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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MOOSE RACING Top End Gasket Kit - RM 125 810547
MOOSE RACING
$29.14A top-end rebuild demands precision gaskets and seals that won't compromise engine integrity or cost you a fortune. The MOOSE RACING Top End Gasket Kit delivers OEM-equivalent reliability using...M810547- SKU:
- M810547
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$29.14 -
MOOSE RACING Motor Gasket Kit with Seal - KDX200 811440
MOOSE RACING
$91.46A complete engine and transmission rebuild demands precision-fit gaskets and seals—any compromise on fit or material quality leads to leaks, performance loss, and costly rework. The MOOSE RACING...M811440- SKU:
- M811440
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- UNITS:
- KIT
- TYPE:
- COMPLETE
- TYPE:
- ENGINE
$91.46 -
MOOSE RACING Water Pump Rebuild Kit 821577
MOOSE RACING
$54.29A failing water pump can compromise your engine's cooling system and sideline you mid-season. This comprehensive MOOSE RACING rebuild kit gives you every gasket, seal, bearing, and snap ring needed...09345242- SKU:
- 09345242
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- REPAIR KIT
- TYPE:
- WATER PUMP
$54.29Qty in Cart: 0Quantity:Price:$54.29Subtotal: -
MOOSE RACING Top End Gasket Kit - KLR 250 810459
MOOSE RACING
$71.42A top-end rebuild demands precision gaskets and seals that won't compromise engine integrity or performance. The MOOSE RACING Top End Gasket Kit for KLR 250 delivers OEM-quality components at a...M810459- SKU:
- M810459
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$71.42 -
MOOSE RACING Top End Gasket Kit - KLX 300 810461
MOOSE RACING
$33.51A top-end rebuild demands precision gaskets and seals that won't compromise your engine's integrity or your wallet. The MOOSE RACING Top End Gasket Kit gives you OEM-quality components at a fraction...M810461- SKU:
- M810461
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$33.51 -
MOOSE RACING Motor Gasket Kit with Seal - KX125 811422
MOOSE RACING
$69.40A complete engine and transmission rebuild demands precision gaskets and seals that won't compromise your work or your wallet. This Moose Racing kit eliminates the guesswork of sourcing individual...M811422- SKU:
- M811422
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
$69.40Qty in Cart: 0Quantity:Price:$69.40Subtotal: -
MOOSE RACING Motor Gasket Kit with Seal - KX125 811423
MOOSE RACING
$75.98A complete engine and transmission rebuild demands precision-fit gaskets and seals that won't compromise your work or budget. The MOOSE RACING Motor Gasket Kit delivers OEM-equivalent sealing...M811423- SKU:
- M811423
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET
$75.98 -
MOOSE RACING Motor Gasket Kit with Seal - KX125 811425
MOOSE RACING
$99.86A complete engine and transmission rebuild demands precision gaskets and seals that won't compromise your KX125's performance or reliability. This MOOSE Racing kit eliminates the guesswork by...M811425- SKU:
- M811425
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- TYPE:
- ENGINE
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
$99.86 -
MOOSE RACING Motor Gasket Kit with Seal - XR650L 811281
MOOSE RACING
$135.61A complete engine and transmission rebuild requires precision gaskets and seals that won't compromise your XR650L's integrity or performance. MOOSE Racing gasket kits deliver OEM-quality seals at a...M811281- SKU:
- M811281
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- TYPE:
- ENGINE
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- TYPE:
- COMPLETE
- RIDING STYLE:
- OFF-ROAD
$135.61 -
MOOSE RACING Complete Motor Gasket Kit - KX500 808470
MOOSE RACING
$64.22A complete engine and transmission rebuild demands precision gaskets that won't compromise performance or longevity. The MOOSE RACING Complete Motor Gasket Kit eliminates the guesswork by bundling...M808470- SKU:
- M808470
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- TYPE:
- ENGINE
$64.22Qty in Cart: 0Quantity:Price:$64.22Subtotal: -
MOOSE RACING Top End Gasket Kit - XR650L 810281
MOOSE RACING
$70.25A top-end rebuild demands precision gaskets and seals that won't compromise engine integrity or cost you a fortune. The MOOSE RACING Top End Gasket Kit delivers OEM-quality components at a fraction...M810281- SKU:
