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
-
On Sale
PROX Gasket Kit - Complete - Suzuki 34.3323
PROX
MSRP: $139.95Now: $119.00Was: $139.95A complete gasket kit is essential for maintaining proper engine sealing and preventing fluid leaks during high-performance operation. Whether you're rebuilding after a refresh or replacing worn seals, this PROX kit delivers OEM-quality gaskets...09345580- SKU:
- 09345580
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
MSRP: $139.95Now: $119.00Was: $139.95Qty in Cart: 0Quantity:Price:MSRP: $139.95Now: $119.00Was: $139.95Subtotal: -
On Sale
PROX Gasket Kit - Complete - Suzuki 34.3409
PROX
MSRP: $193.95Now: $157.00Was: $193.95A complete gasket kit is the foundation of a reliable engine rebuild—seal degradation leads to oil leaks, compression loss, and potential catastrophic failure. The PROX Gasket Kit for Suzuki applications delivers OEM-equivalent sealing performance with...09345585- SKU:
- 09345585
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
- UNITS:
- KIT
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
MSRP: $193.95Now: $157.00Was: $193.95 -
On Sale
PROX Gasket Kit - Complete - Suzuki 34.3420
PROX
MSRP: $141.95Now: $115.00Was: $141.95A complete gasket kit is essential for any engine rebuild or head gasket replacement, as it ensures proper sealing across all critical surfaces and prevents oil, coolant, and combustion leakage. The PROX Gasket Kit for Suzuki engines delivers...09345586- SKU:
- 09345586
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
MSRP: $141.95Now: $115.00Was: $141.95 -
On Sale
PROX Gasket Kit - Complete - Kawasaki 34.4121
PROX
MSRP: $72.95Now: $59.00Was: $72.95A complete gasket kit is essential for any engine rebuild or top-end service—it eliminates the guesswork of sourcing individual gaskets and seals, ensuring proper sealing across all critical engine surfaces. PROX's complete kit for Kawasaki engines...09345592- SKU:
- 09345592
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
MSRP: $72.95Now: $59.00Was: $72.95 -
On Sale
PROX Gasket Kit - Complete - Kawasaki 34.4221
PROX
MSRP: $105.95Now: $85.00Was: $105.95A complete gasket kit is the foundation of engine reliability—sealing surfaces that prevent oil leaks, coolant loss, and combustion blow-by that compromise performance and longevity. PROX's complete gasket kit for Kawasaki applications eliminates the...09345598- SKU:
- 09345598
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- GASKET KIT
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
MSRP: $105.95Now: $85.00Was: $105.95 -
On Sale
PROX Gasket Kit - Complete - Kawasaki 34.4285
PROX
MSRP: $109.95Now: $93.00Was: $109.95A complete gasket kit is essential for any engine rebuild or top-end overhaul—it ensures a proper seal across all critical junctures and prevents oil leaks, coolant seepage, and combustion blow-by that compromise performance and reliability. The PROX...09345600- SKU:
- 09345600
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
MSRP: $109.95Now: $93.00Was: $109.95Qty in Cart: 0Quantity:Price:MSRP: $109.95Now: $93.00Was: $109.95Subtotal: -
On Sale
PROX Gasket Kit - Complete - Kawasaki 34.4313
PROX
MSRP: $109.95Now: $89.00Was: $109.95A complete gasket kit is essential maintenance for any serious Kawasaki engine builder or race mechanic. Worn or degraded gaskets lead to fluid leaks, compression loss, and potential catastrophic engine failure—issues that derail both track days and...09345602- SKU:
- 09345602
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
MSRP: $109.95Now: $89.00Was: $109.95 -
On Sale
PROX Gasket Kit - Complete - Kawasaki 34.4334
PROX
MSRP: $159.95Now: $136.00Was: $159.95A complete gasket kit is essential for any engine rebuild or major service—it ensures a reliable, leak-free seal across all critical engine surfaces. PROX's Kawasaki-specific gasket kit eliminates the guesswork of sourcing individual gaskets, giving you...09345604- SKU:
- 09345604
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- PRODUCT NAME:
- GASKET KIT
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
MSRP: $159.95Now: $136.00Was: $159.95 -
On Sale
PROX Gasket Kit - Complete - Kawasaki 34.4336
PROX
MSRP: $149.95Now: $127.00Was: $149.95A complete gasket kit is essential for any engine rebuild or top-end refresh—it ensures a proper seal across all critical engine surfaces and prevents oil leaks, coolant seepage, and combustion blow-by that can compromise performance and reliability. The...09345605- SKU:
- 09345605
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
MSRP: $149.95Now: $127.00Was: $149.95 -
On Sale
PROX Gasket Kit - Complete - Kawasaki 34.4409
PROX
MSRP: $115.95Now: $93.00Was: $115.95A complete gasket kit is essential for any engine rebuild or top-end service—it ensures a proper seal across all critical surfaces and prevents costly oil and coolant leaks that can compromise engine integrity. The PROX Gasket Kit for Kawasaki...09345608- SKU:
- 09345608
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
MSRP: $115.95Now: $93.00Was: $115.95Qty in Cart: 0Quantity:Price:MSRP: $115.95Now: $93.00Was: $115.95Subtotal: -
On Sale
PROX Gasket Kit - Complete - Kawasaki 34.4419
PROX
