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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MOOSE RACING Case Saver - KX450F 0950-0518
MOOSE RACING
$27.95Engine case damage from crashes, debris, or track contact can sideline your KX450F and drain your wallet fast. The MOOSE RACING Case Saver replaces flimsy OEM plastic guards with precision-engineered aluminum protection that actually withstands impact...09500518- SKU:
- 09500518
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- MATERIAL:
- 6061 ALUMINUM
- UNITS:
- EACH
- BASE COLOR:
- SILVER
- PRODUCT NAME:
- CASE SAVER
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- COLOR/FINISH:
- ALUMINUM
$27.95 -
MOOSE RACING Clutch Cylinder Guard - Beta 13-400
MOOSE RACING
$42.95Hydraulic clutch cylinders are vulnerable components exposed to chain strike and impact during aggressive riding—damage means loss of clutch control and a derailed ride. This MOOSE RACING guard shields that critical cylinder while integrated knockdown...09500606- SKU:
- 09500606
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- CASE SAVER
- RIDING STYLE:
- STREET
- UNITS:
- KIT
- TYPE:
- SLAVE CYLINDER
- COLOR/FINISH:
- ANODIZED
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- OFF-ROAD
$42.95Qty in Cart: 0Quantity:Price:$42.95Subtotal: -
MOOSE RACING Clutch Cylinder Guard - KTM 13-016
MOOSE RACING
$42.95Protect your KTM's hydraulic clutch cylinder from impact damage and chain slap with this purpose-built guard. The MOOSE RACING clutch cylinder guard combines functional knockdown bars with sleek aesthetics, keeping your clutch system safe during...09500758- SKU:
- 09500758
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
- TYPE:
- SLAVE CYLINDER
- COLOR/FINISH:
- ANODIZED
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- OFF-ROAD
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- CASE SAVER
- RIDING STYLE:
- STREET
- UNITS:
- KIT
$42.95 -
MOOSE RACING Clutch Cover Gasket 817486
MOOSE RACING
$10.29A leaking clutch cover gasket compromises engine sealing and can lead to oil loss and contamination—exactly why you need a precision replacement that matches OEM specifications. The MOOSE RACING Clutch Cover Gasket 817486 uses high-tech materials...M817486- SKU:
- M817486
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- TYPE:
- CLUTCH COVER
- UNITS:
- EACH
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
$10.29 -
MOOSE RACING Clutch Cover Gasket 817489
MOOSE RACING
$6.43A failing clutch cover gasket can lead to oil seepage, contamination, and premature wear on your clutch assembly—compromising both reliability and performance. The MOOSE RACING Clutch Cover Gasket 817489 delivers OEM-equivalent fitment and durability at...M817489- SKU:
- M817489
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- TYPE:
- CLUTCH COVER
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
$6.43Qty in Cart: 0Quantity:Price:$6.43Subtotal: -
MOOSE RACING Clutch Cover Gasket 817496
MOOSE RACING
$11.64A leaking clutch cover gasket compromises both engine performance and reliability—allowing oil seepage that can damage internal components and create a messy engine bay. The MOOSE RACING Clutch Cover Gasket delivers OEM-quality sealing with precision...M817496- SKU:
- M817496
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- TYPE:
- CLUTCH COVER
- UNITS:
- EACH
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
$11.64Qty in Cart: 0Quantity:Price:$11.64Subtotal: -
MOOSE RACING Ignition Cover Gasket 817504
MOOSE RACING
$6.88A leaking ignition cover gasket compromises engine sealing and can lead to oil weeping that accelerates wear on surrounding components. The MOOSE RACING Ignition Cover Gasket delivers OEM-grade durability at a fraction of the cost, giving you the...M817504- SKU:
- M817504
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- IGNITION COVER
- UNITS:
- EACH
$6.88 -
MOOSE RACING Clutch Cover Gasket 817507
MOOSE RACING
$6.75A leaking clutch cover gasket compromises engine sealing and can lead to oil loss and contamination—a problem that demands an immediate, reliable solution. The MOOSE RACING Clutch Cover Gasket 817507 delivers OEM-equivalent sealing performance at a...M817507- SKU:
- M817507
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CLUTCH COVER
- UNITS:
- EACH
$6.75Qty in Cart: 0Quantity:Price:$6.75Subtotal: -
MOOSE RACING Motor Gasket Kit with Seal - KTM 250SX/EXC 811300
MOOSE RACING
$90.04A complete engine and transmission rebuild demands precision components—and OEM gasket kits often come with premium pricing that leaves your budget depleted. The MOOSE RACING Motor Gasket Kit delivers full coverage at a fraction of OEM cost, so you can...09340104- SKU:
- 09340104
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- TYPE:
- ENGINE
- PRODUCT NAME:
- GASKET
$90.04 -
MOOSE RACING Motor Gasket Kit with Seal - KTM 65SX 811302
MOOSE RACING
$89.83A complete engine and transmission rebuild demands precision-fitted gaskets and seals—compromise here and you're risking oil leaks, contamination, and catastrophic failure down the line. The MOOSE RACING Motor Gasket Kit delivers OEM-quality seals at a...09340106- SKU:
