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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ACERBIS X-Power Cover Kit - White - KTM/Husqvarna 2726840002
ACERBIS
$67.95Engine crankcase and Ignition/clutch cover, Protects against dirt, debris and impact, Installs easily with stock crankcase and Ignition/clutch cover bolts, Molded openings for easy access to oil cap and filter cover, Heat resistant; won't interfere with...09401768- SKU:
- 09401768
- Availability:
- Ships Same Business Day
- Weight:
- 1.46 LBS
- MATERIAL:
- PLASTIC
- PRODUCT NAME:
- COVER
- TYPE:
- ENGINE
- COLOR/FINISH:
- WHITE
- MODEL:
- X-POWER
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$67.95 -
ACERBIS X-Power Cover Kit - Black - KTM/Husqvarna 2732130001
ACERBIS
$69.95Engine crankcase and Ignition/clutch cover, Protects against dirt, debris and impact, Installs easily with stock crankcase and Ignition/clutch cover bolts, Molded openings for easy access to oil cap and filter cover, Heat resistant; won't interfere with...09401769- SKU:
- 09401769
- Availability:
- Ships Same Business Day
- Weight:
- 1.46 LBS
- TYPE:
- ENGINE
- COLOR/FINISH:
- BLACK
- MATERIAL:
- PLASTIC
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- OFF-ROAD
- MODEL:
- X-POWER
- UNITS:
- KIT
$69.95 -
ACERBIS X-Power Cover Kit - Orange - KTM/Husqvarna 2732135226
ACERBIS
$67.95Engine crankcase and Ignition/clutch cover, Protects against dirt, debris and impact, Installs easily with stock crankcase and Ignition/clutch cover bolts, Molded openings for easy access to oil cap and filter cover, Heat resistant; won't interfere with...09401770- SKU:
- 09401770
- Availability:
- Ships Same Business Day
- Weight:
- 1.46 LBS
- PRODUCT NAME:
- COVER
- COLOR/FINISH:
- ORANGE
- MODEL:
- X-POWER
- TYPE:
- ENGINE
- MATERIAL:
- PLASTIC
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$67.95Qty in Cart: 0Quantity:Price:$67.95Subtotal: -
ACERBIS X-Power Cover Kit - White - KTM/Husqvarna 2732130002
ACERBIS
$63.95Engine crankcase and Ignition/clutch cover, Protects against dirt, debris and impact, Installs easily with stock crankcase and Ignition/clutch cover bolts, Molded openings for easy access to oil cap and filter cover, Heat resistant; won't interfere with...09401771- SKU:
- 09401771
- Availability:
- Ships Same Business Day
- Weight:
- 1.46 LBS
- PRODUCT NAME:
- COVER
- MATERIAL:
- PLASTIC
- COLOR/FINISH:
- WHITE
- MODEL:
- X-POWER
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$63.95 -
ACERBIS X-Power Cover Kit - Black - Honda 2856840001
ACERBIS
$76.95Engine crankcase and Ignition/clutch cover, Protects against dirt, debris and impact, Installs easily with stock crankcase and Ignition/clutch cover bolts, Molded openings for easy access to oil cap and filter cover, Heat resistant; won't interfere with...09401994- SKU:
- 09401994
- Availability:
- Ships Same Business Day
- Weight:
- 1.35 LBS
- MATERIAL:
- PLASTIC
- TYPE:
- ENGINE
- MODEL:
- X-POWER
- PRODUCT NAME:
- COVER
- UNITS:
- KIT
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- OFF-ROAD
$76.95 -
ACERBIS X-Power Cover Kit - Black - Gas Gas 2872870001
ACERBIS
$76.95Engine crankcase and Ignition/clutch cover, Protects against dirt, debris and impact, Installs easily with stock crankcase and Ignition/clutch cover bolts, Molded openings for easy access to oil cap and filter cover, Heat resistant; won't interfere with...09401996- SKU:
- 09401996
- Availability:
- Ships Same Business Day
- Weight:
- 1.41 LBS
- COLOR/FINISH:
- BLACK
- UNITS:
- KIT
- MODEL:
- X-POWER
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- STREET
- TYPE:
- ENGINE
- MATERIAL:
- PLASTIC
$76.95 -
K & N Oil Filter KN-650
K & N
$11.99K&N delivers a premium oil filter which is built with a synthetic media specifically designed to withstand the high concentrates of synthetic racing oils, A large filter media provides high-flow rates and outstanding oil filtration to keep your motor...07120554- SKU:
- 07120554
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- BASE COLOR:
- YELLOW
- BASE FINISH:
- NATURAL
- STYLE:
- STANDARD
- UNITS:
- EACH
- LENGTH METRIC:
- 128 MM
- PRODUCT NAME:
- OIL FILTER
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- YELLOW
- FILTER MEDIA MATERIAL:
- SYNTHETIC
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- TYPE:
- CARTRIDGE
$11.99 -
On Sale
Wiseco YZ125 1976-1993 Piston Ring Set 56.5mm 2224CS
WISECO
MSRP: $24.95Now: $21.00Was: $24.95The WISECO Ring Set 2224CS is engineered for optimal performance and durability, specifically designed for a single piston application. This high-quality ring set ensures a perfect seal and enhances engine efficiency, making it an essential component for...2224CS- SKU:
- 2224CS
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- UNITS:
- SET
- BORE SIZE METRIC:
- 56.50 MM
- DISPLACEMENT:
- 123 CC
- PISTON MATERIAL:
- ALUMINUM
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- PISTON RING
- DISPLACEMENT:
- 124 CC
MSRP: $24.95Now: $21.00Was: $24.95Qty in Cart: 0Quantity:Price:MSRP: $24.95Now: $21.00Was: $24.95Subtotal: -
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: -
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
