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
ATHENA Top End Gasket Kit - Kawasaki P400250600500
ATHENA
MSRP: $40.95Now: $37.00Was: $40.95When you're prepping your engine for race day, a quality top-end gasket kit is non-negotiable—it's your seal against compression loss, combustion leaks, and mid-race failures. The ATHENA Top End Gasket Kit is engineered specifically for riders who demand...400250600500- SKU:
- 400250600500
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
MSRP: $40.95Now: $37.00Was: $40.95Qty in Cart: 0Quantity:Price:MSRP: $40.95Now: $37.00Was: $40.95Subtotal: -
On Sale
ATHENA Top End Gasket Kit - Kawasaki P400250600252
ATHENA
MSRP: $40.95Now: $37.00Was: $40.95When race season demands peak performance, a fresh top end gasket kit is essential for sealing your engine's compression and eliminating unwanted leakage. The ATHENA P400250600252 gives you the flexibility to run either standard fuel with stock...400250600252- SKU:
- 400250600252
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
MSRP: $40.95Now: $37.00Was: $40.95Qty in Cart: 0Quantity:Price:MSRP: $40.95Now: $37.00Was: $40.95Subtotal: -
On Sale
ATHENA Top End Gasket Kit - Kawasaki P400250600130
ATHENA
MSRP: $34.95Now: $31.00Was: $34.95A properly sealed top end is the foundation of consistent performance, and the ATHENA Top End Gasket Kit ensures your engine maintains compression and prevents coolant or oil weepage during critical race conditions. Whether you're running stock...400250600130- SKU:
- 400250600130
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
MSRP: $34.95Now: $31.00Was: $34.95 -
On Sale
ATHENA Top End Gasket Kit - Kawasaki P400250600089
ATHENA
MSRP: $38.95Now: $35.00Was: $38.95Keep your engine performing at peak efficiency with the ATHENA Top End Gasket Kit, engineered for riders who demand precision between races. Whether you're freshening up your top end before competition or executing mid-season maintenance, this kit...400250600089- SKU:
- 400250600089
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
MSRP: $38.95Now: $35.00Was: $38.95 -
On Sale
ATHENA Top End Gasket Kit - Kawasaki P400250600088/1
ATHENA
MSRP: $16.95Now: $15.00Was: $16.95Whether you're prepping for race day or executing a midseason engine refresh, the ATHENA Top End Gasket Kit delivers the reliability you need when it matters most. This kit gives you the flexibility to run either pump gas with stock compression or step...400250600088- SKU:
- 400250600088
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
MSRP: $16.95Now: $15.00Was: $16.95 -
On Sale
ATHENA Complete Gasket Kit - Honda P400210850520
ATHENA
MSRP: $53.95Now: $49.00Was: $53.95When rebuilding your Honda engine, gasket failure isn't an option—it compromises compression, causes oil leaks, and sidelines your build. The ATHENA Complete Gasket Kit eliminates guesswork by delivering OEM-quality seals engineered to handle sustained...400210850520- SKU:
- 400210850520
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
MSRP: $53.95Now: $49.00Was: $53.95 -
On Sale
ATHENA Complete Gasket Kit - Honda P400210850505/1
ATHENA
MSRP: $115.95Now: $104.00Was: $115.95A complete engine rebuild demands precision-engineered gaskets that maintain integrity across extreme temperatures and pressures—this Athena kit delivers exactly that without compromise. Whether you're rebuilding a stock engine or pushing high-boost...400210850505- SKU:
- 400210850505
- Availability:
- Ships Same Business Day
- Weight:
- 0.44 LBS
MSRP: $115.95Now: $104.00Was: $115.95Qty in Cart: 0Quantity:Price:MSRP: $115.95Now: $104.00Was: $115.95Subtotal: -
On Sale
ATHENA Complete Gasket Kit - Honda P400210850504
ATHENA
MSRP: $70.95Now: $64.00Was: $70.95If you're rebuilding a Honda engine, gasket failure isn't an option—it compromises compression, causes oil leaks, and tanks performance. The ATHENA Complete Gasket Kit delivers the material science and engineering precision needed to hold up under...400210850504- SKU:
- 400210850504
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
MSRP: $70.95Now: $64.00Was: $70.95 -
On Sale
ATHENA Complete Gasket Kit - Honda P400210850500
ATHENA
MSRP: $54.95Now: $49.00Was: $54.95Engine rebuild or top-end refresh? The ATHENA Complete Gasket Kit delivers the sealing reliability professional and serious amateur mechanics demand when precision matters. This comprehensive set eliminates the guesswork of sourcing individual gaskets by...400210850500- SKU:
- 400210850500
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
MSRP: $54.95Now: $49.00Was: $54.95 -
On Sale
ATHENA Complete Gasket Kit - Honda P400210850263
ATHENA
MSRP: $34.95Now: $31.00Was: $34.95A complete gasket kit is essential for any top-end or full engine rebuild, and Athena's engineering ensures you won't face leak issues or premature gasket failure under high RPM and elevated temperatures. This kit includes everything needed for a...400210850263- SKU:
- 400210850263
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
MSRP: $34.95Now: $31.00Was: $34.95 -
