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!
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On Sale
COMETIC Top End Gasket Kit - 97 mm - Yamaha C3813
COMETIC
MSRP: $87.95Now: $83.00Was: $87.95Top End Gasket Kit - 97 mm - Yamaha Top end gasket kit includes 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...09347863- SKU:
- 09347863
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
MSRP: $87.95Now: $83.00Was: $87.95 -
On Sale
COMETIC Top End Gasket Kit - KTM C3818
COMETIC
MSRP: $47.95Now: $45.00Was: $47.95Top End Gasket Kit - KTM Top end gasket kit includes 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...09347864- SKU:
- 09347864
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
MSRP: $47.95Now: $45.00Was: $47.95 -
On Sale
COMETIC Top End Gasket Kit - 47 mm - Kawasaki/Suzuki C7682
COMETIC
MSRP: $28.95Now: $27.00Was: $28.95Top End Gasket Kit - 47 mm - Kawasaki/Suzuki Top end gasket kit includes 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...09347866- SKU:
- 09347866
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
MSRP: $28.95Now: $27.00Was: $28.95 -
On Sale
COMETIC Top End Gasket Kit - 98 mm - Yamaha C3178-EST
COMETIC
MSRP: $90.95Now: $85.00Was: $90.95Top End Gasket Kit - 98 mm - Yamaha Top end gasket kit includes 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...09347825- SKU:
- 09347825
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
MSRP: $90.95Now: $85.00Was: $90.95 -
On Sale
COMETIC Top End Gasket Kit - 99 mm - Yamaha C3279-EST
COMETIC
MSRP: $90.95Now: $85.00Was: $90.95Top End Gasket Kit - 99 mm - Yamaha Top end gasket kit includes 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...09347829- SKU:
- 09347829
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
MSRP: $90.95Now: $85.00Was: $90.95 -
On Sale
VERTEX Top End Gasket Kit - Honda 810267
VERTEX
MSRP: $86.55Now: $77.90Was: $86.55VERTEX Top End Gasket Kit - 810267 Designed specifically for Honda engines for a perfect fit. Includes all necessary gaskets for a complete top end rebuild. Made from high-quality materials for durability and reliability. Engineered to...09347999- SKU:
- 09347999
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
MSRP: $86.55Now: $77.90Was: $86.55 -
On Sale
VERTEX Top End Gasket Kit - Husaberg/Husqvarna/KTM 810333
VERTEX
MSRP: $48.37Now: $43.53Was: $48.37VERTEX Top End Gasket Kit - Husaberg/Husqvarna/KTM09348000- SKU:
- 09348000
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
MSRP: $48.37Now: $43.53Was: $48.37 -
On Sale
VERTEX Top End Gasket Kit - Honda 810262
VERTEX
MSRP: $78.72Now: $70.85Was: $78.72VERTEX Top End Gasket Kit - Honda09348001- SKU:
- 09348001
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
MSRP: $78.72Now: $70.85Was: $78.72 -
On Sale
VERTEX Top End Gasket Kit - KTM 810328
VERTEX
MSRP: $82.17Now: $73.95Was: $82.17VERTEX Top End Gasket Kit - 810328 High-quality gasket kit designed for KTM models. Includes all necessary gaskets for a complete top-end rebuild. Engineered for optimal sealing and performance. Durable materials withstand high...09348004- SKU:
- 09348004
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
MSRP: $82.17Now: $73.95Was: $82.17 -
On Sale
VERTEX Top End Gasket Kit - Yamaha 810676
VERTEX
MSRP: $70.38Now: $63.34Was: $70.38VERTEX Top End Gasket Kit - Yamaha09348005- SKU:
- 09348005
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
MSRP: $70.38Now: $63.34Was: $70.38 -
On Sale
VERTEX Top End Gasket Kit - Yamaha 810677
VERTEX
MSRP: $70.38Now: $63.34Was: $70.38VERTEX Top End Gasket Kit - 810677 High-quality gasket kit designed specifically for Yamaha engines. Includes all necessary gaskets for a complete top-end rebuild. Durable materials ensure a reliable seal and long-lasting performance. ...09348006- SKU:
- 09348006
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
MSRP: $70.38Now: $63.34Was: $70.38 -
On Sale
VERTEX Top End Gasket Kit - Honda 8100000
VERTEX
MSRP: $82.30Now: $74.07Was: $82.30VERTEX Top End Gasket Kit - Honda09348007- SKU:
- 09348007
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
MSRP: $82.30Now: $74.07Was: $82.30 -
On Sale
VERTEX Top End Gasket Kit - Suzuki 810505
VERTEX
MSRP: $22.38Now: $20.14Was: $22.38VERTEX Top End Gasket Kit - 810505 High-quality gaskets designed specifically for Suzuki engines. Engineered for optimal sealing and performance under extreme conditions. Includes all necessary components for a complete top-end rebuild. ...09348010- SKU:
- 09348010
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
MSRP: $22.38Now: $20.14Was: $22.38 -
On Sale
VERTEX Top End Gasket Kit - Husaberg/Husqvarna/KTM 810335
VERTEX
MSRP: $41.03Now: $36.93Was: $41.03VERTEX Top End Gasket Kit - 810335 High-quality gasket kit designed for optimal sealing performance. Compatible with Husaberg, Husqvarna, and KTM models. Durable materials ensure longevity and reliability under extreme conditions. Easy...09348011- SKU:
- 09348011
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
MSRP: $41.03Now: $36.93Was: $41.03 -
On Sale
VERTEX Top End Gasket Kit - Honda 810241
VERTEX
MSRP: $52.63Now: $47.37Was: $52.63VERTEX Top End Gasket Kit - 810241 High-quality gasket kit designed specifically for Honda engines. Includes all necessary gaskets for a complete top-end rebuild. Made from durable materials to ensure a reliable seal and long-lasting...09348015- SKU:
- 09348015
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
MSRP: $52.63Now: $47.37Was: $52.63 -
On Sale
VERTEX Top End Gasket Kit - Yamaha 810690
VERTEX
MSRP: $55.05Now: $49.55Was: $55.05VERTEX Top End Gasket Kit - 810690 High-quality gasket kit designed specifically for Yamaha engines. Includes all necessary gaskets for a complete top-end rebuild. Precision-engineered for optimal performance and durability. Resistant to...09348017- SKU:
- 09348017
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
MSRP: $55.05Now: $49.55Was: $55.05 -
On Sale
VERTEX Top End Gasket Kit - Yamaha 810614
VERTEX
MSRP: $24.92Now: $22.43Was: $24.92VERTEX Top End Gasket Kit - 810614 High-quality gasket kit designed specifically for Yamaha engines. Complete set includes all necessary gaskets for top-end repairs. Durable materials ensure long-lasting performance and reliability. Easy...09348022- SKU:
- 09348022
- Availability:
- Ships Same Business Day
- Weight:
- 0.09 LBS
MSRP: $24.92Now: $22.43Was: $24.92 -
On Sale
VERTEX Top End Gasket Kit - Yamaha 8100025
VERTEX
MSRP: $80.70Now: $72.63Was: $80.70VERTEX Top End Gasket Kit - 8100025 High-quality gasket kit designed specifically for Yamaha engines Includes all necessary gaskets for a complete top end rebuild Durable materials ensure long-lasting performance and reliability ...09348023- SKU:
- 09348023
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
MSRP: $80.70Now: $72.63Was: $80.70 -
On Sale
VERTEX Top End Gasket Kit - KTM 810309
VERTEX
MSRP: $32.83Now: $29.55Was: $32.83VERTEX Top End Gasket Kit - 810309 High-quality gasket kit designed specifically for KTM models. Ensures a perfect seal for optimal engine performance. Durable materials resistant to heat and wear. Easy installation with all necessary...09348028- SKU:
- 09348028
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
MSRP: $32.83Now: $29.55Was: $32.83 -
On Sale
VERTEX Top End Gasket Kit - Gas Gas/Husqvarna/KTM 810374
VERTEX
MSRP: $74.78Now: $67.30Was: $74.78VERTEX Top End Gasket Kit - Gas Gas/Husqvarna/KTM09348029- SKU:
- 09348029
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
MSRP: $74.78Now: $67.30Was: $74.78
