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
-
MOOSE RACING Complete Gasket and Oil Seal Kit 811372
MOOSE RACING
$191.24A complete engine and transmission rebuild demands precision-fit gaskets and seals that won't compromise your work or force you to source components piecemeal. This kit eliminates guesswork by...09345368- SKU:
- 09345368
- Availability:
- Ships Same Business Day
- Weight:
- 0.56 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET
- TYPE:
- ENGINE
$191.24Qty in Cart: 0Quantity:Price:$191.24Subtotal: -
MOOSE RACING Top End Gasket Kit - YZ 250 810663
MOOSE RACING
$27.72A 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 seals and a complete set...M810663- SKU:
- M810663
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
$27.72 -
MOOSE RACING Top End Gasket Kit - YZ 250 810664
MOOSE RACING
$21.90A top-end rebuild demands precision—gaskets that seal tight, materials that last, and the confidence that every component fits exactly as engineered. The MOOSE RACING Top End Gasket Kit delivers...M810664- SKU:
- M810664
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
$21.90 -
MOOSE RACING Top End Gasket Kit - YZ 250 810665
MOOSE RACING
$29.14A top-end rebuild demands precision seals and gaskets that won't compromise your engine's integrity or performance. The MOOSE RACING Top End Gasket Kit delivers OEM-quality replacement seals at a...M810665- SKU:
- M810665
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$29.14Qty in Cart: 0Quantity:Price:$29.14Subtotal: -
MOOSE RACING Top End Gasket Kit - YZ 250 810666
MOOSE RACING
$36.47A top-end rebuild demands precision—every gasket, seal, and O-ring must fit perfectly to maintain compression, prevent leaks, and deliver consistent performance. The MOOSE RACING Top End Gasket Kit...M810666- SKU:
- M810666
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- TOP END
$36.47 -
MOOSE RACING Top End Gasket Kit - YZ 250 810668
MOOSE RACING
$36.47When you're rebuilding a YZ 250 top end, gasket and seal integrity directly impacts compression, oil containment, and overall engine reliability. The MOOSE RACING Top End Gasket Kit eliminates the...M810668- SKU:
- M810668
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$36.47Qty in Cart: 0Quantity:Price:$36.47Subtotal: -
MOOSE RACING Top End Gasket Kit - YZ 250 810670
MOOSE RACING
$35.14A top-end rebuild demands precision—using OEM-quality seals and gaskets ensures your YZ 250 runs reliably without the premium OEM price tag. This complete kit eliminates the guesswork of sourcing...M810670- SKU:
- M810670
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- KIT
$35.14 -
MOOSE RACING Motor Gasket Kit with Seal - 600 Grizzly 811833
MOOSE RACING
$178.30A complete engine and transmission rebuild demands precision-fit gaskets and seals—compromising on these components invites leaks, contamination, and catastrophic failure. The MOOSE RACING Motor...M811833- SKU:
- M811833
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- TYPE:
- COMPLETE
- RIDING STYLE:
- ATV
- TYPE:
- ENGINE
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
$178.30 -
MOOSE RACING Motor Gasket Kit with Seal - LT250R 811834
MOOSE RACING
$50.74A complete engine and transmission rebuild demands precision gaskets and seals that fit right the first time—cutting corners here compromises both performance and reliability. The MOOSE RACING Motor...M811834- SKU:
- M811834
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET
- TYPE:
- COMPLETE
- RIDING STYLE:
- ATV
- TYPE:
- ENGINE
$50.74 -
MOOSE RACING Motor Gasket Kit with Seal - LT500R 811835
MOOSE RACING
$80.18A complete engine and transmission rebuild demands precision-fit gaskets and seals—cheap replacements lead to leaks, lost compression, and catastrophic failure. The MOOSE RACING Motor Gasket Kit...M811835- SKU:
- M811835
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- PRODUCT NAME:
- GASKET
- TYPE:
- COMPLETE
- UNITS:
- KIT
- RIDING STYLE:
- ATV
- TYPE:
- ENGINE
$80.18Qty in Cart: 0Quantity:Price:$80.18Subtotal: -
MOOSE RACING Motor Gasket Kit with Seal - Trail Boss/Magnum 811836
MOOSE RACING
$100.84A complete engine and transmission rebuild requires precision-fit gaskets and seals that won't compromise your work or your budget. This MOOSE RACING kit eliminates the guesswork of sourcing...M811836- SKU:
- M811836
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- PRODUCT NAME:
- GASKET
- TYPE:
- COMPLETE
- UNITS:
- KIT
- RIDING STYLE:
- ATV
- TYPE:
- ENGINE
$100.84Qty in Cart: 0Quantity:Price:$100.84Subtotal: -
MOOSE RACING Motor Gasket Kit with Seal - DS650 811853
MOOSE RACING
$156.18A complete engine and transmission rebuild demands precision gaskets and seals that won't compromise your work or your budget. MOOSE Racing delivers OEM-equivalent quality at a fraction of dealership...M811853- SKU:
- M811853
- Availability:
- Ships Same Business Day
- Weight:
- 0.43 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- ATV
- TYPE:
- COMPLETE
- UNITS:
- KIT
- TYPE:
- ENGINE
$156.18 -
MOOSE RACING Inner Clutch Cover Gasket 816020
MOOSE RACING
$14.33A failing clutch cover gasket can compromise your engine's oil containment and lead to costly sealing failures during critical race conditions. The MOOSE RACING Inner Clutch Cover Gasket delivers...09346116- SKU:
- 09346116
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- PRODUCT NAME:
- GASKET
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CLUTCH COVER
$14.33 -
MOOSE RACING Inner Clutch Cover Gasket 816027
MOOSE RACING
$13.18A leaking clutch cover gasket compromises both engine integrity and performance reliability. The MOOSE RACING Inner Clutch Cover Gasket (816027) delivers OEM-equivalent sealing in a cost-effective...09346117- SKU:
- 09346117
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- GASKET
- UNITS:
- EACH
- TYPE:
- CLUTCH COVER
$13.18 -
MOOSE RACING Inner Clutch Cover Gasket 816039
MOOSE RACING
$16.40A leaking inner clutch cover gasket compromises engine sealing and invites oil contamination into critical drivetrain components. MOOSE Racing's OEM-equivalent gasket delivers precise fitment and...09346118- SKU:
- 09346118
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CLUTCH COVER
- UNITS:
- EACH
$16.40 -
MOOSE RACING Inner Clutch Cover Gasket 816068
MOOSE RACING
$13.91A leaking clutch cover gasket will compromise oil containment and create a mess in your engine bay—exactly what you don't need during a rebuild or mid-season maintenance. The MOOSE RACING Inner...09346119- SKU:
- 09346119
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CLUTCH COVER
- UNITS:
- EACH
- PRODUCT NAME:
- GASKET
$13.91 -
MOOSE RACING Inner Clutch Cover Gasket 816084
MOOSE RACING
$13.64A leaking clutch cover doesn't just waste oil—it compromises engine sealing integrity and invites contamination into your drivetrain. The MOOSE RACING Inner Clutch Cover Gasket (816084) delivers a...09346120- SKU:
- 09346120
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CLUTCH COVER
- PRODUCT NAME:
- GASKET
- UNITS:
- EACH
$13.64 -
MOOSE RACING Top End Gasket Kit - XR100 810221
MOOSE RACING
$24.85A top-end rebuild demands precision and reliability—this Moose Racing gasket kit delivers both at a fraction of OEM pricing. Whether you're replacing a worn piston or performing routine maintenance,...M810221- SKU:
- M810221
- Availability:
- Ships Same Business Day
- Weight:
- 0.12 LBS
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$24.85 -
MOOSE RACING Top End Gasket Kit - CR125R 810231
MOOSE RACING
$39.34A top-end rebuild demands precision gaskets and seals that won't compromise your engine's integrity—and Moose Racing delivers OEM-quality components at a fraction of OEM pricing. This complete gasket...M810231- SKU:
- M810231
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- KIT
$39.34Qty in Cart: 0Quantity:Price:$39.34Subtotal: -
MOOSE RACING Top End Gasket Kit - CR125R 810232
MOOSE RACING
$23.33A top-end rebuild demands precision gaskets and seals that won't fail under race conditions or repeated heat cycles. This Moose Racing kit eliminates the guesswork by including every component you...M810232- SKU:
- M810232
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$23.33
