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 Motor Gasket Kit with Seal - RM80 811504
MOOSE RACING
$60.28Engine and transmission rebuilds demand precision gaskets and seals that won't compromise your work—OEM-quality components at a fraction of the cost. This Moose Racing motor gasket kit eliminates the...M811504- SKU:
- M811504
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- TYPE:
- ENGINE
$60.28 -
MOOSE RACING Motor Gasket Kit with Seal - RM85 811505
MOOSE RACING
$64.62A complete engine and transmission rebuild demands precision-fit gaskets and seals that won't compromise your RM85's reliability. MOOSE Racing delivers OEM-equivalent quality at a fraction of the...M811505- SKU:
- M811505
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
$64.62 -
MOOSE RACING Motor Gasket Kit with Seal - RM125 811543
MOOSE RACING
$73.14A complete engine and transmission rebuild demands precision-fit gaskets and seals—compromising on quality here means risking oil leaks, combustion loss, and catastrophic failures down the line...M811543- SKU:
- M811543
- Availability:
- Ships Same Business Day
- Weight:
- 0.26 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- TYPE:
- ENGINE
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
$73.14Qty in Cart: 0Quantity:Price:$73.14Subtotal: -
MOOSE RACING Motor Gasket Kit with Seal - RM125 811547
MOOSE RACING
$81.49A complete engine and transmission rebuild demands precision gaskets and seals that fit right the first time—factory tolerances with aftermarket affordability. MOOSE Racing delivers genuine...M811547- SKU:
- M811547
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- TYPE:
- ENGINE
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- PRODUCT NAME:
- GASKET
$81.49 -
MOOSE RACING Motor Gasket Kit with Seal - YZ125 811635
MOOSE RACING
$70.33A complete engine and transmission rebuild demands precision gaskets and seals that won't compromise your engine's integrity or your wallet. The MOOSE RACING Motor Gasket Kit delivers OEM-quality...M811635- SKU:
- M811635
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- UNITS:
- KIT
- TYPE:
- ENGINE
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
$70.33 -
MOOSE RACING Motor Gasket Kit with Seal - YZ125 811636
MOOSE RACING
$73.17A complete engine and transmission rebuild demands precision gaskets and seals that won't compromise your work—OEM-quality parts at a fraction of the cost. Moose Racing delivers genuine replacement...M811636- SKU:
- M811636
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- COMPLETE
- TYPE:
- ENGINE
$73.17 -
MOOSE RACING Motor Gasket Kit with Seal - YZ125 811637
MOOSE RACING
$58.79A complete engine and transmission rebuild demands precision gaskets and seals that won't compromise your work—or your wallet. MOOSE RACING's comprehensive gasket kit delivers OEM-equivalent...M811637- SKU:
- M811637
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- TYPE:
- ENGINE
$58.79 -
MOOSE RACING Top End Gasket Kit - KX 250 810455
MOOSE RACING
$48.17When you're rebuilding a KX 250 top end, OEM gasket kits come with sticker shock. The MOOSE RACING Top End Gasket Kit delivers complete coverage at a fraction of the cost—without sacrificing the...M810455- SKU:
- M810455
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$48.17 -
MOOSE RACING Top End Gasket Kit - KX 250 810456
MOOSE RACING
$48.17A top-end rebuild demands precision—mismatched or worn gaskets compromise compression, invite oil leakage, and undermine engine reliability. The MOOSE RACING Top End Gasket Kit eliminates guesswork...M810456- SKU:
- M810456
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- KIT
$48.17 -
MOOSE RACING Top End Gasket Kit - RM 125 810548
MOOSE RACING
$28.65A top-end rebuild demands precision gaskets and seals that maintain compression integrity and prevent leakage under race conditions. The MOOSE RACING Top End Gasket Kit delivers OEM-quality...M810548- SKU:
- M810548
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- KIT
$28.65 -
