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!
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On Sale
PROX Top End Gasket Set - Honda CRF450R 35.1429
PROX
MSRP: $104.95Now: $89.00Was: $104.95A top-end rebuild demands precision—and gasket failure isn't an option when you're pushing your CRF450R to the limit. The PROX Top End Gasket Set delivers OEM-grade sealing with materials engineered to withstand sustained high RPM performance and thermal...09345683- SKU:
- 09345683
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
MSRP: $104.95Now: $89.00Was: $104.95Qty in Cart: 0Quantity:Price:MSRP: $104.95Now: $89.00Was: $104.95Subtotal: -
On Sale
ATHENA Water Pump Gasket Kit - Yamaha P400485475014
ATHENA
MSRP: $54.95Now: $49.00Was: $54.95A worn or degraded water pump gasket kit compromises your cooling system's integrity, leading to coolant leaks, overheating, and potential engine damage. The ATHENA Water Pump Gasket Kit for Yamaha delivers OEM-equivalent sealing performance with...09347194- SKU:
- 09347194
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
MSRP: $54.95Now: $49.00Was: $54.95 -
MOOSE OFFROAD Gasket Clutch Inner - Honda 816353MSE
MOOSE OFFROAD
$17.79Ignition cover leaks compromise engine sealing and can lead to oil weeping that fouls your ignition system. The MOOSE OFFROAD Gasket Clutch Inner (816353MSE) is a direct replacement for Honda applications, engineered to restore a dependable seal and...09347195- SKU:
- 09347195
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
$17.79 -
MOOSE OFFROAD Ignition Cover Gasket - Honda 816345MSE
MOOSE OFFROAD
$13.50A failing ignition cover gasket compromises your engine's seal integrity and invites oil seepage that can damage ignition components and create costly problems down the line. This OEM-equivalent gasket from MOOSE OFFROAD restores a reliable barrier...09347196- SKU:
- 09347196
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
$13.50Qty in Cart: 0Quantity:Price:$13.50Subtotal: -
MOOSE OFFROAD Gasket Kit with Oil Seal - Honda 8110043MSE
MOOSE OFFROAD
$112.56A complete engine and transmission rebuild demands precision—and compromised gaskets or seals will undermine even the best machine work. This MOOSE OFFROAD Gasket Kit gives you factory-correct sealing surfaces across your entire drivetrain, eliminating...09347197- SKU:
- 09347197
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
$112.56 -
MOOSE OFFROAD Complete Motor Gasket Kit - Honda 808213MSE
MOOSE OFFROAD
$169.49A complete engine and transmission rebuild demands precision gaskets and seals that won't compromise reliability or performance. MOOSE Offroad delivers a comprehensive kit with all necessary components at a fraction of OEM pricing, letting you rebuild...09347198- SKU:
- 09347198
- Availability:
- Ships Same Business Day
- Weight:
- 0.24 LBS
$169.49 -
MOOSE OFFROAD Top End Gasket Kit - Honda 8100042MSE
MOOSE OFFROAD
$106.05A top-end rebuild demands precision gasket-to-surface contact—any compromise in material quality or fit tolerance will result in oil weeping, combustion leakage, and accelerated wear. The MOOSE OFFROAD Top End Gasket Kit delivers OEM-specification...09347199- SKU:
- 09347199
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
$106.05 -
MOOSE OFFROAD Complete Gasket Kit - Yamaha 8080028MSE
MOOSE OFFROAD
$154.90A complete engine and transmission rebuild demands precision gaskets that won't fail under load—and OEM replacements come with OEM pricing. The MOOSE OFFROAD Complete Gasket Kit delivers durability and accuracy at a fraction of the cost, letting you...09347200- SKU:
- 09347200
- Availability:
- Ships Same Business Day
- Weight:
- 0.26 LBS
$154.90 -
MOOSE OFFROAD Complete Gasket Kit - Honda 8080040MSE
MOOSE OFFROAD
$86.16A complete engine and transmission rebuild demands precision-fit gaskets that won't compromise your reliability or budget. The MOOSE OFFROAD Complete Gasket Kit delivers OEM-quality sealing at a fraction of the cost, with every gasket and o-ring...09347201- SKU:
- 09347201
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
$86.16 -
MOOSE OFFROAD Top End Gasket Kit - Suzuki 8100037MSE
MOOSE OFFROAD
$20.15A top-end rebuild demands precision—mismatched or worn gaskets compromise compression, invite oil weeping, and sabotage engine reliability. The MOOSE OFFROAD Top End Gasket Kit delivers a complete, OEM-quality solution at a fraction of dealer pricing,...09347202- SKU:
- 09347202
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
$20.15Qty in Cart: 0Quantity:Price:$20.15Subtotal: -
MOOSE OFFROAD Exhaust Gasket Kit - Yamaha 823200MSE
MOOSE OFFROAD
$29.14Exhaust gaskets are critical wear items that deteriorate under thermal cycling and vibration, leading to exhaust leaks that compromise performance and increase emissions. The MOOSE OFFROAD Exhaust Gasket Kit delivers OEM-quality replacement gaskets and...09347189- SKU:
- 09347189
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
$29.14 -
MOOSE OFFROAD Exhaust Gasket Kit - Yamaha 823201MSE
MOOSE OFFROAD
$15.81A compromised exhaust seal costs you power and reliability. This Moose Offroad gasket kit eliminates leaks at critical connection points, restoring the backpressure and flow characteristics your engine was designed for. Whether you're running stock or...09347190- SKU:
- 09347190
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
$15.81 -
MOOSE OFFROAD Exhaust Gasket Kit - KTM 823195MSE
MOOSE OFFROAD
$16.37Exhaust gasket deterioration is one of the most common causes of performance loss and exhaust leaks on KTM 4-stroke engines. A failing gasket compromises seal integrity, allowing unburned fuel to escape and throwing off your air-fuel ratio—resulting in...09347191- SKU:
- 09347191
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
$16.37 -
MOOSE OFFROAD Exhaust Gasket Kit - Beta 823205MSE
MOOSE OFFROAD
$6.01A failing exhaust gasket compromises both performance and reliability—allowing exhaust gases to escape before they reach your powerband and introducing unwanted air leaks that throw off your fuel mapping. The MOOSE OFFROAD Exhaust Gasket Kit delivers...09347193- SKU:
- 09347193
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
$6.01 -
VINTCO Top End Gasket Kit - Honda KTE010
VINTCO
$37.95A failed top end gasket can compromise cylinder compression, cause coolant leaks, and force an engine back into the shop. The VINTCO KTE010 delivers OEM-equivalent sealing with precision-engineered gaskets that maintain reliability through...09347223- SKU:
- 09347223
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
$37.95 -
VINTCO Top End Gasket Kit - Honda KTE008
VINTCO
$39.95A leaking top end gasket can compromise compression, waste fuel, and force you to abandon a build mid-season. The VINTCO KTE008 Top End Gasket Kit supplies all critical sealing surfaces needed for a complete top end rebuild, manufactured to OEM or better...09347225- SKU:
- 09347225
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
$39.95 -
VINTCO Top End Gasket Kit - Suzuki KTE024
VINTCO
$39.95A top-end gasket kit is essential when rebuilding or refreshing your Suzuki engine—worn gaskets are a common source of oil leaks, compression loss, and coolant seepage that compromise performance and reliability. The VINTCO KTE024 delivers OEM-equivalent...09347226- SKU:
- 09347226
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
$39.95 -
VINTCO Top End Gasket Kit - Yamaha KTE042
VINTCO
$39.95A failed top end gasket can compromise compression, cause oil leaks, and derail your rebuild before it even runs. The VINTCO KTE042 Top End Gasket Kit delivers OEM-equivalent sealing reliability without the OEM price tag, ensuring your Yamaha engine...09347227- SKU:
- 09347227
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
$39.95 -
VINTCO Top End Gasket Kit - Yamaha KTE043
VINTCO
$54.95A top-end gasket failure can quickly derail your build and cost you valuable track time. The VINTCO Top End Gasket Kit gives you all the critical sealing surfaces needed for a leak-free, reliable top-end assembly without sourcing individual gaskets from...09347229- SKU:
- 09347229
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
$54.95 -
VINTCO Top End Gasket Kit - Suzuki KTE023
VINTCO
$24.95A failing top end gasket can compromise combustion seal integrity and lead to coolant or oil seepage—both expensive problems if left unchecked. The VINTCO KTE023 kit eliminates guesswork by bundling all critical gaskets needed for a complete top end...09347230- SKU:
- 09347230
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
$24.95