- 09340106
- Availability:
- Ships Same Business Day
- Weight:
- 0.55 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- TYPE:
- ENGINE
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
$89.83 -
MOOSE RACING Motor Gasket Kit with Seal - KTM 125SX/EXC 811303
MOOSE RACING
$90.04A complete engine and transmission rebuild demands precision-fit gaskets and seals that won't compromise your KTM's performance or reliability. This Moose Racing kit eliminates the guesswork and expense of sourcing individual OEM components, giving you...09340107- SKU:
- 09340107
- Availability:
- Ships Same Business Day
- Weight:
- 0.26 LBS
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
$90.04 -
MOOSE RACING Motor Seals - YZ125 822172
MOOSE RACING
$32.97Engine seal failures compromise compression, invite contamination, and can sideline your YZ125 when you need it most. MOOSE Racing Motor Seals deliver OEM-equivalent fitment and durability at a fraction of OEM pricing, letting you rebuild with confidence...M822172- SKU:
- M822172
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- SEAL
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- ENGINE
- UNITS:
- SET
- TYPE:
- OIL
$32.97 -
MOOSE RACING Motor Seals - YZ85 822173
MOOSE RACING
$25.56Engine seals are critical wear items that directly impact compression, oil containment, and longevity. OEM replacement seals can drain your budget fast, but MOOSE Racing motor seals deliver genuine OEM-equivalent performance at a fraction of the cost...M822173- SKU:
- M822173
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- SEAL
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- ENGINE
- TYPE:
- OIL
- UNITS:
- SET
$25.56Qty in Cart: 0Quantity:Price:$25.56Subtotal: -
MOOSE RACING Motor Seals - YZ/WR 250F 822175
MOOSE RACING
$32.32OEM gasket and seal failures can compromise engine integrity and lead to costly leaks during critical race conditions or trail rides. The MOOSE RACING Motor Seals deliver genuine OEM-quality replacement seals at a fraction of the cost, allowing you to...M822175- SKU:
- M822175
- Availability:
- Ships Same Business Day
- Weight:
- 0.14 LBS
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- ENGINE
- TYPE:
- OIL
- PRODUCT NAME:
- SEAL
- UNITS:
- SET
$32.32 -
MOOSE RACING Motor Gasket Kit with Seal - KTM200SX 811308
MOOSE RACING
$98.45A complete engine and transmission rebuild demands precision components that won't compromise your build quality or strain your budget. This MOOSE RACING gasket and seal kit delivers OEM-equivalent performance at a fraction of the cost, giving you the...09340111- SKU:
- 09340111
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- TYPE:
- ENGINE
- PRODUCT NAME:
- GASKET
$98.45Qty in Cart: 0Quantity:Price:$98.45Subtotal: -
MOOSE RACING Motor Gasket Kit with Seal - KTM125SX/EXC 811309
MOOSE RACING
$103.61A complete engine and transmission rebuild demands precision-fit gaskets and seals—compromising on quality here invites oil leaks, contamination, and premature failure. The MOOSE RACING Motor Gasket Kit eliminates the frustration of sourcing individual...09340112- SKU:
- 09340112
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET
- TYPE:
- ENGINE
$103.61 -
MOOSE RACING Motor Gasket Kit with Seal - KLR/DRZ110 811415
MOOSE RACING
$91.21A complete engine and transmission rebuild demands precision-fit gaskets and seals that won't compromise your work. This MOOSE RACING kit eliminates the guesswork and expense of sourcing individual components, giving you everything needed for a reliable...09340113- SKU:
- 09340113
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- TYPE:
- ENGINE
$91.21 -
MOOSE RACING Motor Gasket Kit with Seal - KX125 811430
MOOSE RACING
$118.19A complete engine and transmission rebuild demands precision-fit gaskets and seals that won't compromise your work or wallet. The MOOSE RACING Motor Gasket Kit delivers OEM-quality components at a fraction of OEM pricing, letting you rebuild with...09340114- SKU:
- 09340114
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- ENGINE TYPE:
- 2-STROKE
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
$118.19 -
MOOSE RACING Top End Gasket Kit - TE-250SX/EXC 810327
MOOSE RACING
$32.09A top-end rebuild demands precision gaskets and seals that won't compromise engine integrity or cost you a fortune. The MOOSE RACING Top End Gasket Kit eliminates the guesswork with a complete, U.S.-manufactured set designed specifically for the...09341007- SKU:
- 09341007
- Availability:
- Ships Same Business Day
- Weight:
- 0.26 LBS
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- GASKET
- TYPE:
- TOP END
- UNITS:
- KIT
$32.09Qty in Cart: 0Quantity:Price:$32.09Subtotal: -
MOOSE RACING Motor Gasket Kit with Seal - KTM 811327
MOOSE RACING
$105.55A complete engine and transmission rebuild demands precision-fit gaskets and seals—factory tolerances won't accept substitutes. MOOSE Racing delivers OEM-equivalent components at a fraction of dealership pricing, letting you rebuild with confidence...09341008- SKU:
- 09341008
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- TYPE:
- ENGINE
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
$105.55