MOOSE RACING Top End Gasket Kit - RM 250 810571
MOOSE RACING
$18.96A top-end rebuild demands precision gaskets and seals that maintain compression integrity and prevent leakage under racing conditions. The MOOSE RACING kit eliminates the guesswork by supplying every...M810571- SKU:
- M810571
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- KIT
$18.96 -
MOOSE RACING Top End Gasket Kit - RM 250 810572
MOOSE RACING
$18.96A top-end rebuild demands precision gaskets and seals that won't compromise your engine's integrity or cost you a fortune. This Moose Racing kit delivers OEM-quality components at a fraction of the...M810572- SKU:
- M810572
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
$18.96Qty in Cart: 0Quantity:Price:$18.96Subtotal: -
MOOSE RACING Top End Gasket Kit - RM 250 810573
MOOSE RACING
$24.85A top-end rebuild demands precision and reliability—especially when you're putting in the labor yourself. This MOOSE RACING gasket kit eliminates the guesswork by including every seal, O-ring, and...M810573- SKU:
- M810573
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- UNITS:
- KIT
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
$24.85 -
MOOSE RACING Top End Gasket Kit - RM 250 810574
MOOSE RACING
$29.14A complete top-end rebuild demands precision-matched gaskets and seals that won't compromise your engine's integrity or performance. This Moose Racing kit eliminates the guesswork by including every...M810574- SKU:
- M810574
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- TOP END
$29.14Qty in Cart: 0Quantity:Price:$29.14Subtotal: -
MOOSE RACING Motor Gasket Kit with Seal - KDX200 811442
MOOSE RACING
$84.39A complete engine and transmission rebuild requires precision gaskets and seals that won't compromise your work. This Moose Racing kit delivers OEM-equivalent quality at a fraction of the cost,...M811442- SKU:
- M811442
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- TYPE:
- COMPLETE
- TYPE:
- ENGINE
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- UNITS:
- KIT
$84.39Qty in Cart: 0Quantity:Price:$84.39Subtotal: -
MOOSE RACING Motor Gasket Kit with Seal - KX250 811454
MOOSE RACING
$70.33A complete engine and transmission rebuild demands precision gaskets and seals that won't compromise your work—and OEM replacements often come with OEM pricing. The MOOSE RACING Motor Gasket Kit...M811454- SKU:
- M811454
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
$70.33 -
MOOSE RACING Motor Gasket Kit with Seal - KX250 811455
MOOSE RACING
$70.33A complete engine and transmission rebuild demands precision-fit gaskets and seals—and OEM pricing shouldn't force you to choose between quality and cost. This Moose Racing Motor Gasket Kit delivers...M811455- SKU:
- M811455
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET
$70.33 -
MOOSE RACING Motor Gasket Kit with Seal - KX250 811457
MOOSE RACING
$89.83A complete engine and transmission rebuild demands precision-fit gaskets and seals—factory tolerances won't tolerate improvisation. MOOSE Racing delivers OEM-quality replacement seals at a fraction...M811457- SKU:
- M811457
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- TYPE:
- ENGINE
$89.83Qty in Cart: 0Quantity:Price:$89.83Subtotal: -
MOOSE RACING Motor Gasket Kit with Seal - CR80 811205
MOOSE RACING
$70.33A complete engine and transmission rebuild demands precision gaskets and seals that won't compromise your performance or reliability. MOOSE RACING delivers OEM-quality components at a fraction of...M811205- SKU:
- M811205
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- TYPE:
- ENGINE
$70.33Qty in Cart: 0Quantity:Price:$70.33Subtotal: -
MOOSE RACING Motor Gasket Kit with Seal - CR80 811206
MOOSE RACING
$74.68A complete engine and transmission rebuild demands precision-fit gaskets and seals that won't fail under load. This MOOSE RACING Motor Gasket Kit eliminates the guesswork of sourcing individual...M811206- SKU:
- M811206
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- TYPE:
- ENGINE
$74.68
