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 Exhaust Gasket Kit 823160
MOOSE RACING
$21.87MOOSE RACING Exhaust Gasket Kit09345341- SKU:
- 09345341
- Availability:
- Ships Same Business Day
- Weight:
- 0.26 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- EXHAUST
$21.87 -
MOOSE RACING Ignition Cover Gasket 816347
MOOSE RACING
$14.45Moose 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, These...09346591- SKU:
- 09346591
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- TYPE:
- IGNITION COVER
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- ENGINE TYPE:
- 4-STROKE
- UNITS:
- EACH
$14.45 -
MOOSE RACING Valve Shim - 7.48 x 3.10 - 5 pack MSE5PK748310
MOOSE RACING
$9.95Complete valve shim kits make it easier to maintain your valve train, Forged from 4140 cold rolled steel, not sintered, Laser-etched size on each shim for identification, A great addition to any mechanic's tool box, Refills sold to dealers in 5-packs;...09261896- SKU:
- 09261896
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
- RIDING STYLE:
- ATV
- TYPE:
- VALVE
- VALVE SHIM THICKNESS METRIC:
- 3.10 MM
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- UTV
- RIDING STYLE:
- WATERCRAFT
- OUTSIDE DIAMETER METRIC:
- 7.48 MM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- MATERIAL:
- ROLLED
- MATERIAL:
- STEEL
- PRODUCT NAME:
- SHIM
- RIDING STYLE:
- SNOW
- UNITS:
- 5 PACK
$9.95 -
MOOSE RACING Valve Shim - 7.48 x 3.15 - 5 pack MSE5PK748315
MOOSE RACING
$9.95Complete valve shim kits make it easier to maintain your valve train, Forged from 4140 cold rolled steel, not sintered, Laser-etched size on each shim for identification, A great addition to any mechanic's tool box, Refills sold to dealers in 5-packs;...09261897- SKU:
- 09261897
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- RIDING STYLE:
- ATV
- TYPE:
- VALVE
- OUTSIDE DIAMETER METRIC:
- 7.48 MM
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- UTV
- RIDING STYLE:
- WATERCRAFT
- MATERIAL:
- ROLLED
- MATERIAL:
- STEEL
- PRODUCT NAME:
- SHIM
- RIDING STYLE:
- SNOW
- UNITS:
- 5 PACK
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- VALVE SHIM THICKNESS METRIC:
- 3.15 MM
$9.95 -
MOOSE RACING Valve Shim - 7.48 x 3.20 - 5 pack MSE5PK748320
MOOSE RACING
$9.95Complete valve shim kits make it easier to maintain your valve train, Forged from 4140 cold rolled steel, not sintered, Laser-etched size on each shim for identification, A great addition to any mechanic's tool box, Refills sold to dealers in 5-packs;...09261898- SKU:
- 09261898
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- RIDING STYLE:
- ATV
- TYPE:
- VALVE
- OUTSIDE DIAMETER METRIC:
- 7.48 MM
- PRODUCT NAME:
- SHIM
- RIDING STYLE:
- STREET
- RIDING STYLE:
- UTV
- RIDING STYLE:
- WATERCRAFT
- UNITS:
- 5 PACK
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- VALVE SHIM THICKNESS METRIC:
- 3.20 MM
- MATERIAL:
- ROLLED
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- SNOW
$9.95 -
MOOSE RACING Valve Shim - 7.48 x 3.25 - 5 pack MSE5PK748325
MOOSE RACING
$9.95Complete valve shim kits make it easier to maintain your valve train, Forged from 4140 cold rolled steel, not sintered, Laser-etched size on each shim for identification, A great addition to any mechanic's tool box, Refills sold to dealers in 5-packs;...09261899- SKU:
- 09261899
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- RIDING STYLE:
- ATV
- TYPE:
- VALVE
- OUTSIDE DIAMETER METRIC:
- 7.48 MM
- MATERIAL:
- ROLLED
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- VALVE SHIM THICKNESS METRIC:
- 3.25 MM
- PRODUCT NAME:
- SHIM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- STREET
- RIDING STYLE:
- WATERCRAFT
- UNITS:
- 5 PACK
- RIDING STYLE:
- UTV
$9.95 -
MOOSE RACING Valve Shim - 7.48 x 3.35 - 5 pack MSE5PK748335
MOOSE RACING
$9.95Complete valve shim kits make it easier to maintain your valve train, Forged from 4140 cold rolled steel, not sintered, Laser-etched size on each shim for identification, A great addition to any mechanic's tool box, Refills sold to dealers in 5-packs;...09261901- SKU:
- 09261901
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
- MATERIAL:
- ROLLED
- MATERIAL:
- STEEL
- RIDING STYLE:
- UTV
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- VALVE
- PRODUCT NAME:
- SHIM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- STREET
- UNITS:
- 5 PACK
- VALVE SHIM THICKNESS METRIC:
- 3.35 MM
- OUTSIDE DIAMETER METRIC:
- 7.48 MM
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
$9.95 -
MOOSE RACING Valve Shim - 8.90 x 1.72 - 5 pack MSE5PK890172
MOOSE RACING
$10.95Complete valve shim kits make it easier to maintain your valve train, Forged from 4140 cold rolled steel, not sintered, Laser-etched size on each shim for identification, A great addition to any mechanic's tool box, Refills sold to dealers in 5-packs;...09261905- SKU:
- 09261905
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- MATERIAL:
- ROLLED
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- ATV
