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 Intake Valve Kit M60-60460
MOOSE RACING
$196.95If you're running high-RPM applications or extended track sessions, OEM titanium intake valves won't cut it—they're the first component to show fatigue under sustained load. The MOOSE RACING Black Diamond stainless steel conversion kit replaces them with...09262448- SKU:
- 09262448
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- VALVE KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- APPLICATION:
- INTAKE
$196.95 -
MOOSE RACING Intake Valve Kit M60-60470
MOOSE RACING
$217.95If you're running high-mileage or high-boost applications, OEM titanium intake valves become a reliability liability. The MOOSE RACING Black Diamond stainless steel conversion kit extends valve train life by up to 4x while improving flow...09262449- SKU:
- 09262449
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- MATERIAL:
- STAINLESS STEEL
- APPLICATION:
- INTAKE
- PRODUCT NAME:
- VALVE KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$217.95 -
MOOSE RACING Valve and Spring Kit M60-61160
MOOSE RACING
$196.95If you're running high-performance applications that demand reliability over thousands of miles, OEM titanium intake valves hit a durability ceiling. The MOOSE RACING Valve and Spring Kit M60-61160 replaces that ceiling with stainless steel Black Diamond...09262454- SKU:
- 09262454
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- APPLICATION:
- EXHAUST
- MATERIAL:
- STAINLESS STEEL
- APPLICATION:
- INTAKE
- PRODUCT NAME:
- VALVE AND SPRING KIT
$196.95 -
MOOSE RACING Valve and Spring Kit M60-61260
MOOSE RACING
$196.95If you're running your engine hard, valve train durability becomes critical—and OEM titanium intake valves simply can't keep pace with sustained high-performance demands. The MOOSE RACING Valve and Spring Kit M60-61260 replaces them with stainless steel...09262455- SKU:
- 09262455
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- UNITS:
- KIT
- APPLICATION:
- EXHAUST
- MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- VALVE AND SPRING KIT
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- INTAKE
$196.95 -
MOOSE RACING Valve Kit M30-32270
MOOSE RACING
$274.95If you're pushing your engine to the limit, your valvetrain needs to match that commitment. Stock valves are engineered for longevity, not peak performance—they flex under high RPM loads and limit your engine's breathing potential. The MOOSE RACING Valve...09262576- SKU:
- 09262576
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- MATERIAL:
- TITANIUM
- APPLICATION:
- INTAKE
- MODEL:
- PRO
- PRODUCT NAME:
- VALVE KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- APPLICATION:
- EXHAUST
- MATERIAL:
- STAINLESS STEEL
$274.95 -
MOOSE RACING Crank Bearing - YZ 65/85 24-1117
MOOSE RACING
$53.95A worn or failing crankshaft bearing will quickly rob your YZ 65/85 of reliability and throttle response—two things you can't afford to lose on the track or trail. MOOSE Racing's precision bearings restore the tight tolerances your engine demands, while...09240604- SKU:
- 09240604
- Availability:
- Ships Same Business Day
- Weight:
- 0.66 LBS
- PRODUCT NAME:
- BEARING
- UNITS:
- KIT
- APPLICATION:
- CRANKSHAFT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- BALL
$53.95 -
MOOSE RACING Crank Bearing - KXF/RMZ 24-1081
MOOSE RACING
$56.95The crankshaft is the heart of your 2-stroke engine, and worn or failing bearings will kill performance and reliability faster than anything else. MOOSE Racing crank bearings are precision-engineered to restore tight tolerances and smooth rotation,...09240103- SKU:
- 09240103
- Availability:
- Ships Same Business Day
- Weight:
- 0.94 LBS
- PRODUCT NAME:
- BEARING
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- BALL
- APPLICATION:
- CRANKSHAFT
$56.95 -
MOOSE RACING Complete Motor Gasket Kit - KTM/Husqvarna 808330
MOOSE RACING
$88.86A complete engine and transmission rebuild demands precision gaskets and seals that won't fail under load—OEM parts carry premium pricing that Moose Racing eliminates without compromising quality. This comprehensive kit includes every gasket, o-ring, and...09341684- SKU:
- 09341684
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- PRODUCT NAME:
- GASKET
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
$88.86 -
MOOSE RACING Complete Motor Gasket Kit - KTM/Husqvarna 808333
MOOSE RACING
$87.56A complete engine and transmission rebuild demands precision gaskets and seals that won't compromise your work—this kit eliminates the hassle of sourcing individual components while cutting costs well below OEM pricing. MOOSE Racing gasket sets are...09341685- SKU:
- 09341685
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- TYPE:
- ENGINE
$87.56 -
MOOSE RACING Complete Motor Gasket Kit - KTM/Husaberg/Husqvarna 250 808334
MOOSE RACING
$90.50A complete engine and transmission rebuild demands precision gaskets and seals that won't compromise reliability or performance. The MOOSE RACING Complete Motor Gasket Kit eliminates the guesswork and expense of sourcing individual components, delivering...09341686- SKU:
- 09341686
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- TYPE:
- ENGINE
$90.50Qty in Cart: 0Quantity:Price:$90.50Subtotal: -
MOOSE RACING Complete Motor Gasket Kit - KTM/Husaberg/Husqvarna 300 808335
MOOSE RACING
$80.32A complete engine rebuild demands precision gaskets and seals that won't compromise your engine's integrity or cost you a fortune. The MOOSE RACING Complete Motor Gasket Kit eliminates the guesswork of sourcing individual components, giving you every...09341687- SKU:
- 09341687
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- TYPE:
- ENGINE
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
$80.32 -
MOOSE RACING Complete Motor Gasket Kit - KX85 808419
MOOSE RACING
$58.40A complete engine and transmission rebuild demands precision-fit gaskets and seals that won't compromise your performance gains. The MOOSE RACING Complete Motor Gasket Kit eliminates the guesswork of sourcing individual components—every gasket, o-ring,...09341689- SKU:
- 09341689
- Availability:
- Ships Same Business Day
- Weight:
- 0.14 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- TYPE:
- ENGINE
- PRODUCT NAME:
- GASKET
$58.40 -
MOOSE RACING Top End Gasket Kit - 250SX/XC 810333
MOOSE RACING
$47.28When you're rebuilding a 250SX/XC top end, using OEM-equivalent gaskets and seals is non-negotiable—they're what keeps compression stable, oil where it belongs, and your engine reliable between races. The MOOSE RACING Top End Gasket Kit gives you every...09341690- SKU:
- 09341690
- Availability:
- Ships Same Business Day
- Weight:
- 0.07 LBS
- PRODUCT NAME:
- GASKET
- TYPE:
- TOP END
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$47.28 -
MOOSE RACING Top End Gasket Kit - 300/XC/XCW 810335
MOOSE RACING
$40.11A top-end rebuild demands precision—and this Moose Racing gasket kit delivers every seal and gasket you need without the OEM price tag. Whether you're replacing a worn piston or raising compression, this U.S.-made kit gives you the reliability to trust...09341691- SKU:
- 09341691
- Availability:
- Ships Same Business Day
- Weight:
- 0.07 LBS
- PRODUCT NAME:
- GASKET
- TYPE:
- TOP END
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$40.11 -
MOOSE RACING Motor Seals - KX/RM 65 822135
MOOSE RACING
$25.63Engine seals wear over time—allowing oil leakage, contamination, and performance loss—making a complete gasket and seal kit essential for any serious rebuild. MOOSE Racing Motor Seals deliver OEM-equivalent reliability at a fraction of dealership...M822135- SKU:
- M822135
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- APPLICATION:
- ENGINE
- UNITS:
- SET
- PRODUCT NAME:
- SEAL
- TYPE:
- OIL
- RIDING STYLE:
- OFF-ROAD
$25.63Qty in Cart: 0Quantity:Price:$25.63Subtotal: -
MOOSE RACING Clutch Cover Gasket 816547
MOOSE RACING
$11.64A failing clutch cover gasket leads to oil seepage, contamination, and potential engine damage—exactly the kind of preventable failure that costs you track time and money. The MOOSE RACING Clutch Cover Gasket 816547 delivers OEM-quality sealing with the...09340572- SKU:
- 09340572
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- PRODUCT NAME:
- GASKET
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CLUTCH COVER
$11.64 -
MOOSE RACING Clutch Cover Gasket 816590
MOOSE RACING
$10.66A leaking clutch cover gasket compromises engine sealing and invites oil contamination into your clutch assembly—exactly what you don't need mid-season. The MOOSE RACING Clutch Cover Gasket delivers OEM-equivalent sealing performance at a fraction of OEM...09340573- SKU:
- 09340573
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CLUTCH COVER
- UNITS:
- EACH
- PRODUCT NAME:
- GASKET
$10.66 -
MOOSE RACING Ignition Cover Gasket 816589
MOOSE RACING
$8.13A leaking ignition cover gasket compromises engine sealing and can lead to oil weeping that threatens performance and longevity. The MOOSE RACING Ignition Cover Gasket delivers OEM-quality sealing at a fraction of dealership pricing, making it the smart...09340575- SKU:
- 09340575
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PRODUCT NAME:
- GASKET
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- IGNITION COVER
$8.13 -
MOOSE RACING Clutch Cover Gasket 817731
MOOSE RACING
$12.09A leaking clutch cover gasket compromises engine sealing and can lead to oil loss and contamination. The MOOSE RACING Clutch Cover Gasket 817731 delivers OEM-equivalent sealing performance at a fraction of OEM pricing, using high-tech materials...09340578- SKU:
- 09340578
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- UNITS:
- EACH
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CLUTCH COVER
$12.09 -
MOOSE RACING Top End Gasket Kit - KX250 810464
MOOSE RACING
$46.75A top-end rebuild demands precision gaskets and seals that won't compromise engine integrity or cost you a fortune. The MOOSE RACING Top End Gasket Kit delivers OEM-quality components at a fraction of the price, giving you the confidence to rebuild your...09340333- SKU:
- 09340333
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET
$46.75
