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
-
Wossner Kawasaki KX125 2000-2002 Piston Kit 8062DA
WOSSNER
$122.00Experience unparalleled performance with the WOSSNER Piston Kit 8062DA, designed specifically for 2-stroke engines. Crafted from premium materials and engineered for precision, this piston kit enhances efficiency and reduces friction, ensuring a quieter...09105498- SKU:
- 09105498
- Availability:
- Ships Same Business Day
- Weight:
- 0.41 LBS
- MODEL:
- STANDARD SERIES
- PISTON SIZE METRIC:
- 53.95 MM
- PRODUCT NAME:
- PISTON KIT
- BORE - OVERSIZE METRIC:
- STANDARD
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- BORE SIZE METRIC:
- 54.00 MM
- TYPE:
- SINGLE RING
- BORE - OVERSIZE:
- STANDARD
- DISPLACEMENT:
- 124 CC
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$122.00Qty in Cart: 0Quantity:Price:$122.00Subtotal: -
Wossner Kawasaki KX125 2000-2002 Piston Kit 8062DB
WOSSNER
$122.00Experience unparalleled performance with the WOSSNER Piston Kit 8062DB, meticulously engineered for 2-stroke engines. Crafted from premium 4032 T6 forged aluminum alloy, this piston kit enhances your engine's efficiency while minimizing friction for a...09105499- SKU:
- 09105499
- Availability:
- Ships Same Business Day
- Weight:
- 0.41 LBS
- BORE - OVERSIZE METRIC:
- +0.01 MM
- MODEL:
- STANDARD SERIES
- PISTON SIZE METRIC:
- 53.96 MM
- PRODUCT NAME:
- PISTON KIT
- BORE SIZE METRIC:
- 54.01 MM
- TYPE:
- SINGLE RING
- BORE - OVERSIZE:
- +0,01 MM
- PISTON MATERIAL:
- FORGED
- UNITS:
- KIT
- DISPLACEMENT:
- 124 CC
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
$122.00Qty in Cart: 0Quantity:Price:$122.00Subtotal: -
On Sale
Wossner Piston Kit Kawasaki KX125 2001-2002 8062DC
WOSSNER
MSRP: $117.95Now: $78.00Was: $117.95Experience unparalleled performance with the WOSSNER Piston Kit 8062DC, expertly engineered for 2-stroke engines. This premium piston kit is designed to enhance efficiency and reduce friction, ensuring a smoother and quieter ride. Crafted from...09105500- SKU:
- 09105500
- Availability:
- Ships Same Business Day
- Weight:
- 0.41 LBS
- BORE - OVERSIZE:
- +0,02 MM
- MODEL:
- STANDARD SERIES
- PRODUCT NAME:
- PISTON KIT
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PISTON SIZE METRIC:
- 53.97 MM
- BORE - OVERSIZE METRIC:
- +0.02 MM
- BORE SIZE METRIC:
- 54.02 MM
- DISPLACEMENT:
- 124 CC
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- SINGLE RING
- UNITS:
- KIT
MSRP: $117.95Now: $78.00Was: $117.95Qty in Cart: 0Quantity:Price:MSRP: $117.95Now: $78.00Was: $117.95Subtotal: -
MOOSE RACING Water Pump Seal - Honda 503001
MOOSE RACING
$31.85High-quality mechanical water pump seals now available separately, Enhances existing complete gasket kits09350853- SKU:
- 09350853
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- PRODUCT NAME:
- SEAL KIT
- UNITS:
- KIT
- APPLICATION:
- WATER PUMP
- RIDING STYLE:
- ATV
$31.85 -
MILLENNIUM Piston Kit K8930D500-2
MILLENNIUM
$449.954-stroke pistons are made using a double-bridged forging design, Lightweight pistons with the tightest piston-wall clearances in the industry give you a quieter running engine09105034- SKU:
- 09105034
- Availability:
- Ships Same Business Day
- Weight:
- 2.50 LBS
- BORE SIZE METRIC:
- 98 MM
- PRODUCT NAME:
- PISTON KIT
- RING MATERIAL:
- NITRIDE COATED
- SKIRT COATING:
- MOLY COATED
- STYLE:
- BIG BORE
- BORE - OVERSIZE:
- +5,00 MM
- BORE - OVERSIZE METRIC:
- +5.00 MM
- PISTON MATERIAL:
- STEEL
- RIDING STYLE:
- UTV
- COMPRESSION RATIO IMPERIAL:
- 12.0:1
- UNITS:
- KIT
$449.95 -
MOOSE RACING Top End Gasket Kit - KX 500 810470
MOOSE RACING
$43.80Moose 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...M810470- SKU:
- M810470
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- KIT
$43.80 -
MOOSE RACING Top End Gasket Kit - KX 500 810474
MOOSE RACING
$40.87Moose 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...M810474- SKU:
- M810474
- Availability:
- Ships Same Business Day
- Weight:
- 0.14 LBS
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$40.87 -
MOOSE RACING Top End Gasket Kit - RM 125 810544
MOOSE RACING
$24.85Moose 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...M810544- SKU:
- M810544