- M810281
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$70.25 -
Cylinder Works Big Bore Gasket Kit Honda CRF450R 2017-2018 11010-G01
CYLINDER WORKS
$70.65If you're running a big bore kit on your CRF450R, you need a gasket set engineered to handle the increased displacement and combustion pressures. The Cylinder Works Big Bore Gasket Kit ensures...09346004- SKU:
- 09346004
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- TYPE:
- CYLINDER
- BORE SIZE IMPERIAL:
- OVERSIZE (+3.00 MM)
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- DIAMETER METRIC:
- 99.00 MM
- PRODUCT NAME:
- GASKET KIT
$70.65Qty in Cart: 0Quantity:Price:$70.65Subtotal: -
MOOSE RACING Complete Motor Gasket Kit - YZ80 808612
MOOSE RACING
$36.47A complete engine and transmission rebuild demands precision gaskets and seals that won't compromise performance or reliability. This MOOSE RACING kit delivers genuine OEM-quality replacement seals...M808612- SKU:
- M808612
- Availability:
- Ships Same Business Day
- Weight:
- 0.18 LBS
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
$36.47 -
MOOSE RACING Top End Gasket Kit - RM 250 810587
MOOSE RACING
$43.80A top-end rebuild demands precision gaskets and seals that won't compromise your engine's integrity or your budget. The MOOSE RACING Top End Gasket Kit delivers OEM-quality components at a fraction...M810587- SKU:
- M810587
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- KIT
$43.80Qty in Cart: 0Quantity:Price:$43.80Subtotal: -
Cylinder Works Big Bore Gasket Kit for 2016-2023 KTM 250 SX-F 81mm Bore 51006-G01
CYLINDER WORKS
$158.95When you've invested in a big bore kit for your 2016-2023 KTM 250 SX-F, compromising on gaskets undermines everything you've gained. The Cylinder Works Big Bore Gasket Kit ensures complete sealing...09346005- SKU:
- 09346005
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- BORE SIZE IMPERIAL:
- OVERSIZE (+3.00 MM)
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CYLINDER
- UNITS:
- KIT
$158.95 -
On Sale
VESRAH Complete Gasket Kit - Honda 100 VG-120
VESRAH
MSRP: $49.95Now: $47.45Was: $49.95A complete engine rebuild demands precision sealing at every critical junction—missed gaskets mean catastrophic oil leaks, compression loss, and potential engine failure. The VESRAH Complete Gasket...VG120- SKU:
- VG120
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- SET
MSRP: $49.95Now: $47.45Was: $49.95Qty in Cart: 0Quantity:Price:MSRP: $49.95Now: $47.45Was: $49.95Subtotal: -
WINDEROSA Complete Gasket Kit - Kawasaki 1100 611405
WINDEROSA
$169.08A complete engine gasket failure can sideline your Kawasaki 1100 indefinitely, costing you race time and credibility. The WINDEROSA Complete Gasket Kit delivers OEM-quality sealing across every...PD810355- SKU:
- PD810355
- Availability:
- Ships Same Business Day
- Weight:
- 0.69 LBS
- RIDING STYLE:
- WATERCRAFT
- UNITS:
- SET
- PRODUCT NAME:
- GASKET SET
- TYPE:
- COMPLETE
$169.08Qty in Cart: 0Quantity:Price:$169.08Subtotal: -
MOOSE RACING Motor Gasket Kit with Seal - KX500 811474
MOOSE RACING
$73.14A complete engine and transmission rebuild demands precision-fit gaskets and seals—OEM quality without the OEM price tag. This Moose Racing kit eliminates the frustration of sourcing individual...M811474- SKU:
- M811474
- Availability:
- Ships Same Business Day
- Weight:
- 0.32 LBS
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- TYPE:
- ENGINE
$73.14 -
MOOSE RACING Motor Gasket Kit with Seal - YZ250 811665
MOOSE RACING
$68.97A complete engine and transmission rebuild demands OEM-quality gaskets and seals, but OEM pricing shouldn't break your budget. The MOOSE RACING Motor Gasket Kit delivers genuine replacement seals and...M811665- SKU:
- M811665
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- TYPE:
- ENGINE
$68.97 -
MOOSE RACING Top End Gasket Kit - XR200 810241
MOOSE RACING
$20.15A top-end rebuild demands precision-fit gaskets and seals that won't compromise engine integrity or cost you a fortune. The MOOSE RACING Top End Gasket Kit gives you OEM-quality components at a...M810241- SKU:
- M810241
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$20.15Qty in Cart: 0Quantity:Price:$20.15Subtotal:
