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
-
On Sale
ATHENA Top End Gasket Kit - Honda P400210600319
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, or race gas with a higher compression. Kits do not...09346346- SKU:
- 09346346
- Availability:
- Ships Same Business Day
- Weight:
- 0.26 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- KIT
MSRP: $67.95Now: $61.00Was: $67.95 -
On Sale
ATHENA Complete Gasket Kit - Honda P400210900319
ATHENA
MSRP: $198.95Now: $179.00Was: $198.95Head gaskets feature rubber-coated spring steel construction, Soft steel base gaskets are rubber coated, Steel core materials feature high spring-back and superior tensile strength, Revolutionary transparent coating guarantees a perfect seal even at...09346347- SKU:
- 09346347
- Availability:
- Ships Same Business Day
- Weight:
- 0.56 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
MSRP: $198.95Now: $179.00Was: $198.95 -
On Sale
ATHENA Top End Gasket Kit - Honda P400210600320
ATHENA
MSRP: $82.95Now: $75.00Was: $82.95Specifically 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, or race gas with a higher compression. Kits do not...09346348- SKU:
- 09346348
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 LBS
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
MSRP: $82.95Now: $75.00Was: $82.95Qty in Cart: 0Quantity:Price:MSRP: $82.95Now: $75.00Was: $82.95Subtotal: -
On Sale
ATHENA Complete Gasket Kit - Yamaha P400485900198
ATHENA
MSRP: $103.90Now: $89.00Was: $103.90Head gaskets feature rubber-coated spring steel construction, Soft steel base gaskets are rubber coated, Steel core materials feature high spring-back and superior tensile strength, Revolutionary transparent coating guarantees a perfect seal even at...09346358- SKU:
- 09346358
- Availability:
- Ships Same Business Day
- Weight:
- 0.36 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
MSRP: $103.90Now: $89.00Was: $103.90Qty in Cart: 0Quantity:Price:MSRP: $103.90Now: $89.00Was: $103.90Subtotal: -
On Sale
ATHENA Top End Gasket Kit - Yamaha P400485600199
ATHENA
MSRP: $31.95Now: $29.00Was: $31.95Specifically 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, or race gas with a higher compression. Kits do not...09346359- SKU:
- 09346359
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
MSRP: $31.95Now: $29.00Was: $31.95 -
On Sale
ATHENA Complete Gasket Kit - Yamaha P400485900199
ATHENA
MSRP: $98.95Now: $89.00Was: $98.95Head gaskets feature rubber-coated spring steel construction, Soft steel base gaskets are rubber coated, Steel core materials feature high spring-back and superior tensile strength, Revolutionary transparent coating guarantees a perfect seal even at...09346360- SKU:
- 09346360
- Availability:
- Ships Same Business Day
- Weight:
- 0.36 LBS
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- COMPLETE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
MSRP: $98.95Now: $89.00Was: $98.95 -
On Sale
ATHENA Top End Gasket Kit - Yamaha P400485600212
ATHENA
MSRP: $72.95Now: $66.00Was: $72.95Specifically 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, or race gas with a higher compression. Kits do not...09346361- SKU:
- 09346361
- Availability:
- Ships Same Business Day
- Weight:
- 0.26 LBS
- TYPE:
- TOP END
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- GASKET KIT
MSRP: $72.95Now: $66.00Was: $72.95 -
On Sale
ATHENA Complete Gasket Kit - Yamaha P400485900212
ATHENA
MSRP: $183.95Now: $166.00Was: $183.95Head gaskets feature rubber-coated spring steel construction, Soft steel base gaskets are rubber coated, Steel core materials feature high spring-back and superior tensile strength, Revolutionary transparent coating guarantees a perfect seal even at...09346362- SKU:
- 09346362
- Availability:
- Ships Same Business Day
- Weight:
- 0.41 LBS
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
MSRP: $183.95Now: $166.00Was: $183.95 -
On Sale
ATHENA Race Gasket Kit - Honda R2106-319
ATHENA
MSRP: $70.95Now: $64.00Was: $70.95Specifically 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 premium-quality base gaskets of different thicknesses to...09346365- SKU:
- 09346365
- Availability:
- Ships Same Business Day
- Weight:
- 0.51 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET KIT
- STYLE:
- RACE
MSRP: $70.95Now: $64.00Was: $70.95 -
On Sale
ATHENA Race Gasket Kit - KTM/Husqvarna R2706-090
ATHENA
MSRP: $66.95Now: $60.00Was: $66.95Specifically 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 premium-quality base gaskets of different thicknesses to...09346367- SKU:
- 09346367
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- STYLE:
- RACE
- TYPE:
- TOP END
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- GASKET KIT
MSRP: $66.95Now: $60.00Was: $66.95Qty in Cart: 0Quantity:Price:MSRP: $66.95Now: $60.00Was: $66.95Subtotal: -
On Sale
ATHENA Race Gasket Kit - Yamaha R4856-198
ATHENA
MSRP: $25.95Now: $23.00Was: $25.95Specifically 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 premium-quality base gaskets of different thicknesses to...09346369- SKU:
- 09346369
- Availability:
- Ships Same Business Day
- Weight:
- 0.51 LBS
- PRODUCT NAME:
- GASKET KIT
- STYLE:
- RACE
- TYPE:
- TOP END
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
MSRP: $25.95Now: $23.00Was: $25.95 -
On Sale
ATHENA Race Gasket Kit - Yamaha R4856-212
ATHENA
MSRP: $72.95Now: $66.00Was: $72.95Specifically 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 premium-quality base gaskets of different thicknesses to...09346371- SKU:
- 09346371
- Availability:
- Ships Same Business Day
- Weight:
- 0.51 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- STYLE:
- RACE
- UNITS:
- KIT
MSRP: $72.95Now: $66.00Was: $72.95Qty in Cart: 0Quantity:Price:MSRP: $72.95Now: $66.00Was: $72.95Subtotal: -
On Sale
ATHENA Water Pump Gasket Kit - Honda P400210475014
ATHENA
MSRP: $28.95Now: $26.00Was: $28.95Include 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 bearings09346373- SKU:
- 09346373
- Availability:
- Ships Same Business Day
- Weight:
- 0.56 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
MSRP: $28.95Now: $26.00Was: $28.95Qty in Cart: 0Quantity:Price:MSRP: $28.95Now: $26.00Was: $28.95Subtotal: -
On Sale
ATHENA Water Pump Gasket Kit - Yamaha P400485475012
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 bearings09346375- SKU:
- 09346375
- Availability:
- Ships Same Business Day
- Weight:
- 0.41 LBS
- TYPE:
- WATER PUMP
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- GASKET KIT
MSRP: $39.95Now: $36.00Was: $39.95 -
On Sale
ATHENA Water Pump Gasket Kit - Yamaha P400485475013
ATHENA
MSRP: $37.95Now: $34.00Was: $37.95Include 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 bearings09346376- SKU:
- 09346376
- Availability:
- Ships Same Business Day
- Weight:
- 0.36 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
MSRP: $37.95Now: $34.00Was: $37.95 -
On Sale
ATHENA Water Pump Gasket Kit - Kawasaki P400250475016
ATHENA
MSRP: $69.95Now: $63.00Was: $69.95Include 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 bearings09346378- SKU:
- 09346378
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 LBS
- TYPE:
- WATER PUMP
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
MSRP: $69.95Now: $63.00Was: $69.95 -
On Sale
ATHENA Water Pump Gasket Kit - KTM/Husqvarna P400270475019
ATHENA
MSRP: $49.95Now: $45.00Was: $49.95Include 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 bearings09346380- SKU:
- 09346380
- Availability:
- Ships Same Business Day
- Weight:
- 0.56 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- WATER PUMP
MSRP: $49.95Now: $45.00Was: $49.95Qty in Cart: 0Quantity:Price:MSRP: $49.95Now: $45.00Was: $49.95Subtotal: -
On Sale
ATHENA Water Pump Gasket Kit - KTM/Husqvarna P400270475020
ATHENA
MSRP: $61.95Now: $56.00Was: $61.95Include 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 bearings09346381- SKU:
- 09346381
- Availability:
- Ships Same Business Day
- Weight:
- 0.41 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP
- UNITS:
- KIT
MSRP: $61.95Now: $56.00Was: $61.95 -
On Sale
ATHENA Top End Gasket Kit - KTM P400270600092
ATHENA
MSRP: $73.95Now: $67.00Was: $73.95Specifically 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, or race gas with a higher compression. Kits do not...09346460- SKU:
- 09346460
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- TYPE:
- TOP END
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET KIT
MSRP: $73.95Now: $67.00Was: $73.95 -
MOOSE RACING Top End Gasket Kit - KX 500 810470
MOOSE RACING
$43.80Moose can now handle all your gasket and seal needs at a fraction of OEM cost, High-tech materials provide unmatched reliability and performance, Rebuild the engine and transmission with total confidence as each set is designed for durability and...M810470- SKU:
- M810470
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- KIT
$43.80