MSRP: $205.95Now: $166.00Was: $205.95A complete gasket kit is essential for any engine rebuild or top-end refresh—it ensures proper sealing across all critical combustion chamber surfaces and prevents oil weeping at assembly joints. PROX's complete gasket sets eliminate the guesswork of...09345610- SKU:
- 09345610
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- GASKET KIT
MSRP: $205.95Now: $166.00Was: $205.95 -
On Sale
PROX Gasket Kit - Complete - KTM 34.6011
PROX
MSRP: $49.95Now: $42.00Was: $49.95A complete gasket kit is essential for any engine rebuild or top-end service on your KTM—it ensures a proper seal across all critical junctures, preventing oil leaks and combustion blowby that compromise performance and reliability. The PROX Gasket Kit...09345611- SKU:
- 09345611
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
MSRP: $49.95Now: $42.00Was: $49.95Qty in Cart: 0Quantity:Price:MSRP: $49.95Now: $42.00Was: $49.95Subtotal: -
On Sale
PROX Gasket Kit - Complete - KTM 34.6018
PROX
MSRP: $94.95Now: $81.00Was: $94.95A complete gasket kit is essential for any KTM engine rebuild or major service—it ensures a proper seal across all critical engine surfaces and eliminates the guesswork of sourcing individual gaskets from multiple suppliers. The PROX Gasket Kit...09345613- SKU:
- 09345613
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- COMPLETE
- PRODUCT NAME:
- GASKET KIT
MSRP: $94.95Now: $81.00Was: $94.95Qty in Cart: 0Quantity:Price:MSRP: $94.95Now: $81.00Was: $94.95Subtotal: -
On Sale
PROX Gasket Kit - Complete - KTM 34.6218
PROX
MSRP: $94.95Now: $81.00Was: $94.95A complete gasket kit is essential for any engine rebuild or top-end service on your KTM—it ensures proper sealing across all critical engine surfaces and prevents oil leaks, coolant seepage, and combustion blow-by that compromise performance and...09345618- SKU:
- 09345618
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
MSRP: $94.95Now: $81.00Was: $94.95 -
On Sale
PROX Gasket Kit - Complete - KTM 34.6222
PROX
MSRP: $99.95Now: $81.00Was: $99.95A complete gasket kit is essential maintenance for any KTM engine—it seals critical combustion chambers and prevents oil seepage that compromises performance and reliability. Whether you're rebuilding after significant mileage or preparing for a race...09345619- SKU:
- 09345619
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
MSRP: $99.95Now: $81.00Was: $99.95Qty in Cart: 0Quantity:Price:MSRP: $99.95Now: $81.00Was: $99.95Subtotal: -
On Sale
PROX Gasket Kit - Complete - KTM 34.6227
PROX
MSRP: $130.95Now: $106.00Was: $130.95A complete gasket kit is essential for any engine rebuild or top-end overhaul—it ensures proper sealing across all critical engine surfaces and prevents oil leaks that compromise performance and reliability. The PROX Gasket Kit for KTM delivers...09345620- SKU:
- 09345620
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- UNITS:
- KIT
- ENGINE TYPE:
- 2-STROKE
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- STREET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
MSRP: $130.95Now: $106.00Was: $130.95 -
On Sale
PROX Gasket Kit - Complete - KTM 34.6320
PROX
MSRP: $94.95Now: $81.00Was: $94.95A complete gasket kit is essential for any engine rebuild or top-end refresh—it ensures proper sealing across all critical junctions and prevents oil leaks, coolant seepage, and combustion gas bypass that compromise performance and reliability. The PROX...09345625- SKU:
- 09345625
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- STREET
MSRP: $94.95Now: $81.00Was: $94.95Qty in Cart: 0Quantity:Price:MSRP: $94.95Now: $81.00Was: $94.95Subtotal: -
On Sale
PROX Gasket Kit - Complete - KTM 34.6327
PROX
MSRP: $120.95Now: $98.00Was: $120.95A complete gasket kit is essential for maintaining proper sealing integrity across your KTM engine—preventing oil leaks, coolant seepage, and compression loss that compromise performance and reliability. Whether you're rebuilding after a full teardown or...09345629- SKU:
- 09345629
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- STREET
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
MSRP: $120.95Now: $98.00Was: $120.95 -
On Sale
PROX Gasket Kit - Complete - KTM 34.6328
PROX
MSRP: $124.95Now: $106.00Was: $124.95A complete gasket kit is essential for any KTM engine rebuild or top-end service, ensuring proper sealing across all critical junctions and preventing fluid leakage that compromises performance and reliability. The PROX Gasket Kit delivers OEM-equivalent...09345630- SKU:
- 09345630
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- STREET
MSRP: $124.95Now: $106.00Was: $124.95 -
On Sale
PROX Gasket Kit - Complete - KTM 34.6348
PROX
MSRP: $99.95Now: $81.00Was: $99.95A complete gasket kit is essential maintenance for any KTM engine rebuild or top-end refresh. Worn or degraded gaskets lead to compression loss, oil seepage, and potential catastrophic engine failure. PROX's complete gasket set eliminates guesswork by...09345637- SKU:
- 09345637
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- UNITS:
- KIT
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- STREET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
MSRP: $99.95Now: $81.00Was: $99.95
