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 high-tech materials, letting you confidently refresh your RM...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 Motor Gasket Kit delivers OEM-equivalent sealing at a...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 to restore your pump to OEM specifications without the...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 fraction of dealer pricing, giving you the confidence to...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 of the cost, with every gasket, O-ring, and seal you...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 components—every gasket, oil seal, and valve seal you...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 surfaces at a fraction of genuine Kawasaki pricing, letting...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 including every gasket and seal you need in one package,...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 fraction of the cost, letting you rebuild with...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 every gasket, seal, and o-ring you need in one trusted...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 of the price, letting you confidently restore your...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 reliable sealing across all engine surfaces, preventing...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 and U.S.A.-manufactured gaskets at a fraction of what...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 of the cost, letting you restore your RM 250 with...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 integrity across your 81mm bore, preventing blow-by and...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 Kit VG-120 supplies every gasket, o-ring, and valve...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: $49.95 -
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 critical junction—from the cylinder head to the...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 components by bundling everything you need for a thorough,...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 precision-formed gaskets at a fraction of dealer cost,...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 fraction of OEM pricing, letting you confidently rebuild...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:
