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 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...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...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...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...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...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
$75.94 -
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...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...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...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...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...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...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...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,...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...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...09341440- SKU:
- 09341440
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- TYPE:
- TOP END
$52.54Qty in Cart: 0Quantity:Price:$52.54Subtotal: -
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...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...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
$78.91Qty in Cart: 0Quantity:Price:$78.91Subtotal: -
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...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...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
$234.98Qty in Cart: 0Quantity:Price:$234.98Subtotal: -
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...09341446- SKU:
- 09341446
- Availability:
- Ships Same Business Day
- Weight:
- 0.49 LBS
$162.00
