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 - CR250R 810250
MOOSE RACING
$23.33A top-end rebuild demands precision—gasket failure compromises compression, causes oil weeping, and tanks performance. The MOOSE RACING Top End Gasket Kit delivers OEM-quality seals at a fraction of...M810250- SKU:
- M810250
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- KIT
$23.33Qty in Cart: 0Quantity:Price:$23.33Subtotal: -
On Sale
ATHENA Top End Gasket Kit - Yamaha P400485600213
ATHENA
MSRP: $61.95Now: $56.00Was: $61.95A top-end gasket kit is essential maintenance for any racer looking to maximize engine reliability between rebuilds. The ATHENA P400485600213 gives you the flexibility to run either pump gas with...09346470- SKU:
- 09346470
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- TOP END
MSRP: $61.95Now: $56.00Was: $61.95Qty in Cart: 0Quantity:Price:MSRP: $61.95Now: $56.00Was: $61.95Subtotal: -
On Sale
ATHENA Water Pump Gasket Kit - Honda P400210475008
ATHENA
MSRP: $29.95Now: $25.00Was: $29.95Proper coolant sealing is non-negotiable in high-performance applications—a failed water pump gasket can lead to catastrophic overheating and engine damage. The ATHENA Water Pump Gasket Kit delivers...09346044- SKU:
- 09346044
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- WATER PUMP
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
MSRP: $29.95Now: $25.00Was: $29.95 -
On Sale
ATHENA Water Pump Gasket Kit - Suzuki P400510475001
ATHENA
MSRP: $34.95Now: $31.00Was: $34.95Include water pump gasket, clutch cover gasket, water pump shaft oil seals and washers, Kit contents will vary slightly based on application, Kits do not contain replacement bearings09346080- SKU:
- 09346080
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- TYPE:
- WATER PUMP
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- GASKET KIT
MSRP: $34.95Now: $31.00Was: $34.95Qty in Cart: 0Quantity:Price:MSRP: $34.95Now: $31.00Was: $34.95Subtotal: -
On Sale
ATHENA Water Pump Gasket Kit - Yamaha P400485475007
ATHENA
MSRP: $39.95Now: $34.00Was: $39.95Include water pump gasket, clutch cover gasket, water pump shaft oil seals and washers, Kit contents will vary slightly based on application, Kits do not contain replacement bearings09346089- SKU:
- 09346089
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP
- UNITS:
- KIT
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- GASKET KIT
MSRP: $39.95Now: $34.00Was: $39.95 -
On Sale
ATHENA Water Pump Gasket Kit - Yamaha P400485475009
ATHENA
MSRP: $41.95Now: $36.00Was: $41.95Include water pump gasket, clutch cover gasket, water pump shaft oil seals and washers, Kit contents will vary slightly based on application, Kits do not contain replacement bearings09346091- SKU:
- 09346091
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- TYPE:
- WATER PUMP
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
MSRP: $41.95Now: $36.00Was: $41.95 -
On Sale
ATHENA Water Pump Gasket Kit - Yamaha P400485475010
ATHENA
MSRP: $39.95Now: $36.00Was: $39.95Include water pump gasket, clutch cover gasket, water pump shaft oil seals and washers, Kit contents will vary slightly based on application, Kits do not contain replacement bearings09346092- SKU:
- 09346092
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- TYPE:
- WATER PUMP
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
MSRP: $39.95Now: $36.00Was: $39.95Qty in Cart: 0Quantity:Price:MSRP: $39.95Now: $36.00Was: $39.95Subtotal: -
On Sale
ATHENA Complete Gasket Kit - Kawasaki/Suzuki P400250850016
ATHENA
MSRP: $132.95Now: $120.00Was: $132.95Superior-quality gasket sets from Athena, Head gaskets feature rubber-coated spring steel construction, Soft steel base gaskets are rubber coated, Steel core materials feature high springback and...09340352- SKU:
- 09340352
- Availability:
- Ships Same Business Day
- Weight:
- 0.28 LBS
- ENGINE TYPE:
- -
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
MSRP: $132.95Now: $120.00Was: $132.95Qty in Cart: 0Quantity:Price:MSRP: $132.95Now: $120.00Was: $132.95Subtotal: -
On Sale
ATHENA Gasket Kit - KX250F/RMZ250 P400510160004
ATHENA
MSRP: $104.95Now: $94.00Was: $104.95Kits include aluminum cylinder with nickel-carbide coating designed with larger water jackets, Forged piston with molybdenum coating, Special gasket kit, Easy-to-follow step-by-step installation...09340359- SKU:
- 09340359
- Availability:
- Ships Same Business Day
- Weight:
- 0.12 LBS
- BORE SIZE:
- 83,00 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- BORE SIZE METRIC:
- 83.00 MM
- TYPE:
- TOP END
MSRP: $104.95Now: $94.00Was: $104.95Qty in Cart: 0Quantity:Price:MSRP: $104.95Now: $94.00Was: $104.95Subtotal: -
On Sale
ATHENA Complete Gasket Kit - KTM P400270850220/1
ATHENA
MSRP: $91.95Now: $83.00Was: $91.95Superior-quality gasket sets from Athena, Head gaskets feature rubber-coated spring steel construction, Soft steel base gaskets are rubber coated, Steel core materials feature high springback and...09340221- SKU:
- 09340221
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET KIT
MSRP: $91.95Now: $83.00Was: $91.95Qty in Cart: 0Quantity:Price:MSRP: $91.95Now: $83.00Was: $91.95Subtotal: -
On Sale
ATHENA Top End Gasket Kit - Husqvarna P400220600252
ATHENA
MSRP: $67.95Now: $58.00Was: $67.95Specifically designed for the pro, semi-pro and amateur rider who freshens up their engine prior to a race or during midseason. Gives the rider a choice of using standard gas with stock compression,...09341789- SKU:
- 09341789
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- TYPE:
- TOP END
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- GASKET KIT
MSRP: $67.95Now: $58.00Was: $67.95 -
On Sale
ATHENA Top End Gasket Kit - Honda P400210600207
ATHENA
MSRP: $67.95Now: $61.00Was: $67.95Specifically designed for the pro, semi-pro and amateur rider who freshens up their engine prior to a race or during midseason. Gives the rider a choice of using standard gas with stock compression,...09341969- SKU:
- 09341969
- Availability:
- Ships Same Business Day
- Weight:
- 0.18 LBS
- PRODUCT NAME:
- GASKET KIT
- MATERIAL:
- RUBBER
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- KIT
MSRP: $67.95Now: $61.00Was: $67.95Qty in Cart: 0Quantity:Price:MSRP: $67.95Now: $61.00Was: $67.95Subtotal: -
On Sale
ATHENA Top End Gasket Kit - Honda P400210600192
ATHENA
MSRP: $54.95Now: $49.00Was: $54.95Specifically designed for the pro, semi-pro and amateur rider who freshens up their engine prior to a race or during midseason. Gives the rider a choice of using standard gas with stock compression,...09341972- SKU:
- 09341972
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- TYPE:
- TOP END
- UNITS:
- KIT
- MATERIAL:
- RUBBER
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- GASKET KIT
MSRP: $54.95Now: $49.00Was: $54.95Qty in Cart: 0Quantity:Price:MSRP: $54.95Now: $49.00Was: $54.95Subtotal: -
On Sale
ATHENA Complete Gasket Kit - Kawasaki P400250850047
ATHENA
MSRP: $204.95Now: $184.00Was: $204.95Superior-quality gasket sets from Athena, Head gaskets feature rubber-coated spring steel construction, Soft steel base gaskets are rubber coated, Steel core materials feature high springback and...09341997- SKU:
- 09341997
- Availability:
- Ships Same Business Day
- Weight:
- 0.41 LBS
- ENGINE TYPE:
- -
