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 Water Pump Rebuild Kit 821423
MOOSE RACING
$56.48A failing water pump compromises your entire cooling system, risking engine overheating and catastrophic damage during competition or heavy use. The MOOSE RACING Water Pump Rebuild Kit 821423...09345216- SKU:
- 09345216
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP
- UNITS:
- KIT
- PRODUCT NAME:
- REPAIR KIT
$56.48Qty in Cart: 0Quantity:Price:$56.48Subtotal: -
MOOSE RACING Water Pump Rebuild Kit 821545
MOOSE RACING
$49.64A failing water pump can strand you on the track or leave you stranded on the road. Rather than replacing the entire assembly, this MOOSE RACING rebuild kit lets you restore your existing pump to...09345237- SKU:
- 09345237
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- PRODUCT NAME:
- REPAIR KIT
- TYPE:
- WATER PUMP
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
$49.64Qty in Cart: 0Quantity:Price:$49.64Subtotal: -
MOOSE RACING Exhaust Gasket Kit 823060
MOOSE RACING
$8.13A compromised exhaust gasket will rob your engine of power, create unwanted heat, and invite costly leaks that cascade into bigger problems. MOOSE RACING's Exhaust Gasket Kit 823060 delivers...09345280- SKU:
- 09345280
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- EXHAUST
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- STREET
$8.13 -
MOOSE RACING Exhaust Gasket Kit 823067
MOOSE RACING
$8.21A quality exhaust gasket kit is essential for maintaining proper seal integrity in your exhaust system—preventing dangerous exhaust leaks, reducing emissions, and preserving peak engine performance...09345284- SKU:
- 09345284
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- EXHAUST
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$8.21Qty in Cart: 0Quantity:Price:$8.21Subtotal: -
MOOSE RACING Exhaust Gasket Kit 823070
MOOSE RACING
$8.13MOOSE RACING Exhaust Gasket Kit09345287- SKU:
- 09345287
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- TYPE:
- EXHAUST
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- ATV
- RIDING STYLE:
- STREET
- RIDING STYLE:
- OFF-ROAD
$8.13 -
MOOSE RACING Water Pump Rebuild Kit 821232
MOOSE RACING
$47.89A failing water pump can compromise cooling system integrity and risk catastrophic engine damage. The MOOSE RACING Water Pump Rebuild Kit 821232 provides every gasket, seal, bearing, and snap ring...09345180- SKU:
- 09345180
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP
- UNITS:
- KIT
- PRODUCT NAME:
- REPAIR KIT
$47.89 -
MOOSE RACING Clutch Cover Gasket 817785
MOOSE RACING
$9.60A leaking clutch cover gasket compromises engine sealing and invites oil contamination into your drivetrain—a costly problem that compounds quickly. The MOOSE RACING Clutch Cover Gasket 817785...09340565- SKU:
- 09340565
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CLUTCH COVER
- UNITS:
- EACH
$9.60 -
MOOSE RACING Complete Motor Gasket Kit - TTR/XT 808643
MOOSE RACING
$84.78A complete engine and transmission rebuild demands gaskets and seals that meet OEM specifications without the OEM price tag. The MOOSE RACING Complete Motor Gasket Kit delivers genuine reliability...09340625- SKU:
- 09340625
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- TYPE:
- ENGINE
$84.78 -
MOOSE RACING Top End Gasket Kit - KTM 400/450 810317
MOOSE RACING
$98.96A top-end rebuild demands precision gaskets and seals that won't compromise engine integrity or force you to choose between quality and cost. This MOOSE RACING kit supplies everything you need to...09340627- SKU:
- 09340627
- Availability:
- Ships Same Business Day
- Weight:
- 0.17 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- RIDING STYLE:
- ATV
- TYPE:
- TOP END
$98.96Qty in Cart: 0Quantity:Price:$98.96Subtotal: -
MOOSE RACING Motor Gasket Kit with Seal - CR250 811256
MOOSE RACING
$78.83A complete engine and transmission rebuild demands OEM-quality gaskets and seals without the premium price tag. This Moose Racing kit eliminates the hassle of sourcing individual components—every...M811256- SKU:
- M811256
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- TYPE:
- ENGINE
$78.83Qty in Cart: 0Quantity:Price:$78.83Subtotal: -
MOOSE RACING Top End Gasket Kit - RM 250 810575
MOOSE RACING
$37.94A top-end rebuild demands precision-fit gaskets and seals that won't compromise your engine's integrity or performance. The MOOSE RACING Top End Gasket Kit gives you every component needed for a...M810575- SKU:
- M810575
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$37.94Qty in Cart: 0Quantity:Price:$37.94Subtotal: -
MOOSE RACING Top End Gasket Kit - RM 250 810577
MOOSE RACING
$37.94Whether you're rebuilding after a piston replacement or looking for a cost-effective compression increase, a complete top-end gasket kit eliminates the guesswork and expense of sourcing individual...M810577- SKU:
- M810577
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
$37.94Qty in Cart: 0Quantity:Price:$37.94Subtotal: -
MOOSE RACING Complete Motor Gasket Kit - YZ450F/WR450F 808997
MOOSE RACING
$143.44A complete engine rebuild requires precision gaskets and seals that won't fail mid-season. The MOOSE RACING Complete Motor Gasket Kit eliminates the guesswork of sourcing individual components,...09346104- SKU:
- 09346104
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- TYPE:
- ENGINE
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- GASKET
$143.44Qty in Cart: 0Quantity:Price:$143.44Subtotal: -
MOOSE RACING Complete Motor Gasket Kit - FE250 808999
MOOSE RACING
$62.57A complete engine and transmission rebuild demands gasket and seal sets engineered for precision fit and long-term durability. The MOOSE RACING Complete Motor Gasket Kit eliminates the frustration of...09346106- SKU:
- 09346106
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
$62.57Qty in Cart: 0Quantity:Price:$62.57Subtotal: -
MOOSE RACING Top End Gasket Kit - KX 125 810421
MOOSE RACING
$30.57A top-end rebuild demands gasket and seal quality that matches OEM standards without the OEM price tag. This Moose Racing kit eliminates the guesswork—every component you need comes in one set,...M810421- SKU:
- M810421
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- TOP END
$30.57 -
MOOSE RACING Top End Gasket Kit - KX 125 810422
MOOSE RACING
$35.01When you're rebuilding a KX 125 top end, you need gaskets and seals that won't compromise your engine's integrity or your wallet. The MOOSE RACING Top End Gasket Kit delivers OEM-quality components...M810422- SKU:
- M810422
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- UNITS:
- KIT
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
$35.01 -
MOOSE RACING Top End Gasket Kit - KX 125 810426
MOOSE RACING
$35.01A top-end rebuild demands precision components that won't compromise engine integrity or performance. This Moose Racing gasket kit eliminates the guesswork by providing every seal, O-ring, and gasket...M810426- SKU:
- M810426
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- TOP END
$35.01 -
MOOSE RACING Top End Gasket Kit - KX 125 810427
MOOSE RACING
$42.36A top-end rebuild demands precision gaskets and seals that won't let you down mid-season. The MOOSE RACING Top End Gasket Kit delivers OEM-quality replacement seals at a fraction of the cost, so you...M810427- SKU:
- M810427
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$42.36 -
MOOSE RACING Motor Gasket Kit with Seal - KX250 811452
MOOSE RACING
$56.08A complete engine and transmission rebuild demands precision-fit gaskets and seals—compromising on these components introduces oil leaks, compression loss, and premature failure. The MOOSE RACING...M811452- SKU:
- M811452
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- TYPE:
- ENGINE
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- TYPE:
- COMPLETE
- RIDING STYLE:
- OFF-ROAD
$56.08Qty in Cart: 0Quantity:Price:$56.08Subtotal: -
MOOSE RACING Top End Gasket Kit - KX 250 810454
MOOSE RACING
$40.87A top-end rebuild demands precision and reliability—cutting corners on gaskets and seals is a guaranteed path to failure. The MOOSE RACING Top End Gasket Kit delivers OEM-equivalent performance at a...M810454- SKU:
- M810454
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- UNITS:
- KIT
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
$40.87
