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 Clutch Cover Gasket 819047
MOOSE RACING
$13.64A failing clutch cover gasket compromises engine sealing and invites oil leakage that degrades performance and reliability. The MOOSE RACING 819047 delivers OEM-quality sealing with precision...09345902- SKU:
- 09345902
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CLUTCH COVER
- PRODUCT NAME:
- GASKET
- UNITS:
- EACH
$13.64 -
MOOSE RACING Head Cover Gasket - KTM 819048
MOOSE RACING
$13.64Head cover gaskets are critical sealing components that prevent oil leakage and maintain engine integrity during operation. OEM replacements come at a premium price, but the MOOSE RACING Head Cover...09345903- SKU:
- 09345903
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- RIDING STYLE:
- STREET
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- HEAD COVER
- UNITS:
- EACH
- MATERIAL:
- RUBBER
- PRODUCT NAME:
- GASKET
$13.64 -
MOOSE RACING Complete Motor Gasket Kit - YZ125 808636
MOOSE RACING
$54.00A complete engine and transmission rebuild demands gaskets and seals engineered for precision fit and lasting durability. This Moose Racing kit eliminates the guesswork of sourcing individual...M808636- SKU:
- M808636
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- TYPE:
- ENGINE
$54.00 -
MOOSE RACING Complete Motor Gasket Kit - YZ125 808637
MOOSE RACING
$53.66A complete engine and transmission rebuild demands gaskets and seals that match OEM precision without the OEM price tag. The MOOSE RACING Complete Motor Gasket Kit gives you every gasket, o-ring, and...M808637- SKU:
- M808637
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
$53.66 -
MOOSE RACING Complete Motor Gasket Kit - YZ125 808639
MOOSE RACING
$53.66A complete engine and transmission rebuild demands precision gaskets and seals that won't compromise your work—this Moose Racing kit delivers OEM-quality components at a fraction of the cost. Whether...M808639- SKU:
- M808639
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- TYPE:
- ENGINE
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
$53.66 -
MOOSE RACING Complete Motor Gasket Kit - YZ250 808670
MOOSE RACING
$60.26A complete engine and transmission rebuild demands precision gaskets and seals that won't fail under race conditions or high-mileage wear. The MOOSE RACING Complete Motor Gasket Kit delivers...M808670- SKU:
- M808670
- Availability:
- Ships Same Business Day
- Weight:
- 0.18 LBS
- UNITS:
- KIT
- TYPE:
- ENGINE
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
$60.26 -
MOOSE RACING Complete Motor Gasket Kit - YZ250F/WR250F 808671
MOOSE RACING
$109.78A complete engine and transmission rebuild demands precision gaskets and seals that won't compromise reliability or break your budget. This Moose Racing kit delivers OEM-quality components at a...M808671- SKU:
- M808671
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 LBS
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
$109.78 -
MOOSE RACING Complete Motor Gasket Kit - YZ400F/WR400F 808675
MOOSE RACING
$111.90A complete engine 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...M808675- SKU:
- M808675
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- TYPE:
- ENGINE
$111.90Qty in Cart: 0Quantity:Price:$111.90Subtotal: -
MOOSE RACING Complete Motor Gasket Kit - Yamaha 808676
MOOSE RACING
$111.90A complete engine and transmission rebuild requires precision-fit gaskets and seals that can withstand demanding operating conditions. The MOOSE RACING Complete Motor Gasket Kit eliminates the...M808676- SKU:
- M808676
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- TYPE:
- ENGINE
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
$111.90 -
MOOSE RACING Top End Gasket Kit - CR250R 810261
MOOSE RACING
$47.28When you're rebuilding a CR250R top end, you need gaskets and seals that match OEM precision without the OEM price tag. This Moose Racing kit gives you every component required for a complete top-end...M810261- SKU:
- M810261
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- KIT
$47.28Qty in Cart: 0Quantity:Price:$47.28Subtotal: -
MOOSE RACING Top End Gasket Kit - XR400 810265
MOOSE RACING
$55.47A top-end rebuild demands precision—and compromising on gaskets invites leaks, compression loss, and premature wear. The MOOSE RACING Top End Gasket Kit delivers OEM-quality seals and gaskets at a...M810265- SKU:
- M810265
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$55.47 -
MOOSE RACING Top End Gasket Kit - KTM 65SX 810302
MOOSE RACING
$31.50A top-end rebuild demands precision gaskets and seals that won't compromise engine integrity or require multiple trips back to the workbench. The MOOSE RACING Top End Gasket Kit delivers OEM-quality...M810302- SKU:
- M810302
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$31.50 -
MOOSE RACING Top End Gasket Kit - KTM 125 810304
MOOSE RACING
$32.09A 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,...M810304- SKU:
- M810304
- Availability:
- Ships Same Business Day
- Weight:
- 0.12 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- KIT
$32.09 -
MOOSE RACING Top End Gasket Kit - KTM 360/380 810307
MOOSE RACING
$32.09When you're rebuilding a KTM 360/380 top end, gasket failure isn't an option. The MOOSE RACING Top End Gasket Kit gives you OEM-quality sealing at a fraction of the cost, with every component...M810307- SKU:
- M810307
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- KIT
$32.09 -
MOOSE RACING Top End Gasket Kit - 200SX 810308
MOOSE RACING
$32.09A top-end rebuild demands precision—gaskets and seals that won't weep, leak, or fail under load. The MOOSE RACING Top End Gasket Kit eliminates the risk of mixing incompatible OEM and aftermarket...M810308- SKU:
- M810308
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$32.09Qty in Cart: 0Quantity:Price:$32.09Subtotal: -
MOOSE RACING Top End Gasket Kit - 125SX/EX 810309
MOOSE RACING
$32.09A complete top-end rebuild requires precision-matched gaskets and seals that maintain compression integrity and prevent oil leakage—OEM parts command premium pricing, but the MOOSE RACING Top End...M810309- SKU:
- M810309
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$32.09 -
MOOSE RACING Top End Gasket Kit - KX80 810402
MOOSE RACING
$18.96A complete top-end gasket kit is essential when rebuilding your KX80 after a piston replacement or routine engine maintenance. MOOSE Racing delivers OEM-quality seals and gaskets at a fraction of OEM...M810402- SKU:
- M810402
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- TOP END
$18.96 -
MOOSE RACING Top End Gasket Kit - KX80 810403
MOOSE RACING
$18.96A top-end rebuild demands precision gaskets and seals that won't fail under race conditions or repeated use. The MOOSE RACING Top End Gasket Kit delivers OEM-quality components at a fraction of the...M810403- SKU:
- M810403
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$18.96 -
MOOSE RACING Top End Gasket Kit - KX80 810404
MOOSE RACING
$23.33When you're rebuilding a KX80 top end, every gasket and seal matters—factory originals drain your wallet, but cheap alternatives compromise reliability. The MOOSE RACING Top End Gasket Kit delivers...M810404- SKU:
- M810404
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- TOP END
$23.33 -
MOOSE RACING Top End Gasket Kit - YZ 400 F 810675
MOOSE RACING
$68.81A top-end rebuild demands precision gaskets and seals that won't compromise engine integrity or require you to choose between quality and cost. The MOOSE RACING Top End Gasket Kit delivers...M810675- SKU:
- M810675
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- UNITS:
- KIT
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
$68.81
