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
-
MOOSE RACING Top End Gasket Kit - RM 250 810582
MOOSE RACING
$43.80A 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 delivers OEM-quality components at a fraction...M810582- SKU:
- M810582
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$43.80 -
MOOSE RACING Top End Gasket Kit - RM 250 810583
MOOSE RACING
$43.80A top-end rebuild demands precision gaskets and seals that won't compromise engine integrity or cost your wallet. The MOOSE RACING Top End Gasket Kit delivers OEM-quality components at a fraction of...M810583- SKU:
- M810583
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$43.80 -
MOOSE RACING Motor Gasket Kit with Seal - CR125R 811237
MOOSE RACING
$98.63A complete engine and transmission rebuild requires precision-fit gaskets and seals that won't compromise your work or wallet. The MOOSE RACING Motor Gasket Kit delivers OEM-quality components at a...M811237- SKU:
- M811237
- Availability:
- Ships Same Business Day
- Weight:
- 0.24 LBS
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
$98.63 -
MOOSE RACING Motor Gasket Kit with Seal - CR250 811252
MOOSE RACING
$60.50A complete engine and transmission rebuild demands precision gaskets and seals that won't compromise your performance or reliability. MOOSE Racing delivers OEM-equivalent components at a fraction of...M811252- SKU:
- M811252
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- TYPE:
- COMPLETE
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
$60.50 -
MOOSE RACING Motor Gasket Kit with Seal - CR250 811253
MOOSE RACING
$91.46A complete engine and transmission rebuild demands precision gaskets and seals that won't compromise your work or your wallet. MOOSE Racing delivers OEM-equivalent components at a fraction of...M811253- SKU:
- M811253
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- TYPE:
- ENGINE
$91.46Qty in Cart: 0Quantity:Price:$91.46Subtotal: -
MOOSE RACING Top End Gasket Kit - KDX 200 810440
MOOSE RACING
$35.01A top-end rebuild demands precision gaskets and seals that won't fail under race conditions or heavy use. The MOOSE RACING Top End Gasket Kit eliminates guesswork by providing every component needed...M810440- SKU:
- M810440
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET
- TYPE:
- TOP END
$35.01 -
MOOSE RACING Top End Gasket Kit - KDX 200C 810441
MOOSE RACING
$35.01A top-end rebuild demands precision and reliability—settling for inferior gaskets invites oil leaks, compression loss, and premature failure. The MOOSE RACING Top End Gasket Kit delivers...M810441- SKU:
- M810441
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- PRODUCT NAME:
- GASKET
- TYPE:
- TOP END
- UNITS:
- KIT
$35.01 -
MOOSE RACING Top End Gasket Kit - KDX 200C 810442
MOOSE RACING
$35.01A top-end rebuild demands precision and reliability—Moose Racing delivers both with OEM-quality seals and gaskets at a fraction of OEM pricing. This complete gasket kit eliminates the hassle of...M810442- SKU:
- M810442
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- PRODUCT NAME:
- GASKET
- TYPE:
- TOP END
- UNITS:
- KIT
$35.01 -
MOOSE RACING Top End Gasket Kit - KDX 220 810445
MOOSE RACING
$35.01A top-end rebuild demands precision gaskets and seals that won't fail under race conditions. The MOOSE RACING Top End Gasket Kit gives you OEM-quality components at a fraction of factory pricing, so...M810445- SKU:
- M810445
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- TYPE:
- TOP END
$35.01 -
MOOSE RACING Top End Gasket Kit - KX 250 810452
MOOSE RACING
$29.14A quality top-end gasket kit is essential when rebuilding your KX 250 engine—compromising here with inferior seals leads to oil leaks, compression loss, and premature failure. The MOOSE RACING Top...M810452- SKU:
- M810452
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$29.14Qty in Cart: 0Quantity:Price:$29.14Subtotal: -
MOOSE RACING Top End Gasket Kit - KX 250 810453
MOOSE RACING
$36.47A top-end rebuild demands precision gaskets and seals that won't compromise your engine's integrity or performance. The MOOSE RACING Top End Gasket Kit delivers OEM-quality components at a fraction...M810453- SKU:
- M810453
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- TOP END
$36.47 -
MOOSE RACING Top End Gasket Kit - RM 250 810576
MOOSE RACING
$37.94A top-end rebuild demands precision components that won't compromise engine integrity or your wallet. The MOOSE RACING Gasket Kit delivers OEM-quality seals and gaskets at a fraction of the cost,...M810576- SKU:
- M810576
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- TOP END
$37.94Qty in Cart: 0Quantity:Price:$37.94Subtotal: -
MOOSE RACING Top End Gasket Kit - RMX 250 810578
MOOSE RACING
$37.94A top-end rebuild demands precision gaskets and seals that won't compromise engine integrity or cost you a fortune. This MOOSE RACING kit gives you every component needed for a complete piston...M810578- SKU:
- M810578
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- KIT
$37.94 -
MOOSE RACING Top End Gasket Kit - RMX 250 810579
MOOSE RACING
$37.94A top-end rebuild demands precision gaskets and seals—cheap alternatives lead to leaks, compression loss, and premature failure. The MOOSE RACING Top End Gasket Kit delivers OEM-quality seals at a...M810579- SKU:
- M810579
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- KIT
$37.94 -
MOOSE RACING Top End Gasket Kit - RM 250 810580
MOOSE RACING
$43.80A top-end rebuild demands precision gaskets and seals that won't compromise your engine's integrity or performance. The MOOSE RACING Top End Gasket Kit gives you OEM-quality components at a fraction...M810580- SKU:
- M810580
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- KIT
$43.80Qty in Cart: 0Quantity:Price:$43.80Subtotal: -
MOOSE RACING Top End Gasket Kit - RM 250 810581
MOOSE RACING
$39.34When you're rebuilding a two-stroke top end, gasket integrity directly impacts compression, sealing, and engine longevity. The MOOSE RACING Top End Gasket Kit eliminates the guesswork by bundling...M810581- SKU:
- M810581
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$39.34 -
MOOSE RACING Complete Motor Gasket Kit - PW50 808601
MOOSE RACING
$23.33A complete engine and transmission rebuild demands precision gaskets and seals that won't fail under racing conditions or daily duty. This Moose Racing kit eliminates the guesswork of sourcing...09346102- SKU:
- 09346102
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET
- TYPE:
- ENGINE
$23.33 -
MOOSE RACING Complete Motor Gasket Kit - YZ450F/WR450F 808687
MOOSE RACING
$134.80A complete engine and transmission rebuild demands precision gaskets and seals that won't fail mid-season. The MOOSE RACING Complete Motor Gasket Kit delivers OEM-quality components at a fraction of...09346103- SKU:
- 09346103
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
$134.80 -
MOOSE RACING Water Pump Rebuild Kit 821376
MOOSE RACING
$42.52A failing water pump can compromise your entire cooling system, leading to catastrophic engine damage and costly downtime. This MOOSE Racing rebuild kit supplies every gasket, seal, bearing, and...09345909- SKU:
- 09345909
- Availability:
- Ships Same Business Day
- Weight:
- 0.32 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- REPAIR KIT
- TYPE:
- WATER PUMP
$42.52 -
MOOSE RACING Motor Gasket Kit with Seal - CR250 811259
MOOSE RACING
$80.14A complete engine and transmission rebuild demands precision-fit gaskets and seals that won't compromise your work. MOOSE Racing delivers OEM-equivalent quality at a fraction of OEM pricing, so you...M811259- SKU:
- M811259
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
$80.14