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- PRODUCT NAME:
- GASKET KIT
MSRP: $204.95Now: $184.00Was: $204.95Qty in Cart: 0Quantity:Price:MSRP: $204.95Now: $184.00Was: $204.95Subtotal: -
On Sale
ATHENA Race Gasket Kit - YZ 125 R4856-118
ATHENA
MSRP: $19.95Now: $17.00Was: $19.95Specifically designed for the pro, semi-pro and amateur rider who freshens up their engine prior to a race or during mid-season, Kits include a top-of-the line MLSS head gasket and two or more...09342840- SKU:
- 09342840
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- STYLE:
- RACE
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET KIT
- MATERIAL:
- RUBBER
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
MSRP: $19.95Now: $17.00Was: $19.95 -
On Sale
ATHENA Race Gasket Kit - YZ80/85 R4856-089
ATHENA
MSRP: $18.95Now: $17.00Was: $18.95Specifically designed for the pro, semi-pro and amateur rider who freshens up their engine prior to a race or during mid-season, Kits include a top-of-the line MLSS head gasket and two or more...09342843- SKU:
- 09342843
- Availability:
- Ships Same Business Day
- Weight:
- 0.14 LBS
- MATERIAL:
- RUBBER
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- GASKET KIT
- STYLE:
- RACE
- UNITS:
- KIT
- TYPE:
- TOP END
MSRP: $18.95Now: $17.00Was: $18.95Qty in Cart: 0Quantity:Price:MSRP: $18.95Now: $17.00Was: $18.95Subtotal: -
On Sale
ATHENA Gasket Kit P400270160059
ATHENA
MSRP: $68.95Now: $62.00Was: $68.95Kits include aluminum cylinder with nickel-carbide coating designed with larger water jackets, Forged piston with molybdenum coating, Special gasket kit, Easy-to-follow step-by-step installation...09342898- SKU:
- 09342898
- Availability:
- Ships Same Business Day
- Weight:
- 0.17 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- KIT
- DISPLACEMENT:
- 277 CC
- BORE SIZE:
- 80,00 MM
- BORE SIZE METRIC:
- 80.00 MM
- PRODUCT NAME:
- GASKET KIT
MSRP: $68.95Now: $62.00Was: $68.95Qty in Cart: 0Quantity:Price:MSRP: $68.95Now: $62.00Was: $68.95Subtotal: -
On Sale
ATHENA Complete Gasket Kit - Kawasaki P400250900065
ATHENA
MSRP: $131.95Now: $119.00Was: $131.95Superior-quality gasket sets from Athena, Head gaskets feature rubber-coated spring steel construction, Soft steel base gaskets are rubber coated, Steel core materials feature high springback and...09343165- SKU:
- 09343165
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- UNITS:
- KIT
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
MSRP: $131.95Now: $119.00Was: $131.95Qty in Cart: 0Quantity:Price:MSRP: $131.95Now: $119.00Was: $131.95Subtotal: -
On Sale
ATHENA Top End Gasket Kit - Yamaha P400485600188
ATHENA
MSRP: $71.95Now: $65.00Was: $71.95Specifically designed for the pro, semi-pro and amateur rider who freshens up their engine prior to a race or during midseason. Gives the rider a choice of using standard gas with stock compression,...09343173- SKU:
- 09343173
- Availability:
- Ships Same Business Day
- Weight:
- 0.23 LBS
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- KIT
MSRP: $71.95Now: $65.00Was: $71.95Qty in Cart: 0Quantity:Price:MSRP: $71.95Now: $65.00Was: $71.95Subtotal: -
On Sale
ATHENA Top End Gasket Kit P400250600015
ATHENA
MSRP: $36.95Now: $31.00Was: $36.95Specifically designed for the pro, semi-pro and amateur rider who freshens up their engine prior to a race or during midseason. Gives the rider a choice of using standard gas with stock compression,...09340205- SKU:
- 09340205
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- MATERIAL:
- RUBBER
- UNITS:
- KIT
- TYPE:
- TOP END
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
MSRP: $36.95Now: $31.00Was: $36.95
