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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XCELDYNE Valve Spring Bucket XBT22202
XCELDYNE
$140.49Built using the same technology as the CV4 Formula 1 buckets, Made with proprietary steel for the lightest and strongest part possible, Diamond-like-Carbon (DLC) coating substantially reduces friction and decreases valvetrain wear, Increase rpm and...09260625- SKU:
- 09260625
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
- PRODUCT NAME:
- SPRING BUCKET
- UNITS:
- EACH
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- EXHAUST
$140.49 -
MOOSE RACING Clutch Cover Gasket 816021
MOOSE RACING
$12.06Moose 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...M816021- SKU:
- M816021
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- TYPE:
- CLUTCH COVER
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
$12.06 -
MOOSE RACING Oil Filter - Yamaha DT-09-80
MOOSE RACING
$5.95High-quality replacement for your standard filter, Can filter down to 10 microns, Constructed with high-quality paper filter materials, Manufactured with sealing ring to ensure perfect fit, Offers maximum protection and long-lasting filter life, May be...07120229- SKU:
- 07120229
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- MICRON RATING:
- 10 MICRONS
- PRODUCT NAME:
- OIL FILTER
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- STYLE:
- STANDARD
- TYPE:
- CARTRIDGE
- FILTER MEDIA MATERIAL:
- PAPER
- RIDING STYLE:
- ATV
$5.95 -
Twin Air Oil Filter Yamaha WR400F 1998-2000 WR426F 2001-2002 YZ250F 2001-2002 YZ400F 1998-1999 YZ426F 2000-2002 140008
TWIN AIR
$13.95Twin Air Oil Filter 140008 for Yamaha Motorcycles Experience unparalleled engine protection and performance with the Twin Air Oil Filter 140008, specifically designed for Yamaha motorcycles. This premium oil filter ensures your engine runs smoothly and...140008- SKU:
- 140008
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- OIL FILTER
- STYLE:
- STANDARD
- FILTER MEDIA MATERIAL:
- PAPER
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CARTRIDGE
$13.95 -
Twin Air Oil Filter for KTM 1987-2023 Models 140013
TWIN AIR
$11.95Optimize Your KTM's Performance with the Twin Air Oil Filter Unlock the full potential of your KTM motorcycle with the Twin Air Oil Filter, meticulously designed for models spanning from 1987 to 2023. This premium filter guarantees superior oil flow and...140013- SKU:
- 140013
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- FILTER MEDIA MATERIAL:
- PAPER
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- PRODUCT NAME:
- OIL FILTER
- STYLE:
- FIRST FILTER FOR DUAL FILTER APPLICATIONS
- TYPE:
- CARTRIDGE
$11.95 -
On Sale
Pro Circuit Stainless Steel Power Valve for Kawasaki KX85 2002-2013 PVK01085
PRO CIRCUIT
MSRP: $229.95Now: $202.36Was: $229.95Unlock the full potential of your engine with the PRO CIRCUIT Power Valve PVK01085. Designed to optimize exhaust flow, this high-performance valve enhances bottom-end torque while maintaining peak horsepower. Crafted from durable billet stainless steel,...09310477- SKU:
- 09310477
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
- MATERIAL:
- STAINLESS STEEL
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- PRODUCT NAME:
- POWER VALVE
MSRP: $229.95Now: $202.36Was: $229.95 -
HOT RODS Crankshaft - OEM Stroke - Can-Am HR00063
HOT RODS
$251.95Crankshaft - OEM Stroke - Can-Am Factory trued and balanced, OEM crankshaft replacement, Crankshaft only, connecting rods sold separately09210885- SKU:
- 09210885
- Availability:
- Ships Same Business Day
- Weight:
- 13.35 LBS
$251.95Qty in Cart: 0Quantity:Price:$251.95Subtotal: -
HOT RODS Bottom End Kit - OE Crankshaft Replacement - Polaris HR00119
HOT RODS
$1,473.95Bottom End Kit - OE Crankshaft Replacement - Polaris Kit features everything needed to complete crankshaft installation including Hot Rods main bearings and seals kit plus a complete engine gasket set that includes all gaskets and seals for a complete...09210898- SKU:
- 09210898
- Availability:
- Ships Same Business Day
- Weight:
- 24.35 LBS
$1,473.95 -
MOOSE OFFROAD Oil Filter - Kawasaki/Suzuki DT-09-41
MOOSE OFFROAD
$5.95Oil Filter - Kawasaki/Suzuki High-quality replacement for your standard filter, Can filter down to 10 microns, Constructed with high-quality paper filter materials, Manufactured with sealing ring to ensure perfect fit, Offers maximum protection and...07120223- SKU:
- 07120223
- Availability:
- Ships Same Business Day
- Weight:
- 0.12 LBS
$5.95Qty in Cart: 0Quantity:Price:$5.95Subtotal: -
MOOSE OFFROAD Motor Gasket Kit with Oil Seal - Honda 811261MSE
