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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COMETIC Bottom End Gasket Set - Honda C3047BE
COMETIC
$114.95A proper bottom end gasket set is non-negotiable when you're rebuilding an engine—using OEM-equivalent seals ensures oil containment, prevents coolant leaks, and maintains compression integrity from day one. COMETIC's engineered gasket kit takes the...09344079- SKU:
- 09344079
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- BOTTOM END
- BORE SIZE METRIC:
- 99.00 MM
- MODEL:
- HI-PERFORMANCE
- UNITS:
- KIT
$114.95Qty in Cart: 0Quantity:Price:$114.95Subtotal: -
BOYESEN Ignition Gasket Cover - KTM SCG-40A
BOYESEN
$5.95Factory-grade ignition covers aren't just about aesthetics—they're essential protection for your engine's internals against dirt, moisture, and debris that can compromise performance and longevity. The Boyesen SCG-40A delivers the durability and sealing...09343123- SKU:
- 09343123
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- TYPE:
- IGNITION COVER
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- MATERIAL:
- NITRILE RUBBER
- MODEL:
- FACTORY RACING
- UNITS:
- EACH
$5.95Qty in Cart: 0Quantity:Price:$5.95Subtotal: -
COMETIC Exhaust Gasket - Honda C7126EX
COMETIC
$11.95Exhaust gasket failure means catastrophic air leaks, lost power, and potential engine damage—and you can't trust a subpar seal at high temperatures or high boost. The COMETIC C7126EX is engineered to withstand extreme conditions with double-sided Viton®...09344236- SKU:
- 09344236
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- BORE SIZE METRIC:
- 51.00 MM
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- GASKET
- MODEL:
- HI-PERFORMANCE
- TYPE:
- EXHAUST
- UNITS:
- SET
$11.95Qty in Cart: 0Quantity:Price:$11.95Subtotal: -
COMETIC Bottom End Gasket Set - Honda C7191BE
COMETIC
$82.95A complete bottom end gasket set is essential when you're rebuilding your engine—skimping on gasket quality invites oil leaks, coolant seepage, and catastrophic internal failures down the line. COMETIC's C7191BE delivers OEM-correct sealing surfaces with...09344252- SKU:
- 09344252
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- BORE SIZE METRIC:
- 68.50 MM
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- BOTTOM END
- BORE SIZE METRIC:
- 66.50 MM
- MODEL:
- HI-PERFORMANCE
- UNITS:
- KIT
$82.95Qty in Cart: 0Quantity:Price:$82.95Subtotal: -
COMETIC Stator Gasket - Suzuki EC1019032AFM
COMETIC
$13.95Stator cover gaskets are a wear item that directly impact engine reliability and maintenance efficiency. The COMETIC EC1019032AFM eliminates the frustration of stuck gaskets and failed seals with its AFM material construction—no scraping, no sealants,...09344363- SKU:
- 09344363
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- STATOR COVER
- MODEL:
- HI-PERFORMANCE
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- PRODUCT NAME:
- GASKET
- UNITS:
- EACH
$13.95 -
COMETIC Top End Gasket Set - Gas Gas C3261
COMETIC
$56.95A failed top-end gasket will strand you on the track or trail, compromising compression and power when you need it most. The COMETIC C3261 Top End Gasket Set delivers the sealing integrity demanded by modern 4-stroke engines running high boost or...09344128- SKU:
- 09344128
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- KIT
$56.95Qty in Cart: 0Quantity:Price:$56.95Subtotal: -
VESRAH Top End Gasket Kit - Kawasaki 100 VG-843
VESRAH
$15.11A top-end rebuild demands precision gaskets that seal reliably under high RPM and combustion pressures—VESRAH's OEM-quality gasket kit eliminates guesswork and potential leaks. This complete set includes every gasket, o-ring, and valve guide oil seal...VG843- SKU:
- VG843
- Availability:
- Ships Same Business Day
- Weight:
- 0.36 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- SET
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
$15.11Qty in Cart: 0Quantity:Price:$15.11Subtotal: -
COMETIC Top End Gasket Set - XR650 C3216
COMETIC
$40.95A quality gasket set is non-negotiable for top-end reliability, especially on high-output engines where combustion pressures demand precise sealing. The COMETIC C3216 is engineered specifically for the XR650, combining multi-layered steel construction...C7151- SKU:
- C7151
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- PRODUCT NAME:
- GASKET KIT
- BORE SIZE METRIC:
- 102.50 MM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- TYPE:
- TOP END
- UNITS:
- KIT
$40.95Qty in Cart: 0Quantity:Price:$40.95Subtotal: -
COMETIC Top End Gasket Set - Suzuki C7136
COMETIC
$40.95A failing head gasket compromises combustion sealing and bleeds horsepower—especially under boost or high cylinder pressures. The COMETIC C7136 Top End Gasket Set delivers multi-layered steel construction with Viton rubber coating to maintain consistent...C7136- SKU:
- C7136
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$40.95 -
COMETIC Top End Gasket Set - Suzuki C7054
COMETIC
$28.95A quality top end gasket set is non-negotiable for any engine rebuild or head service—failed seals mean oil leaks, compression loss, and potential catastrophic damage. The COMETIC C7054 delivers the sealing integrity and thermal management you need,...C7054- SKU:
- C7054
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- TOP END
