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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MOOSE RACING Case Saver Guard - YZ450F CSG11
MOOSE RACING
$37.95Your YZ450F's engine case is vulnerable to impact damage during aggressive riding, and a stock cover offers minimal protection while adding unnecessary bulk. The MOOSE RACING Case Saver Guard delivers serious impact resistance in a streamlined profile...09500374- SKU:
- 09500374
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- RIDING STYLE:
- OFF-ROAD
- COLOR/FINISH:
- BLACK
- COLOR/FINISH:
- RED
- PRODUCT NAME:
- GUARD
- MATERIAL:
- NYLON
- TYPE:
- CASE SAVER
- UNITS:
- EACH
$37.95Qty in Cart: 0Quantity:Price:$37.95Subtotal: -
MOOSE RACING Case Saver Guard - RMZ250 CSG13
MOOSE RACING
$37.95Engine case damage during a crash or aggressive track session can sideline your bike and drain your wallet fast. The MOOSE RACING Case Saver Guard protects your RMZ250's cases from impact without the weight penalty or bulk of stock guards, giving you...09500376- SKU:
- 09500376
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- RIDING STYLE:
- OFF-ROAD
- COLOR/FINISH:
- BLACK
- COLOR/FINISH:
- RED
- TYPE:
- CASE SAVER
- MATERIAL:
- NYLON
- PRODUCT NAME:
- GUARD
- UNITS:
- EACH
$37.95 -
MOOSE RACING Case Saver - CRF450R 0950-0517
MOOSE RACING
$27.95Engine case damage can sideline your CRF450R faster than a blown gasket. The MOOSE RACING Case Saver replaces fragile OEM plastic guards with CNC-machined 6061 aluminum, delivering superior impact protection without adding unnecessary weight or bulk...09500517- SKU:
- 09500517
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- BASE COLOR:
- SILVER
- MATERIAL:
- 6061 ALUMINUM
- UNITS:
- EACH
- PRODUCT NAME:
- CASE SAVER
- TYPE:
- ENGINE
- COLOR/FINISH:
- ALUMINUM
- RIDING STYLE:
- OFF-ROAD
$27.95Qty in Cart: 0Quantity:Price:$27.95Subtotal: -
MOOSE RACING Case Saver - CR250R 01-162
MOOSE RACING
$23.95Engine case damage is one of the costliest failures in CR250R racing, often resulting from crashes, debris, or track contact that could have been prevented. MOOSE Racing's case saver replaces the vulnerable OEM plastic guards with CNC-machined aluminum...09500016- SKU:
- 09500016
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 LBS
- BASE COLOR:
- SILVER
- MATERIAL:
- 6061 ALUMINUM
- UNITS:
- EACH
- COLOR/FINISH:
- ALUMINUM
- PRODUCT NAME:
- CASE SAVER
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
$23.95 -
MOOSE RACING Case Saver - KX125 02-161
MOOSE RACING
$23.95Engine case damage from crashes or debris can sideline your KX125 and drain your wallet fast. The MOOSE RACING Case Saver replaces flimsy OEM plastic guards with precision-engineered aluminum protection that actually withstands impact. You'll get...09500022- SKU:
- 09500022
- Availability:
- Ships Same Business Day
- Weight:
- 0.07 LBS
- BASE COLOR:
- SILVER
- MATERIAL:
- 6061 ALUMINUM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- COLOR/FINISH:
- ALUMINUM
- PRODUCT NAME:
- CASE SAVER
- TYPE:
- ENGINE
$23.95 -
MOOSE RACING Case Saver - KX250 02-162
MOOSE RACING
$23.95Engine case damage can sideline your KX250 faster than a DNF, and plastic OEM guards simply won't cut it in competitive riding or aggressive trail conditions. The MOOSE RACING Case Saver replaces that flimsy plastic protection with precision-engineered...09500023- SKU:
- 09500023
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- BASE COLOR:
- SILVER
- MATERIAL:
- 6061 ALUMINUM
- PRODUCT NAME:
- CASE SAVER
- TYPE:
- ENGINE
- COLOR/FINISH:
- ALUMINUM
$23.95 -
MOOSE RACING Case Saver - KXF/RMZ250 02-163/03-163
MOOSE RACING
$23.95Engine case damage from track debris, crashes, or aggressive riding can sideline your bike and drain your wallet fast. The MOOSE RACING Case Saver replaces flimsy OEM plastic guards with robust aluminum protection that absorbs impacts without...09500024- SKU:
- 09500024
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- MATERIAL:
- 6061 ALUMINUM
- UNITS:
- EACH
- BASE COLOR:
- SILVER
- PRODUCT NAME:
- CASE SAVER
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- COLOR/FINISH:
- ALUMINUM
$23.95 -
MOOSE RACING Clutch Guard - Cylinder - Sherco 13-9119
MOOSE RACING
$42.95Hydraulic clutch cylinders are vulnerable contact points in aggressive riding conditions, and a single chain strike or debris impact can mean expensive damage and lost track time. The MOOSE RACING Clutch Guard provides precision-engineered protection...09500920- SKU:
- 09500920
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- TYPE:
- SLAVE CYLINDER
- UNITS:
- EACH
- COLOR/FINISH:
- ANODIZED
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- OFF-ROAD
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- CASE SAVER
$42.95 -
MOOSE RACING Clutch Cover Gasket 817200
MOOSE RACING
$10.00A leaking clutch cover gasket compromises engine reliability and creates maintenance headaches. The MOOSE RACING 817200 delivers OEM-equivalent sealing performance at a fraction of OEM pricing, so you can rebuild with confidence without breaking the...M817200- SKU:
- M817200
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- TYPE:
- CLUTCH COVER
- UNITS:
- EACH
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
$10.00 -
MOOSE RACING Ignition Cover Gasket 817946
MOOSE RACING
$7.20A failing ignition cover gasket can compromise engine sealing and lead to costly oil leaks. The MOOSE RACING Ignition Cover Gasket 817946 delivers OEM-equivalent performance at a fraction of the cost, ensuring reliable sealing whether you're rebuilding...M817247- SKU:
- M817247
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- IGNITION COVER
- UNITS:
- EACH
$7.20 -
MOOSE RACING Complete Motor Gasket Kit - WR250F/YZ250F 808690
MOOSE RACING
$109.67A complete engine rebuild demands precision seals and gaskets that maintain proper compression and prevent fluid leakage under sustained load. The MOOSE RACING Complete Motor Gasket Kit eliminates the frustration of sourcing individual components...09344786- SKU:
- 09344786
- Availability:
- Ships Same Business Day
- Weight:
- 0.36 LBS
- TYPE:
- ENGINE
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
$109.67 -
MOOSE RACING Ignition Cover Gasket 816004
MOOSE RACING
$5.62A worn or leaking ignition cover gasket compromises engine sealing and can lead to oil seepage and contamination. The MOOSE RACING Ignition Cover Gasket delivers OEM-equivalent sealing performance at a fraction of OEM pricing, making it an essential...M816004- SKU:
- M816004
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- TYPE:
- IGNITION COVER
- UNITS:
- EACH
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
$5.62 -
MOOSE RACING Motor Gasket Kit with Seal - Husqvarna/KTM 811369
MOOSE RACING
$166.08A complete engine and transmission rebuild demands precision gaskets and seals that won't compromise your work or your wallet. This MOOSE RACING kit delivers OEM-quality components at a fraction of dealership pricing, letting you rebuild with confidence...09344791- SKU:
- 09344791
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- PRODUCT NAME:
- GASKET
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
$166.08 -
MOOSE RACING Motor Gasket Kit with Seal - KX85 811483
MOOSE RACING
$99.49A complete engine and transmission rebuild demands precision gaskets and seals that won't compromise your work—or your wallet. MOOSE RACING delivers OEM-quality components at a fraction of dealer pricing, letting you rebuild with confidence and save on...09344793- SKU:
- 09344793
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 LBS
- PRODUCT NAME:
- GASKET
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
$99.49 -
MOOSE RACING Motor Gasket Kit with Seal - KX100 811484
MOOSE RACING
$87.21A complete engine and transmission rebuild demands precision-fit gaskets and seals that won't compromise your work or your budget. MOOSE RACING's comprehensive gasket kit delivers OEM-quality seals at a fraction of dealership pricing, eliminating the...09344794- SKU:
- 09344794
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- TYPE:
- ENGINE
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
$87.21 -
MOOSE RACING Motor Gasket Kit with Seal - Yamaha 811690
MOOSE RACING
$151.58Engine and transmission rebuilds demand precision—one mismatched gasket or faulty seal can compromise your entire job and leave you troubleshooting preventable leaks. The MOOSE RACING Motor Gasket Kit eliminates guesswork by delivering OEM-quality seals...09344797- SKU:
- 09344797
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- GASKET
- TYPE:
- ENGINE
$151.58 -
MOOSE RACING Top End Gasket Kit - XR50R 810209
MOOSE RACING
$30.57When you're rebuilding an XR50R top end, precision gaskets and seals aren't optional—they're the foundation of a reliable engine. This Moose Racing kit delivers every gasket, O-ring, and seal you need in one package, eliminating the hassle of sourcing...09340261- SKU:
- 09340261
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- PRODUCT NAME:
- GASKET
- TYPE:
- TOP END
- UNITS:
- KIT
- RIDING STYLE:
- STREET
- RIDING STYLE:
- OFF-ROAD
$30.57 -
MOOSE RACING Ignition Cover Gasket 816522
MOOSE RACING
$8.86A leaking ignition cover gasket compromises engine sealing and invites oil seepage that degrades performance and cleanliness. The MOOSE RACING Ignition Cover Gasket delivers OEM-grade reliability at a fraction of OEM pricing, ensuring a precise fit...M816522- SKU:
- M816522
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- IGNITION COVER
- UNITS:
- EACH
$8.86 -
MOOSE RACING Top End Gasket Kit - 50SXLC 810312
MOOSE RACING
$17.46A top-end rebuild demands precision components that won't compromise reliability or performance. This MOOSE RACING gasket kit delivers OEM-quality seals and gaskets at a fraction of factory pricing, letting you rebuild with confidence. Whether you're...09340264- SKU:
- 09340264
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
$17.46 -
MOOSE RACING Motor Seals - CR125 822106
MOOSE RACING
$26.77Engine seals wear with every heat cycle, and OEM replacements can drain your budget fast. MOOSE Racing Motor Seals deliver genuine OEM-quality fitment and reliability at a fraction of dealership pricing, so you can rebuild your CR125 with confidence...M822106- SKU:
- M822106
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- ENGINE
- TYPE:
- OIL
- UNITS:
- SET
- PRODUCT NAME:
- SEAL
$26.77Qty in Cart: 0Quantity:Price:$26.77Subtotal:
