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 Motor Gasket Kit with Seal - XR80 811207
MOOSE RACING
$70.33A complete engine and transmission rebuild demands precision-fit gaskets and seals that won't compromise your work—OEM-spec components at a fraction of the cost. MOOSE Racing delivers genuine replacement seals paired with U.S.-manufactured gaskets...M811207- SKU:
- M811207
- Availability:
- Ships Same Business Day
- Weight:
- 0.22 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- TYPE:
- ENGINE
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
$70.33 -
MOOSE RACING Motor Gasket Kit with Seal - XR80 811208
MOOSE RACING
$89.83A complete engine and transmission rebuild demands precision gaskets and seals that won't compromise your work or drain your budget. The MOOSE RACING Motor Gasket Kit delivers OEM-quality replacement seals at a fraction of dealership pricing, letting you...M811208- SKU:
- M811208
- Availability:
- Ships Same Business Day
- Weight:
- 0.22 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- PRODUCT NAME:
- GASKET
- TYPE:
- ENGINE
- UNITS:
- KIT
$89.83 -
MOOSE RACING Motor Gasket Kit with Seal - XR100 811221
MOOSE RACING
$92.89A 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 the cost, letting you rebuild with confidence and zero...M811221- SKU:
- M811221
- Availability:
- Ships Same Business Day
- Weight:
- 0.24 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- TYPE:
- ENGINE
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
$92.89 -
MOOSE RACING Motor Gasket Kit with Seal - CR125 811236
MOOSE RACING
$102.70A complete engine and transmission rebuild demands gaskets and seals that match OEM precision without the premium price tag. This MOOSE RACING kit eliminates the need to source components piecemeal, ensuring every seal and gasket works together as an...M811236- SKU:
- M811236
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET
$102.70 -
MOOSE RACING Complete Motor Gasket Kit - KX250F 808984
MOOSE RACING
$142.06A complete engine and transmission rebuild demands precision-fit gaskets and seals that won't compromise your work. The MOOSE RACING Complete Motor Gasket Kit delivers OEM-quality components at a fraction of the cost, letting you rebuild with confidence...09345881- SKU:
- 09345881
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- GASKET
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
$142.06 -
MOOSE RACING Complete Motor Gasket Kit - CRF450R/RX 808989
MOOSE RACING
$179.72A complete engine and transmission rebuild demands precision gaskets and seals that won't compromise performance or longevity. The MOOSE RACING Complete Motor Gasket Kit eliminates the guesswork and expense of sourcing individual components, giving you a...09345882- SKU:
- 09345882
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- TYPE:
- ENGINE
$179.72 -
MOOSE RACING Complete Motor Gasket Kit - 250 EXC-F 808990
MOOSE RACING
$130.03A complete engine and transmission rebuild demands precision-fit gaskets and seals that won't compromise your work. This MOOSE RACING kit eliminates the frustration of sourcing individual components, giving you every gasket, o-ring, and seal needed for a...09345883- SKU:
- 09345883
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- TYPE:
- ENGINE
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
$130.03 -
MOOSE RACING Top End Gasket Kit Yamaha 810977
MOOSE RACING
$67.11A top-end rebuild demands precision-fit gaskets and seals that won't compromise your engine's integrity or performance. The MOOSE RACING Top End Gasket Kit delivers OEM-quality replacement seals at a fraction of the cost, letting you restore your engine...09345884- SKU:
- 09345884
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- SET
$67.11 -
MOOSE RACING Top End Gasket Kit Kawasaki 810984
MOOSE RACING
$93.21A top-end rebuild demands precision-fit gaskets and seals that won't compromise your engine's integrity or performance. The MOOSE RACING Top End Gasket Kit delivers OEM-equivalent quality at a fraction of the cost, giving you the confidence to push your...09345885- SKU:
- 09345885
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- SET
- PRODUCT NAME:
- GASKET
$93.21 -
MOOSE RACING Top End Gasket Kit - KLX/DRZ 810585
MOOSE RACING
$57.30A 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 gives you every component needed for a complete, reliable rebuild—valve seals, head gaskets, base...M810585- SKU:
- M810585
- Availability:
- Ships Same Business Day
- Weight:
- 0.14 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- BORE SIZE METRIC:
- 94.00 MM
- BORE SIZE:
- 94,00 MM
- ENGINE TYPE:
- 4-STROKE
- UNITS:
- KIT
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
$57.30 -
MOOSE RACING Top End Gasket Kit - DR 650 810586
MOOSE RACING
$35.01A top-end rebuild demands precision and reliability—any compromise on gasket quality will compromise your engine's integrity. The MOOSE RACING Top End Gasket Kit eliminates guesswork by providing every seal, O-ring, and gasket your DR 650 needs in one...M810586- SKU:
- M810586
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
$35.01Qty in Cart: 0Quantity:Price:$35.01Subtotal: -
MOOSE RACING Top End Gasket Kit - YZ 125 810630
MOOSE RACING
$21.90A top-end rebuild demands precision gaskets and seals that won't compromise your engine's reliability or performance. The MOOSE RACING Top End Gasket Kit delivers OEM-quality components at a fraction of the cost, so you can confidently refresh your YZ...M810630- SKU:
- M810630
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- TOP END
$21.90 -
MOOSE RACING Top End Gasket Kit - YZ 125 810631
MOOSE RACING
$24.85A top-end rebuild demands precision gaskets and seals that won't compromise your engine's integrity or cost you a fortune. This Moose Racing kit gives you every component needed to reassemble your YZ 125 with confidence, using domestic materials...M810631- SKU:
- M810631
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$24.85 -
MOOSE RACING Top End Gasket Kit - YZ 125 810632
MOOSE RACING
$24.85When you're rebuilding a YZ 125 top end, gasket integrity determines whether your engine runs flawlessly or develops leaks that compromise performance. This Moose Racing gasket kit delivers OEM-quality sealing at a fraction of OEM pricing, giving you the...M810632- SKU:
- M810632
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- KIT
$24.85Qty in Cart: 0Quantity:Price:$24.85Subtotal: -
MOOSE RACING Top End Gasket Kit - YZ 125 810633
MOOSE RACING
$24.85A top-end rebuild demands precision-fit gaskets and seals—any compromise risks oil leaks, compression loss, and premature wear. The MOOSE RACING Top End Gasket Kit delivers OEM-quality replacement seals and a complete gasket set at a fraction of OEM...M810633- SKU:
- M810633
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$24.85 -
MOOSE RACING Top End Gasket Kit - YZ 250 810661
MOOSE RACING
$29.14A top-end rebuild demands precision gaskets and seals that won't compromise reliability or performance. The MOOSE RACING Top End Gasket Kit delivers OEM-quality components at a fraction of the cost, letting you confidently refresh your YZ 250 engine...M810661- SKU:
- M810661
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- KIT
$29.14 -
MOOSE RACING Top End Gasket Kit - CR80 810205
MOOSE RACING
$24.85A top-end rebuild demands precision and reliability—and OEM gasket kits come with OEM pricing. The MOOSE RACING Top End Gasket Kit delivers genuine OEM replacement seals paired with high-tech materials at a fraction of the cost, so you can confidently...M810205- SKU:
- M810205
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$24.85Qty in Cart: 0Quantity:Price:$24.85Subtotal: -
MOOSE RACING Top End Gasket Kit - CR80R 810206
MOOSE RACING
$26.26A top-end rebuild demands precision and reliability—cutting corners on gaskets and seals is how engines fail. This Moose Racing kit gives you OEM-quality seals and gaskets at a fraction of the cost, with every component engineered for accurate fit and...M810206- SKU:
- M810206
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- TOP END
$26.26 -
MOOSE RACING Top End Gasket Kit - XR80 810207
MOOSE RACING
$26.26A quality gasket kit is essential when rebuilding your XR80's top end—OEM replacements come with premium pricing, but this Moose Racing set delivers the same reliability at a fraction of the cost. Whether you're doing routine maintenance or a full piston...M810207- SKU:
- M810207
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$26.26 -
MOOSE RACING Top End Gasket Kit - CR250R 810255
MOOSE RACING
$26.26A 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...M810255- SKU:
- M810255
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- KIT
$26.26