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$28.95Qty in Cart: 0Quantity:Price:$28.95Subtotal: -
COMETIC Top End Gasket Set - Kawasaki C6043
COMETIC
$51.95A complete top-end gasket failure can sideline your engine and derail your race schedule. COMETIC's C6043 gasket set delivers the reliability you need for consistent performance, whether you're running stock power or pushing boost through forced...C6043- SKU:
- C6043
- Availability:
- Ships Same Business Day
- Weight:
- 0.38 LBS
- MODEL:
- HI-PERFORMANCE
- UNITS:
- KIT
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- TOP END
- DISPLACEMENT:
- 750 CC
- PRODUCT NAME:
- GASKET KIT
$51.95Qty in Cart: 0Quantity:Price:$51.95Subtotal: -
On Sale
ATHENA Complete Gasket Kit - Suzuki P400510850261
ATHENA
MSRP: $35.95Now: $32.00Was: $35.95A complete gasket kit is essential for any top-end rebuild or full engine overhaul—it ensures reliable sealing across all critical interfaces and prevents fluid leaks that compromise performance and engine longevity. Athena's engineering combines proven...400510850261- SKU:
- 400510850261
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
MSRP: $35.95Now: $32.00Was: $35.95Qty in Cart: 0Quantity:Price:MSRP: $35.95Now: $32.00Was: $35.95Subtotal: -
On Sale
ATHENA Complete Gasket Kit - Suzuki P400510850252
ATHENA
MSRP: $69.95Now: $63.00Was: $69.95A complete gasket kit is essential for any top-end or full engine rebuild—sealing failures lead to compression loss, oil leakage, and catastrophic engine damage. Athena's engineering prioritizes high-temperature durability and reliable sealing under...400510850252- SKU:
- 400510850252
- Availability:
- Ships Same Business Day
- Weight:
- 4.00 LBS
MSRP: $69.95Now: $63.00Was: $69.95Qty in Cart: 0Quantity:Price:MSRP: $69.95Now: $63.00Was: $69.95Subtotal: -
On Sale
ATHENA Complete Gasket Kit - Suzuki P400510850241
ATHENA
MSRP: $74.95Now: $67.00Was: $74.95A complete engine gasket kit is essential for any top-end rebuild or full engine overhaul, and the ATHENA P400510850241 delivers the reliability needed for sustained high-performance operation. Athena's rubber-coated steel construction and...400510850241- SKU:
- 400510850241
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
MSRP: $74.95Now: $67.00Was: $74.95Qty in Cart: 0Quantity:Price:MSRP: $74.95Now: $67.00Was: $74.95Subtotal: -
On Sale
ATHENA Complete Gasket Kit - Suzuki P400510850125
ATHENA
MSRP: $40.95Now: $37.00Was: $40.95A complete gasket kit is essential when rebuilding your engine—using OEM-quality seals ensures reliable compression, prevents fluid leakage, and maintains peak performance across all operating conditions. The Athena P400510850125 combines precision...400510850125- SKU:
- 400510850125
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
MSRP: $40.95Now: $37.00Was: $40.95 -
On Sale
ATHENA Top End Gasket Kit - Suzuki P400510600143
ATHENA
MSRP: $30.95Now: $28.00Was: $30.95A top-end gasket kit is essential maintenance for any racer looking to maximize engine reliability and performance between rebuild cycles. The ATHENA P400510600143 gives you the flexibility to run either pump gas at stock compression or switch to race...400510600143- SKU:
- 400510600143
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
MSRP: $30.95Now: $28.00Was: $30.95 -
On Sale
ATHENA Top End Gasket Kit - Suzuki P400510600013
ATHENA
MSRP: $10.95Now: $10.00Was: $10.95Engine gasket integrity is critical when you're preparing for race season—a single leak can cost you lap time and reliability when it matters most. The ATHENA Top End Gasket Kit gives you the flexibility to run either pump gas with stock compression or...4.00511E+11- SKU:
- 4.00511E+11
- Availability:
- Ships Same Business Day
- Weight:
- 0.00 LBS
MSRP: $10.95Now: $10.00Was: $10.95 -
On Sale
ATHENA Complete Gasket Kit - Yamaha P400485850490
ATHENA
MSRP: $34.95Now: $31.00Was: $34.95When you're rebuilding an engine, gasket failure isn't an option—it's a catastrophe. The ATHENA Complete Gasket Kit delivers the reliability you need across all critical sealing points, combining high-temperature materials with precision engineering to...400485850490- SKU:
- 400485850490
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
MSRP: $34.95Now: $31.00Was: $34.95Qty in Cart: 0Quantity:Price:MSRP: $34.95Now: $31.00Was: $34.95Subtotal: -
On Sale
ATHENA Complete Gasket Kit - Yamaha P400485850254
ATHENA
MSRP: $46.95Now: $42.00Was: $46.95A complete engine rebuild demands gasket integrity you can depend on—Athena's engineering ensures reliable seals across all operating conditions without compromise. This kit provides everything needed for top-end and full-engine rebuilds, eliminating the...400485850254- SKU:
- 400485850254
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
MSRP: $46.95Now: $42.00Was: $46.95Qty in Cart: 0Quantity:Price:MSRP: $46.95Now: $42.00Was: $46.95Subtotal: -
On Sale
ATHENA Complete Gasket Kit - Yamaha P400485850124
ATHENA
MSRP: $31.95Now: $29.00Was: $31.95A failed gasket compromise engine reliability and performance—especially under high-temperature, high-load conditions. The ATHENA Complete Gasket Kit delivers OEM-quality sealing across your entire top-end with engineered materials designed to maintain...400485850124- SKU:
- 400485850124
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
MSRP: $31.95Now: $29.00Was: $31.95
