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...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...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
$42.95 -
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...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...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...M817489- SKU:
- M817489
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- TYPE:
- CLUTCH COVER
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
$6.43 -
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...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...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...M817507- SKU:
- M817507
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CLUTCH COVER
- UNITS:
- EACH
$6.75 -
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...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...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...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...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...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
$25.56 -
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...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...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
$98.45 -
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...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...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...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...09341007- SKU:
- 09341007
- Availability:
- Ships Same Business Day
- Weight:
- 0.26 LBS
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- GASKET
- TYPE:
- TOP END
- UNITS:
- KIT
$32.09 -
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...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
