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 Top End Gasket Set - Honda C7020
COMETIC
$51.95Top end gasket kits include correct base, head gasket and cylinder O-rings as well as other top end specific O-rings or seals needed for R&R of top end, MLS head gaskets promote an even torque load across the gasket sealing surface, providing less bore...C7020- SKU:
- C7020
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- THICKNESS IMPERIAL:
- 0,012'
- TYPE:
- TOP END
- BORE SIZE METRIC:
- 91.00 MM
- PRODUCT NAME:
- GASKET KIT
- THICKNESS METRIC:
- 0.31 MM
$51.95 -
ATHENA Complete Gasket Kit - Suzuki P400510850126
ATHENA
$44.95Superior-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 superior tensile strength, Revolutionary transparent...400510850126- SKU:
- 400510850126
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
$44.95 -
ATHENA Complete Gasket Kit - Suzuki P400510850082
ATHENA
$32.95Superior-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 superior tensile strength, Revolutionary transparent...400510850082- SKU:
- 400510850082
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
$32.95Qty in Cart: 0Quantity:Price:$32.95Subtotal: -
ATHENA Complete Gasket Kit - Suzuki P400510850031
ATHENA
$86.95Superior-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 superior tensile strength, Revolutionary transparent...400510850031- SKU:
- 400510850031
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
$86.95 -
ATHENA Complete Gasket Kit - Suzuki P400510850030
ATHENA
$74.95Superior-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 superior tensile strength, Revolutionary transparent...400510850030- SKU:
- 400510850030
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
$74.95 -
ATHENA Top End Gasket Kit - Suzuki P400510600124
ATHENA
$20.95Specifically 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...400510600124- SKU:
- 400510600124
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
$20.95 -
ATHENA Complete Gasket Kit - Yamaha P400485850491
ATHENA
$34.95Superior-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 superior tensile strength, Revolutionary transparent...400485850491- SKU:
- 400485850491
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
$34.95Qty in Cart: 0Quantity:Price:$34.95Subtotal: -
ATHENA Complete Gasket Kit - Yamaha P400485850270
ATHENA
$42.95Superior-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 superior tensile strength, Revolutionary transparent...400485850270- SKU:
- 400485850270
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
$42.95 -
ATHENA Complete Gasket Kit - Yamaha P400485850267
ATHENA
$53.95Superior-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 superior tensile strength, Revolutionary transparent...400485850267- SKU:
- 400485850267
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
$53.95 -
ATHENA Complete Gasket Kit - Yamaha P400485850253/1
ATHENA
$38.95Superior-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 superior tensile strength, Revolutionary transparent...400485850253- SKU:
- 400485850253
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
$38.95 -
ATHENA Complete Gasket Kit - Yamaha P400485850251
ATHENA
$38.95Superior-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 superior tensile strength, Revolutionary transparent...400485850251- SKU:
- 400485850251
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
$38.95 -
ATHENA Complete Gasket Kit - Yamaha P400485850125
ATHENA
$47.95Superior-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 superior tensile strength, Revolutionary transparent...400485850125- SKU:
- 400485850125
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
$47.95 -
ATHENA Complete Gasket Kit - Yamaha P400485850116
ATHENA
$46.95Superior-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 superior tensile strength, Revolutionary transparent...400485850116- SKU:
- 400485850116
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
$46.95 -
ATHENA Complete Gasket Kit - Yamaha P400485850089
ATHENA
$34.95Superior-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 superior tensile strength, Revolutionary transparent...400485850089- SKU:
- 400485850089
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
$34.95 -
ATHENA Complete Gasket Kit - Yamaha P400485850004
ATHENA
$16.95Superior-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 superior tensile strength, Revolutionary transparent...400485850004- SKU:
- 400485850004
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
$16.95 -
ATHENA Top End Gasket Kit - Yamaha P400485600267
ATHENA
$33.95Specifically 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...400485600267- SKU:
- 400485600267
- Availability:
- Ships Same Business Day
- Weight:
- 0.12 LBS
$33.95 -
ATHENA Top End Gasket Kit - Yamaha P400485600254
ATHENA
$33.95Specifically 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...400485600254- SKU:
- 400485600254
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
$33.95 -
ATHENA Top End Gasket Kit - Yamaha P400485600133
ATHENA
$11.95Specifically 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...400485600133- SKU:
- 400485600133
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
$11.95 -
ATHENA Top End Gasket Kit - Yamaha P400485600116
ATHENA
$26.95Specifically 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...400485600116- SKU:
- 400485600116
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
$26.95 -
ATHENA Complete Gasket Kit - Kawasaki P400250850500
ATHENA
$57.95Superior-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 superior tensile strength, Revolutionary transparent...400250850500- SKU:
- 400250850500
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
$57.95