- RIDING STYLE:
- STREET
- OUTSIDE DIAMETER METRIC:
- 8.90 MM
- PRODUCT NAME:
- SHIM
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- UTV
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- VALVE
- UNITS:
- 5 PACK
- VALVE SHIM THICKNESS METRIC:
- 1.72 MM
$10.95 -
MOOSE RACING Valve Shim - 8.90 x 1.80 - 5 pack MSE5PK890180
MOOSE RACING
$10.95Complete valve shim kits make it easier to maintain your valve train, Forged from 4140 cold rolled steel, not sintered, Laser-etched size on each shim for identification, A great addition to any mechanic's tool box, Refills sold to dealers in 5-packs;...09261907- SKU:
- 09261907
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- RIDING STYLE:
- ATV
- TYPE:
- VALVE
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- UTV
- RIDING STYLE:
- WATERCRAFT
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- VALVE SHIM THICKNESS METRIC:
- 1.80 MM
- MATERIAL:
- ROLLED
- MATERIAL:
- STEEL
- OUTSIDE DIAMETER METRIC:
- 8.90 MM
- PRODUCT NAME:
- SHIM
- RIDING STYLE:
- SNOW
- UNITS:
- 5 PACK
$10.95 -
MOOSE RACING Valve Shim - 8.90 x 1.88 - 5 pack MSE5PK890188
MOOSE RACING
$10.95Complete valve shim kits make it easier to maintain your valve train, Forged from 4140 cold rolled steel, not sintered, Laser-etched size on each shim for identification, A great addition to any mechanic's tool box, Refills sold to dealers in 5-packs;...09261909- SKU:
- 09261909
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- PRODUCT NAME:
- SHIM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- STREET
- RIDING STYLE:
- UTV
- RIDING STYLE:
- WATERCRAFT
- UNITS:
- 5 PACK
- OUTSIDE DIAMETER METRIC:
- 8.90 MM
- RIDING STYLE:
- ATV
- TYPE:
- VALVE
- VALVE SHIM THICKNESS METRIC:
- 1.88 MM
- MATERIAL:
- ROLLED
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
$10.95 -
MOOSE RACING Inner Clutch Gasket 816289
MOOSE RACING
$24.68Moose can now handle all your gasket and seal needs at a fraction of OEM cast, High-tech materials provide unmatched reliability and performance, Rebuild the engine and transmissions with total confidence as each set is designed for durability and...09346144- SKU:
- 09346144
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CLUTCH COVER
- PRODUCT NAME:
- GASKET
- UNITS:
- EACH
$24.68Qty in Cart: 0Quantity:Price:$24.68Subtotal: -
MOOSE RACING Ignition Cover Gasket 816290
MOOSE RACING
$16.37Made in the U.S.A.09346145- SKU:
- 09346145
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- TYPE:
- IGNITION COVER
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- GASKET
- UNITS:
- EACH
$16.37 -
MOOSE RACING Inner Clutch Gasket 816291
MOOSE RACING
$24.68Moose can now handle all your gasket and seal needs at a fraction of OEM cast, High-tech materials provide unmatched reliability and performance, Rebuild the engine and transmissions with total confidence as each set is designed for durability and...09346146- SKU:
- 09346146
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CLUTCH COVER
- UNITS:
- EACH
$24.68 -
MOOSE RACING Ignition Cover Gasket 816292
MOOSE RACING
$13.64Made in the U.S.A.09346147- SKU:
- 09346147
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- PRODUCT NAME:
- GASKET
- TYPE:
- IGNITION COVER
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
$13.64 -
MOOSE RACING Water Pump Rebuild Kit 821332
MOOSE RACING
$57.18Include 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...09345200- SKU:
- 09345200
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- REPAIR KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- WATER PUMP
$57.18 -
MOOSE RACING Water Pump Rebuild Kit 821335
MOOSE RACING
$43.80Include 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...09345201- SKU:
- 09345201
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP
- UNITS:
- KIT
- PRODUCT NAME:
- REPAIR KIT
$43.80 -
MOOSE RACING Water Pump Rebuild Kit 821336
MOOSE RACING
$40.40Include 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...09345202- SKU:
- 09345202
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- REPAIR KIT
- TYPE:
- WATER PUMP
$40.40 -
MOOSE RACING Water Pump Rebuild Kit 821337
MOOSE RACING
$56.40Include 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...09345203- SKU:
- 09345203
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- PRODUCT NAME:
- REPAIR KIT
- TYPE:
- WATER PUMP
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
$56.40 -
MOOSE RACING Water Pump Rebuild Kit 821338
MOOSE RACING
$58.35Include 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...09345204- SKU:
- 09345204
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP
- UNITS:
- KIT
- PRODUCT NAME:
- REPAIR KIT
$58.35 -
MOOSE RACING Water Pump Rebuild Kit 821339
MOOSE RACING
$42.52Include 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...09345205- SKU:
- 09345205
- Availability:
- Ships Same Business Day
- Weight:
- 0.26 LBS
- PRODUCT NAME:
- REPAIR KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- WATER PUMP
$42.52
