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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- Price
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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...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: $57.95Now: $49.00Was: $57.95A 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...09347194- SKU:
- 09347194
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
MSRP: $57.95Now: $49.00Was: $57.95 -
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...09347195- SKU:
- 09347195
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
$17.79Qty in Cart: 0Quantity:Price:$17.79Subtotal: -
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...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...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...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...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...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...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,...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...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...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...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...09347193- SKU:
- 09347193
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
$6.01Qty in Cart: 0Quantity:Price:$6.01Subtotal: -
On Sale
VINTCO Top End Gasket Kit - Honda KTE010
VINTCO
MSRP: $37.95Now: $35.29Was: $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...09347223- SKU:
- 09347223
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
MSRP: $37.95Now: $35.29Was: $37.95 -
On Sale
VINTCO Top End Gasket Kit - Honda KTE008
VINTCO
MSRP: $39.95Now: $37.15Was: $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...09347225- SKU:
- 09347225
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
MSRP: $39.95Now: $37.15Was: $39.95 -
On Sale
VINTCO Top End Gasket Kit - Suzuki KTE024
VINTCO
MSRP: $39.95Now: $37.15Was: $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...09347226- SKU:
- 09347226
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
MSRP: $39.95Now: $37.15Was: $39.95 -
On Sale
VINTCO Top End Gasket Kit - Yamaha KTE042
VINTCO
MSRP: $39.95Now: $37.15Was: $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...09347227- SKU:
- 09347227
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
MSRP: $39.95Now: $37.15Was: $39.95Qty in Cart: 0Quantity:Price:MSRP: $39.95Now: $37.15Was: $39.95Subtotal: -
On Sale
VINTCO Top End Gasket Kit - Yamaha KTE043
VINTCO
MSRP: $54.95Now: $51.10Was: $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...09347229- SKU:
- 09347229
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
MSRP: $54.95Now: $51.10Was: $54.95Qty in Cart: 0Quantity:Price:MSRP: $54.95Now: $51.10Was: $54.95Subtotal: -
On Sale
VINTCO Top End Gasket Kit - Suzuki KTE023
VINTCO
MSRP: $24.95Now: $23.20Was: $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...09347230- SKU:
- 09347230
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
MSRP: $24.95Now: $23.20Was: $24.95
