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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ATHENA Complete Gasket Kit - Kawasaki P400250850252/1
ATHENA
$58.95Superior-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...400250850252- SKU:
- 400250850252
- Availability:
- Ships Same Business Day
- Weight:
- 4.00 LBS
$58.95 -
ATHENA Complete Gasket Kit - Kawasaki P400250850251
ATHENA
$68.95Superior-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...400250850251- SKU:
- 400250850251
- Availability:
- Ships Same Business Day
- Weight:
- 4.00 LBS
$68.95 -
ATHENA Complete Gasket Kit - Kawasaki P400250850136
ATHENA
$50.95Superior-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...400250850136- SKU:
- 400250850136
- Availability:
- Ships Same Business Day
- Weight:
- 4.00 LBS
$50.95Qty in Cart: 0Quantity:Price:$50.95Subtotal: -
ATHENA Complete Gasket Kit - Kawasaki P400250850104
ATHENA
$58.95Superior-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...400250850104- SKU:
- 400250850104
- Availability:
- Ships Same Business Day
- Weight:
- 4.00 LBS
$58.95 -
ATHENA Complete Gasket Kit - Kawasaki P400250850089
ATHENA
$58.95Superior-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...400250850089- SKU:
- 400250850089
- Availability:
- Ships Same Business Day
- Weight:
- 3.00 LBS
$58.95 -
ATHENA Complete Gasket Kit - Kawasaki P400250850088/1
ATHENA
$23.95Superior-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...400250850088- SKU:
- 400250850088
- Availability:
- Ships Same Business Day
- Weight:
- 3.00 LBS
$23.95 -
ATHENA Complete Gasket Kit - Kawasaki P400250850009
ATHENA
$80.95Superior-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...400250850009- SKU:
- 400250850009
- Availability:
- Ships Same Business Day
- Weight:
- 4.00 LBS
$80.95 -
ATHENA Complete Gasket Kit - Kawasaki P400250850008
ATHENA
$55.95Superior-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...400250850008- SKU:
- 400250850008
- Availability:
- Ships Same Business Day
- Weight:
- 2.00 LBS
$55.95Qty in Cart: 0Quantity:Price:$55.95Subtotal: -
ATHENA Top End Gasket Kit - Kawasaki P400250600500
ATHENA
$40.95Specifically 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...400250600500- SKU:
- 400250600500
- Availability:
- Ships Same Business Day
- Weight:
- 3.00 LBS
$40.95 -
ATHENA Top End Gasket Kit - Kawasaki P400250600252
ATHENA
$40.95Specifically 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...400250600252- SKU:
- 400250600252
- Availability:
- Ships Same Business Day
- Weight:
- 3.00 LBS
$40.95 -
ATHENA Top End Gasket Kit - Kawasaki P400250600130
ATHENA
$34.95Specifically 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...400250600130- SKU:
- 400250600130
- Availability:
- Ships Same Business Day
- Weight:
- 3.00 LBS
$34.95 -
ATHENA Top End Gasket Kit - Kawasaki P400250600089
ATHENA
$38.95Specifically 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...400250600089- SKU:
- 400250600089
- Availability:
- Ships Same Business Day
- Weight:
- 2.00 LBS
$38.95 -
ATHENA Top End Gasket Kit - Kawasaki P400250600088/1
ATHENA
$16.95Specifically 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...400250600088- SKU:
- 400250600088
- Availability:
- Ships Same Business Day
- Weight:
- 2.00 LBS
$16.95 -
ATHENA Complete Gasket Kit - Honda P400210850520
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...400210850520- SKU:
- 400210850520
- Availability:
- Ships Same Business Day
- Weight:
- 4.00 LBS
$53.95 -
ATHENA Complete Gasket Kit - Honda P400210850505/1
ATHENA
$115.95Superior-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...400210850505- SKU:
- 400210850505
- Availability:
- Ships Same Business Day
- Weight:
- 7.00 LBS
$115.95 -
ATHENA Complete Gasket Kit - Honda P400210850504
ATHENA
$70.95Superior-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...400210850504- SKU:
- 400210850504
- Availability:
- Ships Same Business Day
- Weight:
- 4.00 LBS
$70.95 -
ATHENA Complete Gasket Kit - Honda P400210850501
ATHENA
$33.95Superior-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...400210850501- SKU:
- 400210850501
- Availability:
- Ships Same Business Day
- Weight:
- 4.00 LBS
$33.95Qty in Cart: 0Quantity:Price:$33.95Subtotal: -
ATHENA Complete Gasket Kit - Honda P400210850500
ATHENA
$54.95Superior-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...400210850500- SKU:
- 400210850500
- Availability:
- Ships Same Business Day
- Weight:
- 4.00 LBS
$54.95 -
ATHENA Complete Gasket Kit - Honda P400210850263
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...400210850263- SKU:
- 400210850263
- Availability:
- Ships Same Business Day
- Weight:
- 4.00 LBS
$34.95Qty in Cart: 0Quantity:Price:$34.95Subtotal: -
ATHENA Complete Gasket Kit - Honda P400210850252
ATHENA
$60.95Superior-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...400210850252- SKU:
- 400210850252
- Availability:
- Ships Same Business Day
- Weight:
- 4.00 LBS
$60.95