MOOSE OFFROAD
$104.86Motor Gasket Kit with Oil Seal - 811261MSE Complete gasket and seal set designed for Honda engines Durable construction ensures longevity and reliability OEM replacement oil seals for optimal performance Includes all necessary gaskets...M811261- SKU:
- M811261
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
$104.86Qty in Cart: 0Quantity:Price:$104.86Subtotal: -
MOOSE OFFROAD Oil Seal Set - Suzuki 822309MSE
MOOSE OFFROAD
$22.08Oil Seal Set - 822309MSE Comprehensive set for complete engine and transmission rebuild Includes all essential gaskets and oil seals Features formed rubber valve cover gaskets for a perfect fit Valve seals included for enhanced...09351185- SKU:
- 09351185
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
$22.08 -
MOOSE OFFROAD Top End Gasket Set 8100033MSE
MOOSE OFFROAD
$50.24Top End Gasket Set Set includes all gaskets and O-rings necessary to rebuild the entire engine and transmission; valve seals also included, Complete sets include formed valve cover gasket and oil seals, Non-complete sets do not include formed valve cover...09346890- SKU:
- 09346890
- Availability:
- Ships Same Business Day
- Weight:
- 0.07 LBS
$50.24Qty in Cart: 0Quantity:Price:$50.24Subtotal: -
MOOSE OFFROAD Top End Gasket Set - Honda 8100029MSE
MOOSE OFFROAD
$27.22Top End Gasket Set - Honda Set includes all gaskets and O-rings necessary to rebuild the entire engine and transmission; valve seals also included, Complete sets include formed valve cover gasket and oil seals, Non-complete sets do not include formed...09346914- SKU:
- 09346914
- Availability:
- Ships Same Business Day
- Weight:
- 0.17 LBS
$27.22Qty in Cart: 0Quantity:Price:$27.22Subtotal: -
On Sale
MOOSE OFFROAD Gasket Set with Seals - Suzuki 8110045MSE
MOOSE OFFROAD
MSRP: $77.00Now: $50.00Was: $77.00Gasket Set with Seals - Suzuki Set includes all gaskets and O-rings necessary to rebuild the entire engine and transmission; valve seals also included, Complete sets include formed valve cover gasket and oil seals, Non-complete sets do not include formed...09346975- SKU:
- 09346975
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 LBS
MSRP: $77.00Now: $50.00Was: $77.00Qty in Cart: 0Quantity:Price:MSRP: $77.00Now: $50.00Was: $77.00Subtotal: -
MOOSE OFFROAD Ignition Cover Gasket - Suzuki 816817MSE
MOOSE OFFROAD
$12.69Ignition Cover Gasket - Suzuki These individually sold gaskets are great when replacing a clutch or to seal a leaky ignition cover, Made in the USA09346976- SKU:
- 09346976
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
$12.69Qty in Cart: 0Quantity:Price:$12.69Subtotal: -
PROX Top End Gasket Set - Kawasaki 35.4429
PROX
$59.95Top End Gasket Set - Kawasaki Offer any gasket you need for a top-end rebuild, Precision engineering and the use of first-class materials guarantee the quality you demand09347140- SKU:
- 09347140
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
$59.95Qty in Cart: 0Quantity:Price:$59.95Subtotal: -
PROX Top End Gasket Set - Sherco 35.7334
PROX
$54.95Top End Gasket Set - Sherco Offer any gasket you need for a top-end rebuild, Precision engineering and the use of first-class materials guarantee the quality you demand09347152- SKU:
- 09347152
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
$54.95Qty in Cart: 0Quantity:Price:$54.95Subtotal: -
PROX Gasket Kit - Complete - Yamaha 34.2221
PROX
$74.95Gasket Kit - Complete - Yamaha Includes all necessary top-quality gaskets, rubber parts and valve stem seals to rebuild top-end and complete engines, respectively09345547- SKU:
- 09345547
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
$74.95Qty in Cart: 0Quantity:Price:$74.95Subtotal: -
VERTEX Piston Kit - 76.95 mm - Kawasaki KX250F 24165A
VERTEX
$124.95Piston Kit - 76.95 mm - Kawasaki KX250F The piston is heat-treated with aT-5 hardening and tempering cycle, The piston skirt is treated with a Molybdenum Disulphite coating for a faster break-in time and increased piston life, Forged replica piston is a...09104669- SKU:
- 09104669
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
$124.95Qty in Cart: 0Quantity:Price:$124.95Subtotal: -
Wiseco Wrist Pin for Honda CRF125F 2014-2021 S538
WISECO
$22.99Experience unparalleled strength and reliability with Wiseco's advanced wrist pin technology. Designed to withstand extreme conditions, these wrist pins minimize thermal expansion, ensuring optimal performance in high-temperature environments. Elevate...S538- SKU:
- S538
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
$22.99Qty in Cart: 0Quantity:Price:$22.99Subtotal:
