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
-
WINDEROSA Complete Gasket Kit with Seals - Yamaha 701 611601
WINDEROSA
$115.97A complete engine gasket failure can leave you stranded, and compromised seals lead to oil leaks that compound into catastrophic engine damage. The WINDEROSA Complete Gasket Kit with Seals for your...PD811530- SKU:
- PD811530
- Availability:
- Ships Same Business Day
- Weight:
- 0.63 LBS
- RIDING STYLE:
- WATERCRAFT
- UNITS:
- SET
- PRODUCT NAME:
- GASKET SET
- TYPE:
- COMPLETE
$115.97 -
WINDEROSA Complete Gasket Kit - WRD701 611602
WINDEROSA
$98.05A complete gasket failure can leave your engine stranded, requiring extensive teardown and costly downtime. The WINDEROSA Complete Gasket Kit WRD701 611602 eliminates guesswork by providing every...PD811532- SKU:
- PD811532
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- TYPE:
- COMPLETE
- PRODUCT NAME:
- GASKET SET
- RIDING STYLE:
- WATERCRAFT
- UNITS:
- SET
$98.05Qty in Cart: 0Quantity:Price:$98.05Subtotal: -
WINDEROSA Complete Gasket Kit - Yamaha 800XL 611607
WINDEROSA
$119.67A complete gasket failure can cost you far more than prevention. This Winderosa gasket kit delivers OEM-quality sealing across your entire Yamaha 800XL engine, eliminating oil leaks and combustion...PD811541- SKU:
- PD811541
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- RIDING STYLE:
- WATERCRAFT
- UNITS:
- SET
- PRODUCT NAME:
- GASKET SET
- TYPE:
- COMPLETE
$119.67 -
WINDEROSA Complete Gasket Kit - Yamaha 1200XL 611608
WINDEROSA
$301.62A complete gasket failure can sideline your 1200XL and compromise engine integrity across multiple systems. The WINDEROSA Complete Gasket Kit eliminates the frustration of sourcing individual seals...PD811542- SKU:
- PD811542
- Availability:
- Ships Same Business Day
- Weight:
- 1.05 LBS
- RIDING STYLE:
- WATERCRAFT
- UNITS:
- SET
- PRODUCT NAME:
- GASKET SET
- TYPE:
- COMPLETE
$301.62 -
WINDEROSA Complete Gasket Kit - Yamaha 1200 611606
WINDEROSA
$230.42A complete gasket failure can strand you trackside or leave your engine weeping oil into your garage. This WINDEROSA Complete Gasket Kit supplies everything you need for a full engine reseal on your...PD811543- SKU:
- PD811543
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
- TYPE:
- COMPLETE
- PRODUCT NAME:
- GASKET SET
- RIDING STYLE:
- WATERCRAFT
- UNITS:
- SET
$230.42 -
HELIX Gasket Sheet 403-5014
HELIX
$33.95A quality gasket sheet is the foundation of a leak-free engine assembly. The HELIX Gasket Sheet 403-5014 provides reliable sealing across critical engine surfaces, preventing oil and coolant seepage...09347175- SKU:
- 09347175
- Availability:
- Ships Same Business Day
- Weight:
- 0.49 LBS
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- RIDING STYLE:
- STREET
- RIDING STYLE:
- UTV
- PRODUCT NAME:
- GASKET SHEET
$33.95 -
HELIX Gasket Sheet 403-5016
HELIX
$49.95A quality gasket sheet is fundamental to maintaining reliable engine sealing across your build—whether you're assembling a race engine or rebuilding a high-performance application. The HELIX Gasket...09347176- SKU:
- 09347176
- Availability:
- Ships Same Business Day
- Weight:
- 1.85 LBS
- PRODUCT NAME:
- GASKET SHEET
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- RIDING STYLE:
- STREET
- RIDING STYLE:
- UTV
- RIDING STYLE:
- OFF-ROAD
$49.95 -
WINDEROSA Top End Gasket Kit - Sea Doo 720 610204
WINDEROSA
$55.72A top-end gasket failure in your Sea Doo 720 means coolant leaks, compression loss, and a powerplant that won't perform. The WINDEROSA Top End Gasket Kit delivers OEM-quality sealing with U.S...PD810405- SKU:
- PD810405
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET KIT
- UNITS:
- KIT
$55.72Qty in Cart: 0Quantity:Price:$55.72Subtotal: -
WINDEROSA Top End Gasket Kit - Sea-Doo 785 610205
WINDEROSA
$55.72A quality gasket kit is foundational to maintaining compression and preventing coolant or oil seepage in your Sea-Doo 785. The WINDEROSA Top End Gasket Kit delivers OEM-equivalent sealing across...PD810410- SKU:
- PD810410
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- TOP END
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
$55.72Qty in Cart: 0Quantity:Price:$55.72Subtotal: -
WINDEROSA Top End Gasket Kit - Sea-Doo 951 610206
WINDEROSA
$139.72A failing top end gasket kit compromises your Sea-Doo 951's compression and invites coolant leaks that cascade into catastrophic engine damage. This WINDEROSA kit delivers OEM-equivalent sealing...PD810415- SKU:
- PD810415
- Availability:
- Ships Same Business Day
- Weight:
- 0.38 LBS
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- TOP END
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
$139.72 -
WINDEROSA Top End Gasket Kit - Kawasaki 300 611100
WINDEROSA
$54.28A complete top-end gasket failure can sideline your engine and derail your rebuild timeline. This Winderosa kit eliminates the frustration of sourcing individual gaskets by delivering every seal,...PD811303- SKU:
- PD811303
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- PRODUCT NAME:
- GASKET
- TYPE:
- COMPLETE
- UNITS:
- KIT
- RIDING STYLE:
- WATERCRAFT
$54.28 -
WINDEROSA Top End Gasket Kit with Seals - K550 611402
WINDEROSA
$94.45A leaking top end doesn't just waste compression—it costs you power and reliability when it matters most. The WINDEROSA K550 Top End Gasket Kit with Seals provides OEM-quality sealing across critical...PD811326- SKU:
- PD811326
- Availability:
- Ships Same Business Day
- Weight:
- 0.56 LBS
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- ENGINE
- TYPE:
- COMPLETE
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
$94.45Qty in Cart: 0Quantity:Price:$94.45Subtotal: -
WINDEROSA Complete Gasket Kit with Seals - K750 611403
WINDEROSA
$94.45Engine gasket failure compromises compression, invites oil leakage, and can turn a reliable machine into a money pit. The WINDEROSA Complete Gasket Kit eliminates guesswork by providing OEM-quality...PD811361- SKU:
- PD811361
- Availability:
- Ships Same Business Day
- Weight:
- 0.60 LBS
- RIDING STYLE:
- WATERCRAFT
- UNITS:
- SET
- PRODUCT NAME:
- GASKET SET
- TYPE:
- COMPLETE
$94.45Qty in Cart: 0Quantity:Price:$94.45Subtotal: -
WINDEROSA Complete Gasket Kit - Polaris 700 611804
WINDEROSA
$96.37Engine gasket failure is one of the most common causes of performance loss and catastrophic engine damage in high-revving applications. The WINDEROSA Complete Gasket Kit ensures proper compression...PD811380- SKU:
- PD811380
- Availability:
- Ships Same Business Day
- Weight:
- 0.44 LBS
- TYPE:
- COMPLETE
- PRODUCT NAME:
- GASKET SET
- RIDING STYLE:
- WATERCRAFT
- UNITS:
- SET
$96.37Qty in Cart: 0Quantity:Price:$96.37Subtotal: -
WINDEROSA Complete Gasket Kit with Seals - Polaris 750 611802
WINDEROSA
$130.45Engine gasket failure is one of the quickest ways to lose compression, burn oil, and watch your rebuild go sideways. The WINDEROSA Complete Gasket Kit eliminates guesswork by supplying every critical...PD811384- SKU:
- PD811384
- Availability:
- Ships Same Business Day
- Weight:
- 0.56 LBS
- PRODUCT NAME:
- GASKET SET
- RIDING STYLE:
- WATERCRAFT
- UNITS:
- SET
- TYPE:
- COMPLETE
$130.45 -
WINDEROSA Top End Gasket Kit - Kawasaki 550 610402
WINDEROSA
$69.97A worn or damaged top-end gasket kit compromises seal integrity, leading to coolant leaks, oil seepage, and potential engine damage. The WINDEROSA 610402 delivers OEM-quality sealing with a complete...PD812326- SKU:
- PD812326
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- WATERCRAFT
- PRODUCT NAME:
- GASKET KIT
- UNITS:
- KIT
- TYPE:
- TOP END
$69.97 -
WINDEROSA Top End Gasket Kit - Kawasaki 650 610104
WINDEROSA
$57.55A top-end gasket kit is essential maintenance for any Kawasaki 650 engine that's seen regular use—worn gaskets lead to compression loss, oil seepage, and reduced performance. The WINDEROSA 610104...PD812343- SKU:
- PD812343
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET KIT
- UNITS:
- KIT
$57.55Qty in Cart: 0Quantity:Price:$57.55Subtotal: -
WINDEROSA Top End Gasket Kit - Kawasaki 750 610403
WINDEROSA
$57.55A compromised top end gasket kit will leak, overheat, and destroy an otherwise solid engine build. The WINDEROSA 610403 is a complete OEM-quality solution for Kawasaki 750 rebuilds, eliminating the...PD812361- SKU:
- PD812361
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- TOP END
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
$57.55 -
WINDEROSA Top End Gasket Kit - Polaris 750 610802
WINDEROSA
$85.62A top-end gasket failure can sideline your Polaris 750 at the worst possible moment. This complete gasket kit from Winderosa covers all critical sealing surfaces—bases, heads, intake, and exhaust—so...PD812384- SKU:
- PD812384
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET KIT
- UNITS:
- KIT
$85.62 -
WINDEROSA Top End Gasket Kit - Sea-Doo 610201
WINDEROSA
$54.30A top-end gasket kit is essential maintenance for any Sea-Doo engine running hard—whether you're rebuilding after high hours or preventing mid-season failures. WINDEROSA's 610201 kit delivers...PD812435- SKU:
- PD812435
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- TOP END
$54.30
