Dirt Bike Engine
Dirt Bike Engine Parts at JJ Motorsports
Discover a full range of dirt bike engine components for rebuilding or upgrading your performance from JJ Motorsports. From crankshafts to cylinder heads and piston kits, these precision-engineered components ensure reliable performance. For additional upgrades, check out our full selection of off-road dirt bike parts to keep your engine running at peak efficiency on the track or trails.
Shop trusted brands like Wiseco for forged piston kits and K&N for high-flow oil filters. Explore related categories such as Dirt Bike Air and Fuel for intake upgrades or Dirt Bike Exhaust for complete systems.
Browse our in-stock inventory below with same-day shipping and expert support. Questions? Contact us for fitment advice!
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
-
On Sale
VESRAH Exhaust Valve GG-1040-EX
VESRAH
MSRP: $42.67Now: $40.54Was: $42.67A worn or damaged exhaust valve can compromise combustion efficiency, increase emissions, and reduce engine responsiveness. The VESRAH Exhaust Valve GG-1040-EX delivers OEM-equivalent performance at a fraction of replacement costs, restoring your...09262807- SKU:
- 09262807
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- APPLICATION:
- EXHAUST
- LENGTH METRIC:
- 96.00 MM
- HEAD DIAMETER METRIC:
- 23.50 MM
- HEAD DIAMETER:
- 23,50 MM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- UNITS:
- 2 PIECE
- PRODUCT NAME:
- VALVE
- STEM DIAMETER METRIC:
- 5.50 MM
MSRP: $42.67Now: $40.54Was: $42.67 -
On Sale
VESRAH Intake Valve GG-1041-IN
VESRAH
MSRP: $23.33Now: $22.16Was: $23.33A worn or damaged intake valve directly compromises combustion efficiency, reducing horsepower and increasing fuel consumption—a problem that compounds quickly in high-performance applications. The VESRAH Intake Valve GG-1041-IN restores OEM-spec...09260050- SKU:
- 09260050
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- APPLICATION:
- INTAKE
- HEAD DIAMETER:
- 28,50 MM
- UNITS:
- EACH
- HEAD DIAMETER METRIC:
- 28.50 MM
- LENGTH METRIC:
- 96.60 MM
- PRODUCT NAME:
- VALVE
- STEM DIAMETER METRIC:
- 5.00 MM
- RIDING STYLE:
- OFF-ROAD
MSRP: $23.33Now: $22.16Was: $23.33 -
On Sale
VESRAH Exhaust Valve GG-1041-EX
VESRAH
MSRP: $41.33Now: $39.26Was: $41.33A worn or damaged exhaust valve compromises combustion efficiency, increases emissions, and reduces engine responsiveness. The VESRAH GG-1041-EX is precision-engineered to OEM specifications, ensuring reliable sealing and consistent performance across...09260051- SKU:
- 09260051
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- HEAD DIAMETER:
- 23,50 MM
- RIDING STYLE:
- OFF-ROAD
- HEAD DIAMETER METRIC:
- 23.50 MM
- UNITS:
- EACH
- APPLICATION:
- EXHAUST
- LENGTH METRIC:
- 95.60 MM
- PRODUCT NAME:
- VALVE
- STEM DIAMETER METRIC:
- 5.00 MM
MSRP: $41.33Now: $39.26Was: $41.33 -
On Sale
VESRAH Intake Valve GG-1030-IN
VESRAH
MSRP: $26.50Now: $25.18Was: $26.50A worn or damaged intake valve compromises combustion efficiency, throttle response, and fuel economy—degrading performance across the board. The VESRAH GG-1030-IN is precision-manufactured to OEM specifications, ensuring reliable sealing and consistent...09260052- SKU:
- 09260052
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- APPLICATION:
- INTAKE
- RIDING STYLE:
- ATV
- STEM DIAMETER METRIC:
- 5.50 MM
- UNITS:
- EACH
- PRODUCT NAME:
- VALVE
- HEAD DIAMETER METRIC:
- 33.00 MM
- HEAD DIAMETER:
- 33,00 MM
- LENGTH METRIC:
- 102.70 MM
MSRP: $26.50Now: $25.18Was: $26.50 -
On Sale
VESRAH Exhaust Valve GG-1030-EX
VESRAH
MSRP: $47.83Now: $45.44Was: $47.83A worn or damaged exhaust valve compromises combustion efficiency, reduces power output, and can lead to catastrophic engine failure if left unaddressed. The VESRAH GG-1030-EX is precision-engineered to restore OEM-spec performance, ensuring proper...09260053- SKU:
- 09260053
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- VALVE
- RIDING STYLE:
- ATV
- STEM DIAMETER METRIC:
- 5.50 MM
- UNITS:
- EACH
- APPLICATION:
- EXHAUST
- HEAD DIAMETER METRIC:
- 29.00 MM
- LENGTH METRIC:
- 101.20 MM
- HEAD DIAMETER:
- 29,00 MM
MSRP: $47.83Now: $45.44Was: $47.83 -
