 09401892
- Availability:
- Ships Same Business Day
- Weight:
- 1.40 LBS
- MODEL:
- X-POWER
- UNITS:
- KIT
- COLOR/FINISH:
- RED
- TYPE:
- ENGINE
- MATERIAL:
- PLASTIC
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- COVER
- PRODUCT NAME:
- COVER KIT
$67.95 -
ACERBIS X-Power Cover Kit - Black - Yamaha 2780680001
ACERBIS
$76.95Off-road riding exposes your engine to constant battering from rocks, mud, and debris—damage that compromises performance and shortens component lifespan. The ACERBIS X-Power Cover Kit shields your crankcase and clutch cover with molded plastic...09401893- SKU:
- 09401893
- Availability:
- Ships Same Business Day
- Weight:
- 0.95 LBS
- MODEL:
- X-POWER
- PRODUCT NAME:
- COVER
- TYPE:
- ENGINE
- MATERIAL:
- PLASTIC
- PRODUCT NAME:
- COVER KIT
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$76.95 -
ACERBIS X-Power Cover Kit - Black - Yamaha 2780690001
ACERBIS
$76.95Dirt, debris, and impact damage are constant threats to your engine's vulnerable crankcase and ignition covers during aggressive riding. The ACERBIS X-Power Cover Kit shields these critical components with molded, heat-resistant protection while...09401895- SKU:
- 09401895
- Availability:
- Ships Same Business Day
- Weight:
- 1.25 LBS
- MATERIAL:
- PLASTIC
- TYPE:
- ENGINE
- MODEL:
- X-POWER
- PRODUCT NAME:
- COVER
- PRODUCT NAME:
- COVER KIT
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$76.95 -
ACERBIS X-Power Cover Kit - Blue - Yamaha 2780690211
ACERBIS
$76.95Protect your engine from the trail abuse that comes with serious riding. The ACERBIS X-Power Cover Kit shields your crankcase and ignition/clutch cover from dirt, debris, and impact damage while maintaining unrestricted access to critical service points...09401896- SKU:
- 09401896
- Availability:
- Ships Same Business Day
- Weight:
- 1.30 LBS
- MATERIAL:
- PLASTIC
- TYPE:
- ENGINE
- COLOR/FINISH:
- BLUE
- MODEL:
- X-POWER
- PRODUCT NAME:
- COVER
- UNITS:
- KIT
- PRODUCT NAME:
- COVER KIT
- RIDING STYLE:
- OFF-ROAD
$76.95 -
ACERBIS X-Power Cover Kit - Black - Yamaha 2791690001
ACERBIS
$76.95Protecting your engine from track debris and impact damage isn't optional—it's essential for reliability and longevity. The ACERBIS X-Power Cover Kit shields your crankcase and ignition/clutch cover with durable, heat-resistant material that won't...09401897- SKU:
- 09401897
- Availability:
- Ships Same Business Day
- Weight:
- 1.40 LBS
- COLOR/FINISH:
- BLACK
- PRODUCT NAME:
- COVER
- PRODUCT NAME:
- COVER KIT
- RIDING STYLE:
- OFF-ROAD
- MODEL:
- X-POWER
- UNITS:
- KIT
- MATERIAL:
- PLASTIC
- TYPE:
- ENGINE
$76.95 -
ACERBIS X-Power Cover Kit - Black - KTM/Husqvarna 2709760001
ACERBIS
$76.95Dirt and debris are inevitable when pushing your KTM or Husqvarna to the limit, but unprotected engine cases aren't. The ACERBIS X-Power Cover Kit shields your crankcase and ignition/clutch cover from impact and contamination while maintaining stock...09401757- SKU:
- 09401757
- Availability:
- Ships Same Business Day
- Weight:
- 1.20 LBS
- MATERIAL:
- PLASTIC
- MODEL:
- X-POWER
- RIDING STYLE:
- STREET
- TYPE:
- ENGINE
- COLOR/FINISH:
- BLACK
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$76.95 -
ACERBIS X-Power Cover Kit - Orange - KTM/Husqvarna 2709760237
ACERBIS
$69.95Dirt, rocks, and debris are inevitable when pushing your KTM or Husqvarna to the limit—and unprotected engine covers pay the price. The ACERBIS X-Power Cover Kit shields your crankcase and clutch cover from impact and contamination while maintaining...09401759- SKU:
- 09401759
- Availability:
- Ships Same Business Day
- Weight:
- 1.21 LBS
- MATERIAL:
- PLASTIC
- MODEL:
- X-POWER
- RIDING STYLE:
- STREET
- TYPE:
- ENGINE
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- COLOR/FINISH:
- ORANGE
$69.95 -
ACERBIS X-Power Cover Kit - Black - KTM/Husqvarna 2731970001
ACERBIS
$76.95Dirt, rocks, and impact are constant threats to your engine cases on the trail or track. The ACERBIS X-Power Cover Kit shields your crankcase and clutch cover with durable, heat-resistant protection while maintaining full functionality and serviceability...09401760- SKU:
- 09401760
- Availability:
- Ships Same Business Day
- Weight:
- 1.41 LBS
- PRODUCT NAME:
- COVER
- MATERIAL:
- PLASTIC
- MODEL:
- X-POWER
- RIDING STYLE:
- STREET
- TYPE:
- ENGINE
- COLOR/FINISH:
- BLACK
- UNITS:
- KIT
$76.95 -
ACERBIS X-Power Cover Kit - Orange - KTM/Husqvarna 2731975226
ACERBIS
$67.95Protect your engine from the abuse of off-road riding with the ACERBIS X-Power Cover Kit. Dirt, rocks, and debris constantly threaten your crankcase and ignition covers—this kit shields critical engine components without compromising access or airflow...09401761- SKU:
- 09401761
- Availability:
- Ships Same Business Day
- Weight:
- 1.46 LBS
- COLOR/FINISH:
- ORANGE
- TYPE:
- ENGINE
- MATERIAL:
- PLASTIC
- PRODUCT NAME:
- COVER
- UNITS:
- KIT
- MODEL:
- X-POWER
- RIDING STYLE:
- STREET
$67.95Qty in Cart: 0Quantity:Price:$67.95Subtotal: -
JAGG OIL COOLERS Universal 14-Row Oil Cooler with Tabs 3080
JAGG OIL COOLERS
$274.95Jagg Universal Oil Cooler Cores are the very same oil coolers that are used in high-quality Jagg kits, These units are perfect for the customizer, the fabricator, and the racer, Supplied as oil cooler only, Mounting hardware sold separately07130206- SKU:
- 07130206
- Availability:
- Ships Same Business Day
- Weight:
- 1.95 LBS
- COLOR/FINISH:
- BLACK
- MOUNTING POSITION:
- BOTTOM
- MOUNTING POSITION:
- TOP
- MOUNTING STYLE:
- TABS
- PRODUCT NAME:
- OIL COOLER
- STYLE:
- STRAIGHT
- TYPE:
- 14-ROW
- UNITS:
- EACH
- BASE FINISH:
- POWDER-COATED
- COLOR/FINISH:
- GLOSS
- BASE COLOR:
- BLACK
- RIDING STYLE:
- STREET
$274.95 -
JAGG OIL COOLERS Universal 10-Row Oil Cooler 3140
JAGG OIL COOLERS
$239.95Jagg Universal Oil Cooler Cores are the very same oil coolers that are used in high-quality Jagg kits, These units are perfect for the customizer, the fabricator, and the racer, Supplied as oil cooler only, Mounting hardware sold separately07130212- SKU:
- 07130212
- Availability:
- Ships Same Business Day
- Weight:
- 1.35 LBS
- MOUNTING POSITION:
- TOP
- PRODUCT NAME:
- OIL COOLER
- STYLE:
- 90°
- COLOR/FINISH:
- BLACK
- COLOR/FINISH:
- GLOSS
- MOUNTING STYLE:
- THREADED
- BASE COLOR:
- BLACK
- TYPE:
- 10-ROW
- UNITS:
- EACH
- BASE FINISH:
- POWDER-COATED
- RIDING STYLE:
- STREET
$239.95
