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
MOOSE RACING Clutch Cover - Beta D70-5435MB
MOOSE RACING
MSRP: $204.95Now: $131.00Was: $204.95A clutch cover failure can sideline your bike mid-race or ride. The MOOSE RACING Clutch Cover elevates your drivetrain reliability with aircraft-grade aluminum construction that outperforms OEM...09401853- SKU:
- 09401853
- Availability:
- Ships Same Business Day
- Weight:
- 2.12 LBS
- UNITS:
- EACH
- PRODUCT NAME:
- COVER
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CLUTCH
MSRP: $204.95Now: $131.00Was: $204.95 -
MOOSE RACING Clutch Cover - KTM/Husqvarna D70-5428MB
MOOSE RACING
$159.95A stock clutch cover is often your bike's first casualty under sustained performance riding. The MOOSE RACING clutch cover upgrades you to aircraft-quality aluminum that outperforms OEM...09401854- SKU:
- 09401854
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- UNITS:
- EACH
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CLUTCH
$159.95 -
MOOSE RACING Clutch Cover - Suzuki 450Z D70-3422MB
MOOSE RACING
$157.95A stock clutch cover can only handle so much abuse before it becomes a liability. The MOOSE RACING Clutch Cover for Suzuki 450Z upgrades you to aircraft-grade aluminum construction that outperforms...09401861- SKU:
- 09401861
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
- TYPE:
- CLUTCH
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- COVER
- UNITS:
- EACH
$157.95 -
MOOSE RACING Motor Gasket Kit with Seal - KDX200 811442
MOOSE RACING
$84.39A complete engine and transmission rebuild requires precision gaskets and seals that won't compromise your work. This Moose Racing kit delivers OEM-equivalent quality at a fraction of the cost,...M811442- SKU:
- M811442
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- TYPE:
- COMPLETE
- TYPE:
- ENGINE
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- UNITS:
- KIT
$84.39Qty in Cart: 0Quantity:Price:$84.39Subtotal: -
MOOSE RACING Motor Gasket Kit with Seal - KX250 811454
MOOSE RACING
$70.33A complete engine and transmission rebuild demands precision gaskets and seals that won't compromise your work—and OEM replacements often come with OEM pricing. The MOOSE RACING Motor Gasket Kit...M811454- SKU:
- M811454
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
$70.33 -
MOOSE RACING Motor Gasket Kit with Seal - KX250 811455
MOOSE RACING
$70.33A complete engine and transmission rebuild demands precision-fit gaskets and seals—and OEM pricing shouldn't force you to choose between quality and cost. This Moose Racing Motor Gasket Kit delivers...M811455- SKU:
- M811455
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET
$70.33 -
MOOSE RACING Motor Gasket Kit with Seal - KX250 811457
MOOSE RACING
$89.83A complete engine and transmission rebuild demands precision-fit gaskets and seals—factory tolerances won't tolerate improvisation. MOOSE Racing delivers OEM-quality replacement seals at a fraction...M811457- SKU:
- M811457
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- TYPE:
- ENGINE
$89.83Qty in Cart: 0Quantity:Price:$89.83Subtotal: -
MOOSE RACING Motor Gasket Kit with Seal - CR80 811205
MOOSE RACING
$70.33A complete engine and transmission rebuild demands precision gaskets and seals that won't compromise your performance or reliability. MOOSE RACING delivers OEM-quality components at a fraction of...M811205- SKU:
- M811205
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- TYPE:
- ENGINE
$70.33Qty in Cart: 0Quantity:Price:$70.33Subtotal: -
MOOSE RACING Motor Gasket Kit with Seal - CR80 811206
MOOSE RACING
$74.68A complete engine and transmission rebuild demands precision-fit gaskets and seals that won't fail under load. This MOOSE RACING Motor Gasket Kit eliminates the guesswork of sourcing individual...M811206- SKU:
- M811206
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- TYPE:
- ENGINE
$74.68 -
MOOSE RACING Motor Gasket Kit with Seal - XR80 811207
MOOSE RACING
$70.33A complete engine and transmission rebuild demands precision-fit gaskets and seals that won't compromise your work—OEM-spec components at a fraction of the cost. MOOSE Racing delivers genuine...M811207- SKU:
- M811207
- Availability:
- Ships Same Business Day
- Weight:
- 0.22 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- TYPE:
- ENGINE
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
$70.33 -
MOOSE RACING Motor Gasket Kit with Seal - XR80 811208
MOOSE RACING
$89.83A complete engine and transmission rebuild demands precision gaskets and seals that won't compromise your work or drain your budget. The MOOSE RACING Motor Gasket Kit delivers OEM-quality replacement...M811208- SKU:
- M811208
- Availability:
- Ships Same Business Day
- Weight:
- 0.22 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- PRODUCT NAME:
- GASKET
- TYPE:
- ENGINE
- UNITS:
- KIT
$89.83 -
MOOSE RACING Motor Gasket Kit with Seal - XR100 811221
MOOSE RACING
$92.89A complete engine and transmission rebuild demands precision gaskets and seals that won't compromise your work—or your wallet. This MOOSE RACING kit delivers OEM-quality components at a fraction of...M811221- SKU:
- M811221
- Availability:
- Ships Same Business Day
- Weight:
- 0.24 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- TYPE:
- ENGINE
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
$92.89 -
MOOSE RACING Motor Gasket Kit with Seal - CR125 811236
MOOSE RACING
$102.70A complete engine and transmission rebuild demands gaskets and seals that match OEM precision without the premium price tag. This MOOSE RACING kit eliminates the need to source components piecemeal,...M811236- SKU:
- M811236
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET
$102.70 -
MOOSE RACING Motor Seals - CRF450R 822330
MOOSE RACING
$63.58Engine seals wear with every heat cycle, and compromised seals lead to oil leaks, contamination, and catastrophic failure. MOOSE Racing Motor Seals give you OEM-equivalent reliability at a fraction...09350272- SKU:
- 09350272
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 LBS
- APPLICATION:
- ENGINE
- PRODUCT NAME:
- SEAL
- UNITS:
- SET
- TYPE:
- OIL
- RIDING STYLE:
- OFF-ROAD
$63.58Qty in Cart: 0Quantity:Price:$63.58Subtotal: -
MOOSE RACING Motor Seals - KTM/Husqvarna 822264
MOOSE RACING
$54.39Engine seals are critical wear items that directly impact oil containment, compression integrity, and long-term engine reliability. MOOSE RACING Motor Seals deliver OEM-equivalent fitment and...09350946- SKU:
- 09350946
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- OIL
- APPLICATION:
- ENGINE
- PRODUCT NAME:
- SEAL
- UNITS:
- SET
$54.39 -
MOOSE RACING Motor Seals - KX450F 822485
MOOSE RACING
$35.81Engine seals are critical wear items that directly impact oil containment, compression integrity, and long-term engine reliability. MOOSE Racing Motor Seals deliver OEM-equivalent performance at a...09350950- SKU:
- 09350950
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- PRODUCT NAME:
- SEAL
- TYPE:
- OIL
- APPLICATION:
- ENGINE
- UNITS:
- SET
- RIDING STYLE:
- OFF-ROAD
$35.81Qty in Cart: 0Quantity:Price:$35.81Subtotal: -
MOOSE RACING Complete Motor Gasket Kit - KX250F 808984
MOOSE RACING
$142.06A complete engine and transmission rebuild demands precision-fit gaskets and seals that won't compromise your work. The MOOSE RACING Complete Motor Gasket Kit delivers OEM-quality components at a...09345881- SKU:
- 09345881
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- GASKET
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
$142.06Qty in Cart: 0Quantity:Price:$142.06Subtotal: -
MOOSE RACING Complete Motor Gasket Kit - CRF450R/RX 808989
MOOSE RACING
$179.72A complete engine and transmission rebuild demands precision gaskets and seals that won't compromise performance or longevity. The MOOSE RACING Complete Motor Gasket Kit eliminates the guesswork and...09345882- SKU:
- 09345882
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- TYPE:
- ENGINE
$179.72 -
MOOSE RACING Complete Motor Gasket Kit - 250 EXC-F 808990
MOOSE RACING
$130.03A complete engine and transmission rebuild demands precision-fit gaskets and seals that won't compromise your work. This MOOSE RACING kit eliminates the frustration of sourcing individual components,...09345883- SKU:
- 09345883
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- TYPE:
- ENGINE
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
$130.03 -
MOOSE RACING Top End Gasket Kit Yamaha 810977
MOOSE RACING
$67.11A top-end rebuild demands precision-fit gaskets and seals that won't compromise your engine's integrity or performance. The MOOSE RACING Top End Gasket Kit delivers OEM-quality replacement seals at a...09345884- SKU:
- 09345884
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- SET
$67.11