On Sale
ATHENA Complete Gasket Kit - Honda P400210850252
ATHENA
MSRP: $60.95Now: $55.00Was: $60.95A complete gasket kit is essential for any engine rebuild or top-end service—it ensures reliable sealing across all critical surfaces and prevents costly leaks that compromise performance and longevity. The ATHENA P400210850252 delivers the precision...400210850252- SKU:
- 400210850252
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
MSRP: $60.95Now: $55.00Was: $60.95 -
On Sale
ATHENA Complete Gasket Kit - Honda P400210850250
ATHENA
MSRP: $57.95Now: $52.00Was: $57.95A complete engine rebuild demands gasket integrity that won't compromise under sustained combustion pressures and extreme temperatures. The ATHENA Complete Gasket Kit delivers the precision sealing your Honda needs, whether you're freshening a stock...400210850250- SKU:
- 400210850250
- Availability:
- Ships Same Business Day
- Weight:
- 0.38 LBS
MSRP: $57.95Now: $52.00Was: $57.95Qty in Cart: 0Quantity:Price:MSRP: $57.95Now: $52.00Was: $57.95Subtotal: -
On Sale
ATHENA Complete Gasket Kit - Honda P400210850248
ATHENA
MSRP: $34.95Now: $31.00Was: $34.95A complete gasket kit is non-negotiable for any engine rebuild—it's your insurance policy against leaks, blow-by, and premature failure. The ATHENA P400210850248 delivers OEM-quality gasket sets engineered to handle sustained high RPM and elevated...400210850248- SKU:
- 400210850248
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
MSRP: $34.95Now: $31.00Was: $34.95 -
On Sale
ATHENA Complete Gasket Kit - Honda P400210850221
ATHENA
MSRP: $94.95Now: $85.00Was: $94.95A complete gasket kit is essential for any top-end rebuild or full engine overhaul—it ensures leak-free sealing across all critical surfaces and prevents catastrophic failures under high combustion pressures. The ATHENA P400210850221 delivers OEM-quality...400210850221- SKU:
- 400210850221
- Availability:
- Ships Same Business Day
- Weight:
- 0.44 LBS
MSRP: $94.95Now: $85.00Was: $94.95 -
On Sale
ATHENA Complete Gasket Kit - Honda P400210850214
ATHENA
MSRP: $73.95Now: $67.00Was: $73.95Whether you're rebuilding a tired engine or preparing for sustained high-RPM operation, gasket failure isn't an option. The ATHENA Complete Gasket Kit delivers the sealing integrity you need across all critical engine surfaces, with materials engineered...400210850214- SKU:
- 400210850214
- Availability:
- Ships Same Business Day
- Weight:
- 0.38 LBS
MSRP: $73.95Now: $67.00Was: $73.95 -
On Sale
ATHENA Complete Gasket Kit - Honda P400210850126
ATHENA
MSRP: $52.95Now: $48.00Was: $52.95A complete engine rebuild demands gasket materials engineered to handle extreme combustion pressures and temperature cycling without compromising sealing integrity. Athena's gasket kit eliminates the guesswork and sourcing headaches by bundling all...400210850126- SKU:
- 400210850126
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
MSRP: $52.95Now: $48.00Was: $52.95 -
On Sale
ATHENA Complete Gasket Kit - Honda P400210850103
ATHENA
MSRP: $41.95Now: $38.00Was: $41.95Engine gasket degradation leads to compression loss, coolant seepage, and oil leaks that compromise reliability and performance. The ATHENA Complete Gasket Kit delivers OEM-quality sealing across your entire top-end assembly with materials engineered to...400210850103- SKU:
- 400210850103
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
MSRP: $41.95Now: $38.00Was: $41.95Qty in Cart: 0Quantity:Price:MSRP: $41.95Now: $38.00Was: $41.95Subtotal: -
On Sale
ATHENA Complete Gasket Kit - Honda P400210850084
ATHENA
MSRP: $42.95Now: $39.00Was: $42.95A complete engine rebuild demands gasket integrity that won't fail under sustained load and elevated temperatures. Athena's Complete Gasket Kit delivers the precision sealing required for high-performance applications, with materials engineered to...400210850084- SKU:
- 400210850084
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
MSRP: $42.95Now: $39.00Was: $42.95 -
On Sale
ATHENA Top End Gasket Kit - Honda P400210600520
ATHENA
MSRP: $40.95Now: $37.00Was: $40.95Engine gasket integrity is critical when you're pushing your Honda to competition levels—worn or degraded seals compromise compression, throttle response, and reliability when it matters most. The ATHENA Top End Gasket Kit gives you the precision sealing...400210600520- SKU:
- 400210600520
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
MSRP: $40.95Now: $37.00Was: $40.95 -
On Sale
ATHENA Top End Gasket Kit - Honda P400210600505/1
ATHENA
MSRP: $94.95Now: $85.00Was: $94.95Pre-race engine freshening demands precision gasket materials that won't compromise your compression ratio or reliability when you're chasing a podium finish. The ATHENA Top End Gasket Kit gives you the flexibility to run your engine optimized for either...400210600505- SKU:
- 400210600505
- Availability:
- Ships Same Business Day
- Weight:
- 0.38 LBS
MSRP: $94.95Now: $85.00Was: $94.95Qty in Cart: 0Quantity:Price:MSRP: $94.95Now: $85.00Was: $94.95Subtotal:
