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
-
MOOSE RACING Top End Gasket Kit - RM 125 810547
MOOSE RACING
$27.64Moose can now handle all your gasket and seal needs at a fraction of OEM cost, High-tech materials provide unmatched reliability and performance, Rebuild the engine and transmission with total confidence as each set is designed for durability and...M810547- SKU:
- M810547
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$27.64Qty in Cart: 0Quantity:Price:$27.64Subtotal: -
MOOSE RACING Motor Gasket Kit with Seal - KDX200 811440
MOOSE RACING
$86.76Moose can now handle all your gasket and seal needs at a fraction of OEM cost, Rebuild the engine and transmission with total confidence as each set is designed for durability and accurate fit, Oil seals are genuine OEM replacement seals, Sets include...M811440- SKU:
- M811440
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- UNITS:
- KIT
- TYPE:
- COMPLETE
- TYPE:
- ENGINE
$86.76Qty in Cart: 0Quantity:Price:$86.76Subtotal: -
MOOSE RACING Water Pump Rebuild Kit 821577
MOOSE RACING
$54.29Include every gasket, O-ring, bearing and seal required to rebuild a water pump, Typical kit includes the following: bearings where applicable; rubber seals; mechanical water pump seal where applicable; side cover gasket; water pump gasket; snap rings...09345242- SKU:
- 09345242
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- REPAIR KIT
- TYPE:
- WATER PUMP
$54.29Qty in Cart: 0Quantity:Price:$54.29Subtotal: -
MOOSE RACING Motor Seals - KTM 822359
MOOSE RACING
$56.35Moose can now handle all your gasket and seal needs at a fraction of OEM cost, High-tech materials provide unmatched reliability and performance, Rebuild the engine and transmission with total confidence as each set is designed for durability and...09350543- SKU:
- 09350543
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- APPLICATION:
- ENGINE
- TYPE:
- OIL
- PRODUCT NAME:
- SEAL
- UNITS:
- SET
- RIDING STYLE:
- OFF-ROAD
$56.35Qty in Cart: 0Quantity:Price:$56.35Subtotal: -
MOOSE RACING Clutch Cover - Honda D70-1425MB
MOOSE RACING
$152.95Made from machined bullet aircraft-quality aluminum for added strength, Stronger than OEM cover, Dissipates heat better than OEM cover, Hard-coated finish for long-lasting durability09401852- SKU:
- 09401852
- Availability:
- Ships Same Business Day
- Weight:
- 0.95 LBS
- PRODUCT NAME:
- COVER
- UNITS:
- EACH
- TYPE:
- CLUTCH
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- OFF-ROAD
$152.95Qty in Cart: 0Quantity:Price:$152.95Subtotal: -
MOOSE RACING Top End Gasket Kit - KLR 250 810459
MOOSE RACING
$67.73Moose can now handle all your gasket and seal needs at a fraction of OEM cost, High-tech materials provide unmatched reliability and performance, Rebuild the engine and transmission with total confidence as each set is designed for durability and...M810459- SKU:
- M810459
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$67.73 -
MOOSE RACING Top End Gasket Kit - KLX 300 810461
MOOSE RACING
$31.79Moose can now handle all your gasket and seal needs at a fraction of OEM cost, High-tech materials provide unmatched reliability and performance, Rebuild the engine and transmission with total confidence as each set is designed for durability and...M810461- SKU:
- M810461
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$31.79Qty in Cart: 0Quantity:Price:$31.79Subtotal: -
MOOSE RACING Motor Gasket Kit with Seal - KX125 811422
MOOSE RACING
$69.40Moose can now handle all your gasket and seal needs at a fraction of OEM cost, Rebuild the engine and transmission with total confidence as each set is designed for durability and accurate fit, Oil seals are genuine OEM replacement seals, Sets include...M811422- SKU:
- M811422
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
$69.40Qty in Cart: 0Quantity:Price:$69.40Subtotal: -
MOOSE RACING Motor Gasket Kit with Seal - KX125 811423
MOOSE RACING
$72.06Moose can now handle all your gasket and seal needs at a fraction of OEM cost, Rebuild the engine and transmission with total confidence as each set is designed for durability and accurate fit, Oil seals are genuine OEM replacement seals, Sets include...M811423- SKU:
- M811423
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET
$72.06Qty in Cart: 0Quantity:Price:$72.06Subtotal: -
MOOSE RACING Motor Gasket Kit with Seal - KX125 811425
MOOSE RACING
$94.75Moose can now handle all your gasket and seal needs at a fraction of OEM cost, Rebuild the engine and transmission with total confidence as each set is designed for durability and accurate fit, Oil seals are genuine OEM replacement seals, Sets include...M811425- SKU:
- M811425
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- TYPE:
- ENGINE
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
$94.75Qty in Cart: 0Quantity:Price:$94.75Subtotal: -
MOOSE RACING Motor Gasket Kit with Seal - XR650L 811281
MOOSE RACING
$128.66Moose can now handle all your gasket and seal needs at a fraction of OEM cost, Rebuild the engine and transmission with total confidence as each set is designed for durability and accurate fit, Oil seals are genuine OEM replacement seals, Sets include...M811281- SKU:
- M811281
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- TYPE:
- ENGINE
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- TYPE:
- COMPLETE
- RIDING STYLE:
- OFF-ROAD
$128.66 -
LA Sleeve Cylinder Sleeve for 2004 Honda CR125R 54mm Bore H5568
LA SLEEVE
$127.95Revitalize your engine with the LA SLEEVE Cylinder Sleeve H5568, designed to restore the performance of worn-out cylinders. Engineered from high-quality materials, this replacement sleeve ensures a perfect fit and long-lasting durability, making it an...09310059- SKU:
- 09310059
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- BORE SIZE METRIC:
- 54.00 MM
- CYLINDER BORE COATING:
- CHROME-MOLY ALLOY
- PRODUCT NAME:
- CYLINDER SLEEVE
- RIDING STYLE:
- OFF-ROAD
- COLOR/FINISH:
- CHROME
- UNITS:
- EACH
- TYPE:
- AC
$127.95Qty in Cart: 0Quantity:Price:$127.95Subtotal: -
MOOSE RACING Engine Oil Seal Kit - Honda 822315
MOOSE RACING
$56.32Includes every seal in a engine including crank shaft seals, Does not include valve stem seal, Made in the USA09351023- SKU:
- 09351023
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- SEAL KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- APPLICATION:
- ENGINE
- TYPE:
- OIL
$56.32Qty in Cart: 0Quantity:Price:$56.32Subtotal: -
LA Sleeve Cylinder Sleeve for 1997-2005 Kawasaki KDX220R 69mm Bore KA5319
LA SLEEVE
$131.95Revitalize your engine with the LA SLEEVE Cylinder Sleeve KA5319, designed for exceptional durability and performance. This high-quality replacement sleeve ensures a perfect fit and enhances the longevity of your engine, making it an ideal choice for...09310083- SKU:
- 09310083
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- CYLINDER BORE COATING:
- CHROME-MOLY ALLOY
- TYPE:
- AC
- BORE SIZE METRIC:
- 69.00 MM
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- CYLINDER SLEEVE
$131.95Qty in Cart: 0Quantity:Price:$131.95Subtotal: -
LA Sleeve Cylinder Sleeve for Honda XR-650L 1993-2023 H5160
LA SLEEVE
$131.95Revitalize your engine with the LA SLEEVE Cylinder Sleeve H5160, designed to restore the performance of worn-out cylinders. Crafted from high-quality materials, these sleeves ensure durability and a perfect fit, making them an essential component for any...09310151- SKU:
- 09310151
- Availability:
- Ships Same Business Day
- Weight:
- 2.95 LBS
- PRODUCT NAME:
- CYLINDER SLEEVE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- RS
- BORE SIZE METRIC:
- 100.00 MM
- CYLINDER BORE COATING:
- CHROME-MOLY ALLOY
- COLOR/FINISH:
- ALUMINUM
- UNITS:
- EACH
$131.95Qty in Cart: 0Quantity:Price:$131.95Subtotal: -
LA Sleeve Cylinder Rebuild Kit for 1998-2000 Kawasaki KX80 LAS-5351K
LA SLEEVE
$312.95Revitalize your Kawasaki's performance with the LA SLEEVE Sleeve and Piston Kit. This comprehensive top-end rebuild kit is engineered for optimal efficiency, featuring advanced materials that enhance ring seal, boost compression, and elevate torque and...09310384- SKU:
- 09310384
- Availability:
- Ships Same Business Day
- Weight:
- 1.90 LBS
- MATERIAL:
- CAST
- MATERIAL:
- IRON
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- CYLINDER
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
$312.95Qty in Cart: 0Quantity:Price:$312.95Subtotal: -
MOOSE RACING Oil Pump Cover - KTM/Husky T04-5102B
MOOSE RACING
$32.95CNC Machined covers made from 6061 T6 Aluminum, Black anodized finish for added looks and appeal, Aluminum cover helps dissipate added heat from engine oil, Light weight and durable design09401937- SKU:
- 09401937
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- BASE FINISH:
- ANODIZED
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- OFF-ROAD
- COLOR/FINISH:
- ANODIZED
- MATERIAL:
- 6061 T-6 ALUMINUM
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- STREET
- BASE COLOR:
- BLACK
- COLOR/FINISH:
- MACHINED
- TYPE:
- OIL PUMP
- UNITS:
- EACH
$32.95Qty in Cart: 0Quantity:Price:$32.95Subtotal: -
MOOSE RACING Oil Filter Cover - Kawasaki T14-2301GB
MOOSE RACING
$32.95CNC Machined covers made from 6061 T6 Aluminum, Black anodized finish for added looks and appeal, Aluminum cover helps dissipate added heat from engine oil, Light weight and durable design09401941- SKU:
- 09401941
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- COLOR/FINISH:
- ANODIZED
- PRODUCT NAME:
- COVER
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- BASE COLOR:
- BLACK
- BASE FINISH:
- ANODIZED
- COLOR/FINISH:
- MACHINED
- MATERIAL:
- 6061 T-6 ALUMINUM
- TYPE:
- OIL FILTER
$32.95Qty in Cart: 0Quantity:Price:$32.95Subtotal: -
MOOSE RACING Engine Oil Seal Kit - Honda 822219
MOOSE RACING
$30.23Includes every seal in a engine including crank shaft seals, Does not include valve stem seal, Made in the USA09351020- SKU:
- 09351020
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- SEAL KIT
- UNITS:
- KIT
- APPLICATION:
- ENGINE
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- TYPE:
- OIL
$30.23Qty in Cart: 0Quantity:Price:$30.23Subtotal: -
MOOSE RACING Water Pump Cover - Black - Gas Gas I04-5255B
MOOSE RACING
$79.95Provides added durability over the stock cast OEM covers. Comes with OEM type gasket and brass washer drain-plug for quick and easy installation. Can be used with all OEM radiator hoses and clamps.09401934- SKU:
- 09401934
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- PRODUCT NAME:
- COVER
- COLOR/FINISH:
- BLACK
- MATERIAL:
- BILLET ALUMINUM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- TYPE:
- WATER PUMP
$79.95Qty in Cart: 0Quantity:Price:$79.95Subtotal:
