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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Pro Filter Oil Filter Cover Suzuki RM-Z250 2007-2021 BCA-4002-00
PRO FILTER
$39.99Your RM-Z250's oil circulation system is only as good as its components—a restrictive or poorly-fitted cover compromises lubrication efficiency and engine longevity. The PRO FILTER Oil Filter Cover eliminates that weak link with precision engineering and...07120637- SKU:
- 07120637
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- STREET
- TYPE:
- OIL FILTER
- UNITS:
- EACH
- COLOR/FINISH:
- BLACK ANODIZED
- MATERIAL:
- ALUMINUM
$39.99Qty in Cart: 0Quantity:Price:$39.99Subtotal: -
VESRAH Oil Filter SF-2005
VESRAH
$8.50Engine longevity depends on clean oil circulating through critical components, and particle contamination is the silent killer of performance engines. The VESRAH SF-2005 traps even the smallest contaminants before they reach your bearings and journals,...SF2005- SKU:
- SF2005
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CARTRIDGE
- FILTER MEDIA MATERIAL:
- PAPER
- RIDING STYLE:
- ATV
- PRODUCT NAME:
- OIL FILTER
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
$8.50 -
VESRAH Oil Filter SF-4005
VESRAH
$9.83Engine oil quality directly impacts engine longevity and performance—contamination from metal particles, dirt, and wear debris degrades oil viscosity and accelerates component wear. The VESRAH SF-4005 traps even the smallest contaminants, maintaining...SF4005- SKU:
- SF4005
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- PRODUCT NAME:
- OIL FILTER
- RIDING STYLE:
- UTV
- TYPE:
- SPIN-ON
- FILTER MEDIA MATERIAL:
- PAPER
$9.83 -
VESRAH Oil Filter SF-4007
VESRAH
$10.50Consistent oil filtration is non-negotiable for engine longevity and reliable performance. The VESRAH SF-4007 traps contaminants before they circulate through your engine, protecting critical components under demanding conditions. A quality oil filter is...SF4007- SKU:
- SF4007
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- PRODUCT NAME:
- OIL FILTER
- TYPE:
- SPIN-ON
- FILTER MEDIA MATERIAL:
- PAPER
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- ATV
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- UTV
$10.50 -
VESRAH Oil Filter SF-2008
VESRAH
$7.17Engine longevity depends on clean oil circulating through your engine, and the VESRAH SF-2008 delivers the filtration precision you need to protect your investment. This filter traps even the smallest contaminants that can cause wear and reduce...07120024- SKU:
- 07120024
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- FILTER MEDIA MATERIAL:
- PAPER
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- TYPE:
- CARTRIDGE
- PRODUCT NAME:
- OIL FILTER
- RIDING STYLE:
- OFF-ROAD
$7.17 -
WINDEROSA Crankshaft Oil Seal Set 622101
WINDEROSA
$22.67Oil seal degradation is one of the most common causes of engine oil leakage in high-performance watercraft, often going unnoticed until catastrophic failure occurs. The WINDEROSA Crankshaft Oil Seal Set 622101 replaces both the magneto-side and PTO-side...PD810775- SKU:
- PD810775
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- PRODUCT NAME:
- SEAL
- TYPE:
- OIL
- APPLICATION:
- CRANKSHAFT
- MATERIAL:
- STAINLESS STEEL
- RIDING STYLE:
- WATERCRAFT
- UNITS:
- SET
$22.67 -
WINDEROSA Crankshaft Oil Seal Set 622104
WINDEROSA
$22.67Oil seal degradation is one of the most common causes of catastrophic engine failure in high-performance watercraft—and it's entirely preventable. The WINDEROSA Crankshaft Oil Seal Set 622104 provides OEM-equivalent sealing on both the magneto and PTO...PD810788- SKU:
- PD810788
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- SEAL
- UNITS:
- SET
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- OIL
- APPLICATION:
- CRANKSHAFT
$22.67 -
WINDEROSA Crankshaft Oil Seal Set 622116
WINDEROSA
$23.13Oil seal degradation is a silent killer of marine engines—once they fail, coolant and fuel contamination follows, leading to catastrophic bearing damage and costly repairs. The WINDEROSA Crankshaft Oil Seal Set 622116 replaces both the magneto-side and...PD810795- SKU:
- PD810795
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- APPLICATION:
- CRANKSHAFT
- MATERIAL:
- STAINLESS STEEL
- TYPE:
- OIL
- UNITS:
- SET
- PRODUCT NAME:
- SEAL
- RIDING STYLE:
- WATERCRAFT
$23.13 -
WINDEROSA Crankshaft Oil Seal Set 622802
WINDEROSA
$19.17Oil seal degradation is one of the most common causes of catastrophic engine failure in watercraft—yet it's entirely preventable with proper maintenance. The WINDEROSA Crankshaft Oil Seal Set 622802 provides complete seal coverage for both magneto and...PD810796- SKU:
- PD810796
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- RIDING STYLE:
- UTV
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- WATERCRAFT
- APPLICATION:
- CRANKCASE
- TYPE:
- OIL
- MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- SEAL
- UNITS:
- SET
$19.17Qty in Cart: 0Quantity:Price:$19.17Subtotal: -
WINDEROSA Crankshaft Oil Seal Set 622202
WINDEROSA
$25.33Engine oil seals are critical wear items that prevent fluid leakage and contamination at the crankshaft's most vulnerable points. If your watercraft is experiencing seepage around the magneto or PTO side, a degraded seal set will only worsen, leading to...PD810797- SKU:
- PD810797
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- APPLICATION:
- CRANKCASE
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- OIL
- UNITS:
- SET
- MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- SEAL
$25.33 -
WORKS CONNECTION Oil Filter Cover - Red 27-006
WORKS CONNECTION
$76.95An oil filter cover serves as both a functional engine component and a visual statement on your build. This Works Connection piece combines precision engineering with bold aesthetics, protecting your oil filter while adding a refined detail that...09500881- SKU:
- 09500881
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- MATERIAL:
- 6061 ALUMINUM
- UNITS:
- EACH
- BASE COLOR:
- RED
- TYPE:
- OIL FILTER
- COLOR/FINISH:
- RED
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- OFF-ROAD
$76.95 -
WORKS CONNECTION Oil Fill Plug - Blue 24-030
WORKS CONNECTION
$32.95Stock plastic oil fill plugs are prone to cracking under high heat and vibration, risking oil leaks and engine damage. The WORKS CONNECTION Oil Fill Plug replaces that weak point with a CNC-machined aluminum component that withstands extreme track...09500609- SKU:
- 09500609
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- STREET
- BASE COLOR:
- BLUE
- BASE FINISH:
- ANODIZED
- MATERIAL:
- 6061 T-6 ALUMINUM
- TYPE:
- OIL FILLER
- COLOR/FINISH:
- BLUE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- PRODUCT NAME:
- PLUG
$32.95 -
WORKS CONNECTION Oil Fill Plug - Black 24-021
WORKS CONNECTION
$32.95Your stock plastic oil fill plug is a weak point in an otherwise precision engine bay. The WORKS CONNECTION Oil Fill Plug replaces that fragile component with a CNC-machined aluminum alternative that won't crack, strip, or fail under high heat and...09500610- SKU:
- 09500610
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- BASE FINISH:
- ANODIZED
- COLOR/FINISH:
- BLACK
- MATERIAL:
- 6061 T-6 ALUMINUM
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- OIL FILLER
- PRODUCT NAME:
- PLUG
- RIDING STYLE:
- STREET
- BASE COLOR:
- BLACK
- UNITS:
- EACH
$32.95 -
WORKS CONNECTION Oil Filler Plug - Red 24-077
WORKS CONNECTION
$32.95Stock plastic oil filler plugs crack under thermal stress and vibration, compromising engine seal integrity during high-performance driving. This CNC-machined aluminum replacement eliminates that weakness with a durable, precision-engineered design that...09500965- SKU:
- 09500965
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- BASE FINISH:
- ANODIZED
- PRODUCT NAME:
- PLUG
- RIDING STYLE:
- OFF-ROAD
- COLOR/FINISH:
- RED
- UNITS:
- EACH
- BASE COLOR:
- RED
- MATERIAL:
- 6061 T-6 ALUMINUM
- TYPE:
- OIL FILLER
$32.95Qty in Cart: 0Quantity:Price:$32.95Subtotal: -
VESRAH Complete Gasket Kit - YZ100 VG-2010
VESRAH
$30.81A complete engine rebuild demands precision sealing at every junction, and substandard gaskets compromise compression, leak oil, and fail prematurely. The VESRAH Complete Gasket Kit VG-2010 supplies every seal your YZ100 engine needs for a fresh,...VG2010- SKU:
- VG2010
- Availability:
- Ships Same Business Day
- Weight:
- 0.26 LBS
- PRODUCT NAME:
- GASKET
- UNITS:
- SET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
$30.81 -
WINDEROSA Complete Gasket Kit - Yamaha 1100 611604
WINDEROSA
$190.78Engine gasket failure is one of the fastest paths to catastrophic engine damage—and the last thing you need mid-season is oil leaking past a degraded seal or coolant seeping through a failed head gasket. The WINDEROSA Complete Gasket Kit for Yamaha 1100...PD811540- SKU:
- PD811540
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- PRODUCT NAME:
- GASKET SET
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- COMPLETE
- UNITS:
- SET
$190.78 -
MATRIX CONCEPTS,LLC Oil Drain Pan M28 100
MATRIX CONCEPTS,LLC
$26.95Oil changes are a fundamental maintenance task, but spills and mess are an unnecessary hassle. The MATRIX CONCEPTS M28100 Oil Drain Pan eliminates guesswork with its integrated containment design and secure screw-on cap, letting you drain, store, and...07120360- SKU:
- 07120360
- Availability:
- Ships Same Business Day
- Weight:
- 1.05 LBS
- MATERIAL:
- PLASTIC
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- UNITS:
- EACH
- LENGTH METRIC:
- 25.4 CM
- RIDING STYLE:
- SNOW
- WIDTH METRIC:
- 38.1 CM
- COLOR/FINISH:
- WHITE
- FEATURES:
- 6 QUARTS
- PRODUCT NAME:
- PAN
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- STREET
- RIDING STYLE:
- UTV
- TYPE:
- OIL DRAIN
$26.95 -
MATRIX CONCEPTS,LLC Oil Drain Pan - 15 Quart M28-115
MATRIX CONCEPTS,LLC
$29.95Oil changes are a non-negotiable part of vehicle maintenance, but traditional drain pans often create a mess that wastes time and damages shop floors. The MATRIX CONCEPTS M28-115 eliminates that frustration with a sealed, integrated design that captures...07120644- SKU:
- 07120644
- Availability:
- Ships Same Business Day
- Weight:
- 2.21 LBS
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- LENGTH METRIC:
- 53 CM
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- UTV
- WIDTH METRIC:
- 38.1 CM
- COLOR/FINISH:
- WHITE
- FEATURES:
- 15 QUARTS
- PRODUCT NAME:
- PAN
- RIDING STYLE:
- OFF-ROAD
- MATERIAL:
- PLASTIC
- RIDING STYLE:
- STREET
- TYPE:
- OIL DRAIN
$29.95 -
On Sale
Wiseco Piston Kit Standard 47.50mm for Honda CR85R 2003-2007 838M04750
WISECO
MSRP: $134.95Now: $115.00Was: $134.95A worn or damaged piston directly compromises combustion efficiency and engine reliability—replacing it with a quality Wiseco unit restores your CR85R to factory performance standards. This standard-size piston eliminates the need for boring, keeping...09100323- SKU:
- 09100323
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- BORE - OVERSIZE METRIC:
- STANDARD
- PISTON MATERIAL:
- FORGED
- BORE - OVERSIZE:
- STANDARD
- PRODUCT NAME:
- PISTON KIT
- STROKE LENGTH METRIC:
- 47.80 MM
- UNITS:
- EACH
- BORE SIZE METRIC:
- 47.50 MM
- DISPLACEMENT:
- 84,7 CC
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- GP STYLE
- PISTON MATERIAL:
- ALUMINUM
- RIDING STYLE:
- OFF-ROAD
MSRP: $134.95Now: $115.00Was: $134.95Qty in Cart: 0Quantity:Price:MSRP: $134.95Now: $115.00Was: $134.95Subtotal: -
On Sale
WISECO Piston Kit - +2.00 mm - XR100/R/CRF100F 4666M05500
WISECO
MSRP: $169.95Now: $144.00Was: $169.95If your XR100/R or CRF100F is showing signs of wear or you're looking to restore original performance, a quality piston kit is essential to engine reliability and longevity. Wiseco pistons are engineered to OEM specifications with tight tolerances,...09100331- SKU:
- 09100331
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- BORE - OVERSIZE METRIC:
- +2.00 MM
- COMPRESSION RATIO IMPERIAL:
- 9.4:1
- RIDING STYLE:
- OFF-ROAD
- DISPLACEMENT:
- 107,00 CC
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- STROKE LENGTH METRIC:
- 45.00 MM
- UNITS:
- EACH
- BORE - OVERSIZE:
- +2,00 MM
- BORE SIZE METRIC:
- 55.00 MM
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
MSRP: $169.95Now: $144.00Was: $169.95Qty in Cart: 0Quantity:Price:MSRP: $169.95Now: $144.00Was: $169.95Subtotal:
