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 - KTM 810976
MOOSE RACING
$71.76Whether you're rebuilding after a piston replacement or performing routine top-end maintenance, a quality gasket kit is non-negotiable for engine reliability. The MOOSE RACING Top End Gasket Kit delivers OEM-equivalent sealing with domestic manufacturing...09345365- SKU:
- 09345365
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- TYPE:
- TOP END
- RIDING STYLE:
- OFF-ROAD
$71.76 -
MOOSE RACING Motor Gasket Kit with Seal - PW50 811601
MOOSE RACING
$30.09A complete engine and transmission rebuild demands precision gaskets and seals that won't compromise your engine's integrity or your budget. The Moose Racing Motor Gasket Kit eliminates the guesswork and expense of sourcing individual components—you get...09340118- SKU:
- 09340118
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
$30.09 -
MOOSE RACING Complete Motor Gasket Kit - CR125 808233
MOOSE RACING
$37.82A complete engine and transmission rebuild demands precision gaskets and seals that won't compromise your work—especially when you're investing time and money into a fresh motor. The MOOSE RACING Complete Motor Gasket Kit delivers OEM-quality components...M808233- SKU:
- M808233
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- TYPE:
- ENGINE
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
$37.82 -
MOOSE RACING Complete Motor Gasket Kit - CR125 808235
MOOSE RACING
$58.40A complete engine and transmission rebuild demands precision-fit gaskets that won't compromise reliability or performance. The MOOSE RACING Complete Motor Gasket Kit eliminates the guesswork of sourcing individual components, giving you every seal,...M808235- SKU:
- M808235
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
$58.40 -
MOOSE RACING Complete Motor Gasket Kit - CR125 808236
MOOSE RACING
$75.94A complete engine and transmission rebuild demands precision gaskets and seals that won't fail mid-season. The MOOSE RACING Complete Motor Gasket Kit eliminates the guesswork by delivering every gasket, o-ring, and seal you need in one...M808236- SKU:
- M808236
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- TYPE:
- ENGINE
$75.94Qty in Cart: 0Quantity:Price:$75.94Subtotal: -
MOOSE RACING Complete Motor Gasket Kit - CR125R 808237
MOOSE RACING
$75.94A complete engine rebuild requires precision gasket and seal fitment—any compromise risks compression loss, oil seepage, and catastrophic engine failure. The MOOSE RACING Complete Motor Gasket Kit for CR125R eliminates guesswork with OEM-quality...M808237- SKU:
- M808237
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- TYPE:
- ENGINE
$75.94 -
MOOSE RACING Complete Motor Gasket Kit - CR250 808259
MOOSE RACING
$68.81A complete engine and transmission rebuild demands gasket and seal integrity you can trust—compromised seals lead to oil leaks, loss of compression, and catastrophic engine failure. The MOOSE RACING Complete Motor Gasket Kit delivers OEM-equivalent...M808259- SKU:
- M808259
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET
$68.81 -
MOOSE RACING Complete Motor Gasket Kit - CR250R 808261
MOOSE RACING
$86.16A complete engine and transmission rebuild demands gasket and seal integrity—any leak or failure compromises performance and reliability. The MOOSE RACING Complete Motor Gasket Kit delivers OEM-quality components at a fraction of OEM pricing, letting you...M808261- SKU:
- M808261
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- TYPE:
- ENGINE
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
$86.16Qty in Cart: 0Quantity:Price:$86.16Subtotal: -
MOOSE RACING Complete Motor Gasket Kit - CRF450 808267
MOOSE RACING
$149.21A complete engine rebuild requires precision gaskets and seals that won't compromise your CRF450's reliability. This Moose Racing kit eliminates the frustration of sourcing individual components by bundling everything you need for a full engine and...M808267- SKU:
- M808267
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET
$149.21 -
MOOSE RACING Complete Motor Gasket Kit - XR50 808209
MOOSE RACING
$64.22A complete engine and transmission rebuild demands gasket and seal integrity—compromising here means risking oil leaks, compression loss, and costly downtime. The MOOSE RACING Complete Motor Gasket Kit delivers OEM-quality components at a fraction of...09340129- SKU:
- 09340129
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET
$64.22 -
MOOSE RACING Complete Motor Gasket Kit - XR70 808210
MOOSE RACING
$64.22A complete engine and transmission rebuild demands precision-fit gaskets and seals that won't compromise your work. This Moose Racing kit eliminates the guesswork and expense of sourcing individual components—you get everything needed in one set, with...09340130- SKU:
- 09340130
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- TYPE:
- ENGINE
$64.22 -
MOOSE RACING Complete Motor Gasket Kit - CRF450R 808278
MOOSE RACING
$172.14A complete engine and transmission rebuild demands precision gaskets and seals that won't fail mid-season. The MOOSE RACING Complete Motor Gasket Kit delivers OEM-equivalent quality at a fraction of the cost, with every gasket, o-ring, and valve seal...09341437- SKU:
- 09341437
- Availability:
- Ships Same Business Day
- Weight:
- 0.32 LBS
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
$172.14 -
MOOSE RACING Complete Motor Gasket Kit - 450SXF/450XCF 808331
MOOSE RACING
$121.47A complete engine and transmission rebuild demands gaskets and seals that won't compromise durability or performance. This MOOSE RACING kit eliminates the guesswork by delivering every gasket, o-ring, and valve seal you need in one package—all...09341438- SKU:
- 09341438
- Availability:
- Ships Same Business Day
- Weight:
- 0.27 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET
- TYPE:
- ENGINE
$121.47 -
MOOSE RACING Top End Gasket Kit - CRF150R 810213
MOOSE RACING
$67.01A quality top-end gasket kit is essential when rebuilding a CRF150R engine, whether you're replacing a worn piston or performing routine maintenance. The MOOSE RACING 810213 delivers OEM-equivalent sealing performance at a fraction of OEM pricing, using...09341439- SKU:
- 09341439
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
$67.01 -
MOOSE RACING Top End Gasket Kit - CRF150F 810248
MOOSE RACING
$52.54When you're rebuilding a CRF150F top end, you need gaskets and seals that won't compromise your engine's integrity or your wallet. The MOOSE RACING Top End Gasket Kit delivers OEM-quality components at a fraction of the cost, letting you complete a full...09341440- SKU:
- 09341440
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- TYPE:
- TOP END
$52.54 -
MOOSE RACING Top End Gasket Kit - CRF450 810278
MOOSE RACING
$83.22A top-end rebuild demands precision—factory gasket sets from OEM suppliers come with premium pricing that doesn't reflect the quality. The MOOSE RACING Top End Gasket Kit delivers OEM-equivalent reliability and fit at a fraction of the cost, using...09341441- SKU:
- 09341441
- Availability:
- Ships Same Business Day
- Weight:
- 0.24 LBS
- TYPE:
- TOP END
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
$83.22 -
MOOSE RACING Top End Gasket Kit - 450SXF 810331
MOOSE RACING
$78.91A top-end rebuild demands precision gaskets and seals that won't compromise engine integrity or break your budget. The MOOSE RACING Top End Gasket Kit delivers OEM-quality components at a fraction of the cost, letting you handle a piston replacement or...09341442- SKU:
- 09341442
- Availability:
- Ships Same Business Day
- Weight:
- 0.18 LBS
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
$78.91 -
MOOSE RACING Motor Gasket Kit with Seal - CRF 811213
MOOSE RACING
$221.09A complete engine and transmission rebuild demands precision-fit gaskets and seals—cutting corners here risks oil leaks, compression loss, and catastrophic failure down the line. The MOOSE RACING Motor Gasket Kit delivers OEM-equivalent fitment and...09341443- SKU:
- 09341443
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
- UNITS:
- KIT
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- PRODUCT NAME:
- GASKET
$221.09 -
MOOSE RACING Motor Gasket Kit with Seal - CRF 811278
MOOSE RACING
$234.98A complete engine and transmission rebuild demands precision-fit gaskets and seals—factory tolerances won't tolerate shortcuts. The MOOSE RACING Motor Gasket Kit delivers OEM-equivalent reliability at a fraction of OEM pricing, giving you the confidence...09341445- SKU:
- 09341445
- Availability:
- Ships Same Business Day
- Weight:
- 0.47 LBS
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
$234.98 -
MOOSE RACING Motor Gasket Kit with Seal - SXF 811331
MOOSE RACING
$162.00A complete engine and transmission rebuild demands gasket and seal integrity—any compromise here leads to leaks, contamination, and catastrophic failure. The MOOSE RACING Motor Gasket Kit delivers OEM-equivalent sealing performance at a fraction of...09341446- SKU:
- 09341446
- Availability:
- Ships Same Business Day
- Weight:
- 0.49 LBS
$162.00