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- TOP END
$24.85 -
MOOSE RACING Top End Gasket Kit - RM 125 810545
MOOSE RACING
$24.85Moose 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...M810545- SKU:
- M810545
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- UNITS:
- KIT
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
$24.85Qty in Cart: 0Quantity:Price:$24.85Subtotal: -
MOOSE RACING Top End Gasket Kit - RM 125 810546
MOOSE RACING
$27.72Moose 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...M810546- SKU:
- M810546
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- TOP END
$27.72 -
MOOSE RACING Top End Gasket Kit - TRX 250 810841
MOOSE RACING
$48.17Moose 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...M810841- SKU:
- M810841
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- GASKET
- TYPE:
- TOP END
- UNITS:
- KIT
- RIDING STYLE:
- ATV
$48.17 -
MOOSE RACING Top End Gasket Kit - KVF 360 810845
MOOSE RACING
$48.17Moose 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...M810845- SKU:
- M810845
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- GASKET
- TYPE:
- TOP END
- RIDING STYLE:
- ATV
- UNITS:
- KIT
$48.17 -
MOOSE RACING Top End Gasket Kit - Arctic Cat/Suzuki 810846
MOOSE RACING
$61.69Moose 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...M810846- SKU:
- M810846
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- ATV
- UNITS:
- KIT
$61.69 -
MOOSE RACING Top End Gasket Kit - DVX/LTZ/KFX 810847
MOOSE RACING
$60.52Moose 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...M810847- SKU:
- M810847
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- TYPE:
- TOP END
- RIDING STYLE:
- ATV
$60.52 -
MOOSE RACING Water Pump Seal - Kawasaki/Yamaha 503000
MOOSE RACING
$26.53A worn water pump seal is a silent threat to engine reliability—it allows coolant to weep past the impeller, compromising cooling system integrity and risking catastrophic overheating. The MOOSE RACING Water Pump Seal (503000mse) delivers OEM-grade...09350852- SKU:
- 09350852
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- APPLICATION:
- WATER PUMP
- PRODUCT NAME:
- SEAL KIT
- UNITS:
- KIT
- RIDING STYLE:
- ATV
$26.53 -
MOOSE RACING Water Pump Seal - Arctic Cat 503002
MOOSE RACING
$26.53Water pump seal failure is one of the most common causes of coolant leaks in Arctic Cat engines, often leading to overheating and catastrophic engine damage if left unaddressed. This MOOSE Racing mechanical seal is engineered to OEM specifications,...09350854- SKU:
- 09350854
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- RIDING STYLE:
- ATV
- UNITS:
- KIT
- APPLICATION:
- WATER PUMP
- PRODUCT NAME:
- SEAL KIT
$26.53 -
MOOSE RACING Water Pump Seal - Polaris/Honda 503003
MOOSE RACING
$26.53Water pump seal failure is one of the most common causes of mid-season breakdowns in Polaris and Honda powersports applications. A worn or degraded seal allows coolant to leak past the pump shaft, leading to overheating, potential engine damage, and...09350855- SKU:
- 09350855
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- APPLICATION:
- WATER PUMP
- PRODUCT NAME:
- SEAL KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- RIDING STYLE:
- UTV
$26.53 -
MOOSE RACING Water Pump Seal - Polaris 503004
MOOSE RACING
$37.21High-quality mechanical water pump seals now available separately, Enhances existing complete gasket kits09350856- SKU:
- 09350856
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- RIDING STYLE:
- ATV
- PRODUCT NAME:
- SEAL KIT
- UNITS:
- KIT
- APPLICATION:
- WATER PUMP
$37.21 -
MOOSE RACING Water Pump Seal - Can-Am 503005M
MOOSE RACING
$27.08High-quality mechanical water pump seals now available separately, Enhances existing complete gasket kits09350857- SKU:
- 09350857
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- APPLICATION:
- WATER PUMP
- UNITS:
- KIT
- PRODUCT NAME:
- SEAL KIT
- RIDING STYLE:
- UTV
$27.08 -
MOOSE RACING Ignition Cover Gasket 816658
MOOSE RACING
$6.38Made in the U.S.A.09346158- SKU:
- 09346158
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- PRODUCT NAME:
- GASKET
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- IGNITION COVER
$6.38Qty in Cart: 0Quantity:Price:$6.38Subtotal:
