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 Top End Gasket Kit - XR80 810208
MOOSE RACING
$40.11A top-end rebuild demands precision gaskets and seals that won't compromise your engine's integrity or cost you a fortune. The MOOSE RACING Top End Gasket Kit delivers OEM-quality components at a fraction of dealer pricing, giving you the confidence to...M810208- SKU:
- M810208
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$40.11 -
MOOSE RACING Case Saver - YZ250 04-162
MOOSE RACING
$23.95Engine case damage from impacts and debris is one of the costliest failures in off-road racing—and one of the easiest to prevent. The MOOSE RACING Case Saver replaces flimsy OEM plastic guards with precision-machined aluminum protection that actually...09500020- SKU:
- 09500020
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- RIDING STYLE:
- OFF-ROAD
- COLOR/FINISH:
- ALUMINUM
- UNITS:
- EACH
- BASE COLOR:
- SILVER
- MATERIAL:
- 6061 ALUMINUM
- PRODUCT NAME:
- CASE SAVER
- TYPE:
- ENGINE
$23.95 -
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 - 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 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 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 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 - RM125 822125
MOOSE RACING
$30.68Engine seal failure can compromise compression, cause oil leakage, and force costly rebuilds. MOOSE RACING Motor Seals deliver OEM-equivalent performance at a fraction of dealership pricing, giving you the confidence to rebuild your RM125 with...M822125- SKU:
- M822125
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- OIL
- APPLICATION:
- ENGINE
- PRODUCT NAME:
- SEAL
- UNITS:
- SET
$30.68 -
MOOSE RACING Motor Gasket Kit with Seal - XR50 811209
MOOSE RACING
$88.62A complete engine and transmission rebuild demands precision-fitted gaskets and seals that won't compromise your work or your budget. The MOOSE RACING Motor Gasket Kit delivers OEM-equivalent performance at a fraction of OEM pricing, giving you the...09340094- SKU:
- 09340094
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- RIDING STYLE:
- STREET
- TYPE:
- ENGINE
$88.62 -
MOOSE RACING Motor Gasket Kit with Seal - XR70 811210
MOOSE RACING
$90.36A complete engine and transmission rebuild demands precision gaskets and seals that fit perfectly and hold up to demanding conditions. The MOOSE RACING Motor Gasket Kit delivers OEM-quality components at a fraction of the cost, eliminating the guesswork...09340095- SKU:
- 09340095
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
$90.36 -
MOOSE RACING Motor Gasket Kit with Seal - CR85R 811211
MOOSE RACING
$82.98A complete engine and transmission rebuild demands precision-fit gaskets and seals that won't compromise your work or your budget. MOOSE Racing delivers OEM-quality components at a fraction of dealership pricing, giving you the confidence to rebuild...09340096- SKU:
- 09340096
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- TYPE:
- ENGINE
$82.98 -
MOOSE RACING Motor Gasket Kit with Seal - CRF150 811238
MOOSE RACING
$112.56A complete engine and transmission rebuild demands precision components that won't compromise durability or break your budget. This Moose Racing gasket and seal kit delivers OEM-quality sealing surfaces across your entire drivetrain, eliminating the need...09340097- SKU:
- 09340097
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET
$112.56
