Dirt Bike Engine Gaskets and Kits
Dirt Bike Engine Gaskets & Top-End Kits for Yamaha, Honda XR650L & CRF at JJ Motorsports
Refresh your dirt bike's top end with premium engine gaskets and complete kits from JJ Motorsports, precision-manufactured for leak-free sealing, optimal compression, and reliable performance in motocross, enduro, and trail riding. Our selection includes full gasket sets, top-end rebuild kits, O-rings, and head/base gaskets designed for perfect fitment, heat resistance, and easy installation without machining. Compatible with popular models like Yamaha YZ/WR, Honda XR650L, CRF, and more, these high-quality components from trusted brands ensure smoother operation, reduced oil consumption, and extended engine life under dusty, high-RPM conditions. From Moose Racing's comprehensive off-road sets to ProX and Athena's OEM-spec top-end kits, get everything needed for a professional rebuild—head gaskets, valve seals, base gaskets, and more—to restore power and prevent blow-by on every ride.
Shop brands like Moose Racing, ProX, and Athena for race-proven quality. Explore related categories such as dirt bike piston and ring kits for full rebuilds or dirt bike engine for cylinders and valves.
Top Dirt Bike Engine Gaskets & Kits
- Moose Offroad Complete Gasket Set Yamaha 8080037MSE – Full engine gasket kit for Yamaha models; includes all necessary seals, O-rings, and gaskets for complete top-to-bottom rebuild with OEM reliability.
- ProX Top End Gasket Set Honda XR650L 35.1623 – Precision top-end kit for Honda XR650L; features head, base, and valve stem seals for leak-free compression and easy installation.
- Athena Top End Gasket Kit Honda P400210600323 – High-performance top-end rebuild kit for Honda CRF models; includes multi-layer steel head gasket, O-rings, and seals for maximum sealing under extreme conditions.
Browse our in-stock inventory below with same-day shipping and expert support. Free shipping on orders over $99! Questions? Contact us for fitment advice!
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
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MOOSE RACING Top End Gasket Kit - CR125R 810233
MOOSE RACING
$42.36When you're rebuilding a CR125R top end, gasket failure isn't an option—it compromises compression, invites oil leakage, and can sideline your bike mid-season. The MOOSE RACING Top End Gasket Kit eliminates guesswork by delivering every seal, O-ring, and...M810233- SKU:
- M810233
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- TOP END
$42.36 -
MOOSE RACING Top End Gasket Kit - CR125 810235
MOOSE RACING
$37.29A top-end rebuild demands precision components that won't compromise reliability or performance. The MOOSE RACING Gasket Kit delivers OEM-quality seals at a fraction of the cost, giving you complete confidence when reassembling your CR125 after a piston...M810235- SKU:
- M810235
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- KIT
$37.29Qty in Cart: 0Quantity:Price:$37.29Subtotal: -
MOOSE RACING Top End Gasket Kit - CR250 810251
MOOSE RACING
$17.46A top-end rebuild demands precision gaskets and seals that match OEM specifications without the premium OEM price tag. The MOOSE RACING gasket kit delivers complete coverage for CR250 rebuilds—every gasket, O-ring, and seal you need in one package,...M810251- SKU:
- M810251
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- KIT
$17.46 -
MOOSE RACING Top End Gasket Kit - CR250R 810252
MOOSE RACING
$21.90When you're rebuilding a CR250R top end, gasket failure isn't an option. This Moose Racing kit eliminates the guesswork by delivering every seal, O-ring, and gasket you need in one package—all manufactured to precise tolerances and backed by proven...M810252- SKU:
- M810252
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- KIT
$21.90 -
MOOSE RACING Top End Gasket Kit - CR250R 810253
MOOSE RACING
$23.33A top-end rebuild demands precision and reliability—cutting corners on gaskets and seals will cost you on track or trail. This Moose Racing kit eliminates the guesswork by bundling every gasket, O-ring, and seal you need for a complete CR250R top-end...M810253- SKU:
- M810253
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
$23.33Qty in Cart: 0Quantity:Price:$23.33Subtotal: -
K&S TECHNOLOGIES Water Pump Repair Kit - CR85R 75-1008
K&S TECHNOLOGIES
$32.95A leaking water pump doesn't just waste coolant—it compromises engine temperature stability and can lead to catastrophic overheating on the track or trail. The K&S Technologies Water Pump Repair Kit supplies all gaskets, seals, and O-rings needed to...09342879- SKU:
- 09342879
- Availability:
- Ships Same Business Day
- Weight:
- 0.26 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP REPAIR
- UNITS:
- KIT
$32.95Qty in Cart: 0Quantity:Price:$32.95Subtotal: -
MOOSE RACING Complete Motor Gasket Kit with Oil Seals - KTM/Husqvarna 8110009
MOOSE RACING
$135.40A complete engine and transmission rebuild demands precision gaskets and seals that won't fail under racing conditions or heavy use. This Moose Racing kit eliminates the guesswork of sourcing individual components—you get everything needed in one box,...09346448- SKU:
- 09346448
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- TYPE:
- ENGINE
$135.40 -
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 -
MOOSE RACING Complete Gasket Kit with Oil Seal - KX 811417
MOOSE RACING
$73.14A complete engine and transmission rebuild requires 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, giving you the confidence to tackle...09340875- SKU:
- 09340875
- Availability:
- Ships Same Business Day
- Weight:
- 0.23 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- TYPE:
- ENGINE
$73.14 -
MOOSE RACING Complete Gasket and Oil Seal Kit 811337
MOOSE RACING
$107.09A complete engine and transmission rebuild requires precision-fit gaskets and seals that won't compromise your work or reliability. The MOOSE RACING Complete Gasket and Oil Seal Kit eliminates the hassle of sourcing individual components while delivering...09341905- SKU:
- 09341905
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- TYPE:
- ENGINE
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
$107.09 -
MOOSE RACING Motor Gasket Kit with Seal - CR125 811231
MOOSE RACING
$90.04A complete engine and transmission rebuild demands precision-fit gaskets and seals that won't compromise your work or wallet. MOOSE Racing delivers genuine OEM-equivalent seals at a fraction of OEM pricing, giving you the confidence to tackle a full...M811231- SKU:
- M811231
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- TYPE:
- ENGINE
$90.04 -
MOOSE RACING Motor Gasket Kit with Seal - CR125 811232
MOOSE RACING
$91.46A complete engine and transmission rebuild demands precision gaskets and seals—factory tolerances won't tolerate improvisation. The MOOSE RACING Motor Gasket Kit delivers OEM-equivalent performance at a fraction of dealership pricing, giving you the...M811232- SKU:
- M811232
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- PRODUCT NAME:
- GASKET
- TYPE:
- ENGINE
- UNITS:
- KIT
$91.46 -
MOOSE RACING Motor Gasket Kit with Seal - CR125 811233
MOOSE RACING
$99.86A complete engine and transmission rebuild requires gaskets and seals that won't fail under load. The MOOSE RACING Motor Gasket Kit eliminates the frustration of sourcing individual components from multiple suppliers while maintaining OEM-level fit and...M811233- SKU:
- M811233
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- TYPE:
- ENGINE
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
$99.86Qty in Cart: 0Quantity:Price:$99.86Subtotal: -
MOOSE RACING Motor Gasket Kit with Seal - YZ250 811663
MOOSE RACING
$68.97A complete engine and transmission rebuild demands precision gaskets and seals that won't compromise your work or your wallet. This MOOSE RACING Motor Gasket Kit delivers OEM-quality components at a fraction of dealer pricing, letting you rebuild with...M811663- SKU:
- M811663
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- UNITS:
- KIT
- TYPE:
- ENGINE
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
$68.97Qty in Cart: 0Quantity:Price:$68.97Subtotal: -
MOOSE RACING Motor Gasket Kit with Seal - YZ250 811664
MOOSE RACING
$68.97A complete engine and transmission rebuild demands precision gaskets and seals that won't compromise your work—and OEM replacements drain your budget fast. The MOOSE RACING Motor Gasket Kit delivers genuine OEM-quality seals at a fraction of the cost, so...M811664- SKU:
- M811664
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- TYPE:
- ENGINE
$68.97 -
MOOSE RACING Motor Gasket Kit with Seal - YZ250 811666
MOOSE RACING
$64.70A complete engine and transmission rebuild demands precision-fit gaskets and seals—and OEM pricing shouldn't dictate your budget. This Moose Racing Motor Gasket Kit delivers genuine OEM-quality components at a fraction of dealership cost, giving you the...M811666- SKU:
- M811666
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- TYPE:
- ENGINE
$64.70 -
MOOSE RACING Motor Gasket Kit with Seal - YZ250 811667
MOOSE RACING
$84.39A complete engine and transmission rebuild demands precision gaskets and seals that won't compromise your YZ250's reliability or performance. This Moose Racing kit eliminates the guesswork of sourcing individual components, giving you OEM-quality seals...M811667- SKU:
- M811667
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- TYPE:
- ENGINE
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- COMPLETE
$84.39 -
MOOSE RACING Motor Gasket Kit with Seal - YZ250 811668
MOOSE RACING
$81.65A complete engine and transmission rebuild demands OEM-quality gaskets and seals without the OEM price tag. This Moose Racing Motor Gasket Kit delivers genuine oil seals paired with precision-formed gaskets, ensuring a leak-free assembly and reliable...M811668- SKU:
- M811668
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- TYPE:
- ENGINE
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
$81.65Qty in Cart: 0Quantity:Price:$81.65Subtotal: -
MOOSE RACING Motor Gasket Kit with Seal - YZ250 811669
MOOSE RACING
$80.18A complete engine and transmission rebuild demands precision components that won't compromise durability or break your budget. The MOOSE RACING Motor Gasket Kit eliminates the guesswork by bundling every gasket and seal your YZ250 needs in one...M811669- SKU:
- M811669
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- TYPE:
- ENGINE
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
$80.18