On Sale
VESRAH Intake Valve GG-1046-IN
VESRAH
MSRP: $37.57Now: $35.69Was: $37.57If your engine is showing signs of wear or you're rebuilding for peak performance, OEM-quality intake valves are non-negotiable. The VESRAH Intake Valve GG-1046-IN delivers precision-manufactured construction that matches factory specifications, ensuring...09260056- SKU:
- 09260056
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- LENGTH METRIC:
- 102.30 MM
- RIDING STYLE:
- OFF-ROAD
- STEM DIAMETER METRIC:
- 6.60 MM
- APPLICATION:
- INTAKE
- HEAD DIAMETER METRIC:
- 37.00 MM
- UNITS:
- EACH
- HEAD DIAMETER:
- 37,00 MM
- PRODUCT NAME:
- VALVE
MSRP: $37.57Now: $35.69Was: $37.57Qty in Cart: 0Quantity:Price:MSRP: $37.57Now: $35.69Was: $37.57Subtotal: -
On Sale
VESRAH Intake Valve GG-3044-IN
VESRAH
MSRP: $33.00Now: $31.35Was: $33.00A properly functioning intake valve is critical to engine performance and longevity. Over time, factory valves wear, warp, or develop carbon buildup that restricts airflow and reduces combustion efficiency. The VESRAH Intake Valve GG-3044-IN is...09260062- SKU:
- 09260062
- Availability:
- Ships Same Business Day
- Weight:
- 0.07 LBS
- HEAD DIAMETER METRIC:
- 36.00 MM
- PRODUCT NAME:
- VALVE
- RIDING STYLE:
- OFF-ROAD
- STEM DIAMETER METRIC:
- 5.00 MM
- APPLICATION:
- INTAKE
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- HEAD DIAMETER:
- 36,00 MM
- LENGTH METRIC:
- 82.47 MM
MSRP: $33.00Now: $31.35Was: $33.00 -
On Sale
VESRAH Exhaust Valve GG-3044-EX
VESRAH
MSRP: $47.00Now: $44.65Was: $47.00A worn or damaged exhaust valve can compromise your engine's scavenging efficiency and power output—especially under high RPM conditions. The VESRAH GG-3044-EX is a precision-manufactured replacement that restores OEM performance specifications without...09260063- SKU:
- 09260063
- Availability:
- Ships Same Business Day
- Weight:
- 0.07 LBS
- HEAD DIAMETER:
- 29,00 MM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- APPLICATION:
- EXHAUST
- LENGTH METRIC:
- 81.32 MM
- PRODUCT NAME:
- VALVE
- STEM DIAMETER METRIC:
- 5.00 MM
- HEAD DIAMETER METRIC:
- 29.00 MM
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
MSRP: $47.00Now: $44.65Was: $47.00 -
On Sale
VESRAH Exhaust Valve GG-1050-EX
VESRAH
MSRP: $41.83Now: $39.74Was: $41.83A worn or damaged exhaust valve compromises engine efficiency, increases emissions, and can lead to costly internal damage if ignored. The VESRAH Exhaust Valve GG-1050-EX delivers OEM-equivalent performance at a fraction of the cost, restoring proper...09260315- SKU:
- 09260315
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- HEAD DIAMETER:
- 20,50 MM
- UNITS:
- EACH
- HEAD DIAMETER METRIC:
- 20.50 MM
- LENGTH METRIC:
- 78.54 MM
- RIDING STYLE:
- OFF-ROAD
- STEM DIAMETER METRIC:
- 5.50 MM
- APPLICATION:
- EXHAUST
- PRODUCT NAME:
- VALVE
MSRP: $41.83Now: $39.74Was: $41.83Qty in Cart: 0Quantity:Price:MSRP: $41.83Now: $39.74Was: $41.83Subtotal: -
On Sale
VESRAH Top End Gasket Kit - TW 200 VG-6129-M
VESRAH
MSRP: $80.28Now: $76.27Was: $80.28A top-end rebuild demands precision gaskets that seal consistently under extreme combustion pressures—anything less risks compression loss and catastrophic engine failure. The VESRAH Top End Gasket Kit delivers OEM-equivalent sealing across all critical...VG6129M- SKU:
- VG6129M
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- TYPE:
- TOP END
- UNITS:
- SET
MSRP: $80.28Now: $76.27Was: $80.28Qty in Cart: 0Quantity:Price:MSRP: $80.28Now: $76.27Was: $80.28Subtotal: -
On Sale
VESRAH Top End Gasket Kit - YZ 125 VG-6138
VESRAH
MSRP: $41.93Now: $39.83Was: $41.93A top-end rebuild demands precision gaskets that seal consistently under extreme combustion pressures—compromising here means risking blow-by, oil leakage, and lost performance. The VESRAH VG-6138 gasket kit gives you every component needed for a...VG6138- SKU:
- VG6138
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- UNITS:
- SET
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
MSRP: $41.93Now: $39.83Was: $41.93 -
On Sale
VESRAH Top End Gasket Kit - Yamaha 500 VG-674
VESRAH
MSRP: $55.67Now: $52.89Was: $55.67Engine gasket failure is one of the most common causes of performance loss and reliability issues in rebuilt engines. The VESRAH VG-674 Top End Gasket Kit ensures proper sealing across all critical combustion chamber interfaces, preventing blow-by and...VG674- SKU:
- VG674
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- SET
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
MSRP: $55.67Now: $52.89Was: $55.67 -
On Sale
VESRAH Complete Gasket Kit - CT90 VG-168
VESRAH
MSRP: $35.95Now: $34.15Was: $35.95A failed gasket can sideline your engine and drain your wallet fast. This complete gasket kit eliminates guesswork during rebuilds by delivering every seal, o-ring, and gasket you need in one package—saving time and preventing costly comebacks. Whether...VG168- SKU:
- VG168
- Availability:
- Ships Same Business Day
- Weight:
- 0.38 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- PRODUCT NAME:
- GASKET
- UNITS:
- SET
MSRP: $35.95Now: $34.15Was: $35.95Qty in Cart: 0Quantity:Price:MSRP: $35.95Now: $34.15Was: $35.95Subtotal: -
On Sale
VESRAH Complete Gasket Kit - XL250S VG-185
VESRAH
MSRP: $87.40Now: $83.03Was: $87.40A complete engine rebuild demands precision gaskets that seal reliably under extreme combustion pressures—this VESRAH kit eliminates the risk of hunting down individual components and guarantees compatibility across your entire engine. Whether you're...VG185- SKU:
- VG185
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- TYPE:
- COMPLETE
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- UNITS:
- SET
MSRP: $87.40Now: $83.03Was: $87.40 -
On Sale
VESRAH Complete Gasket Kit - XR 500 VG-187
VESRAH
MSRP: $78.95Now: $75.00Was: $78.95Engine gasket failure compromises compression, causes coolant and oil leaks, and can lead to catastrophic engine damage if left unaddressed. The VESRAH Complete Gasket Kit VG-187 supplies every gasket, o-ring, and valve guide oil seal needed for a full...VG187- SKU:
- VG187
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- SET
- PRODUCT NAME:
- GASKET
MSRP: $78.95Now: $75.00Was: $78.95 -
On Sale
VESRAH Complete Gasket Kit - Honda 125 VG-189
VESRAH
MSRP: $60.95Now: $57.90Was: $60.95Engine rebuilds demand precision—every gasket, seal, and o-ring must perform flawlessly under pressure. The VESRAH Complete Gasket Kit VG-189 eliminates the guesswork by bundling all essential sealing components into a single, comprehensive package...VG189- SKU:
- VG189
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- UNITS:
- SET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
MSRP: $60.95Now: $57.90Was: $60.95Qty in Cart: 0Quantity:Price:MSRP: $60.95Now: $57.90Was: $60.95Subtotal: -
On Sale
VESRAH Complete Gasket Kit - Honda 200 VG-191
VESRAH
MSRP: $52.95Now: $50.30Was: $52.95A complete engine rebuild demands precision gasket selection—cutting corners here leads to oil leaks, compression loss, and catastrophic engine failure. The VESRAH VG-191 eliminates guesswork by bundling every gasket and seal your Honda 200 engine needs...VG191- SKU:
- VG191
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- SET
- PRODUCT NAME:
- GASKET
MSRP: $52.95Now: $50.30Was: $52.95 -
On Sale
VESRAH Complete Gasket Kit - XL/R185 VG-192
VESRAH
MSRP: $61.93Now: $58.83Was: $61.93A complete engine rebuild demands precision sealing at every critical junction—and this VESRAH gasket kit eliminates the guesswork by providing all necessary components in one purchase. Whether you're restoring a top-end or tackling a full overhaul,...VG192- SKU:
- VG192
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- PRODUCT NAME:
- GASKET
- UNITS:
- SET
MSRP: $61.93Now: $58.83Was: $61.93Qty in Cart: 0Quantity:Price:MSRP: $61.93Now: $58.83Was: $61.93Subtotal: -
On Sale
VESRAH Complete Gasket Kit - RM125 VG-361
VESRAH
MSRP: $53.31Now: $50.64Was: $53.31A complete engine rebuild demands precision gaskets that seal under extreme pressure and temperature cycling—factory gaskets degrade over time, leading to compression loss and fluid leakage that compromises performance. The VESRAH Complete Gasket Kit...VG361- SKU:
- VG361
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- SET
MSRP: $53.31Now: $50.64Was: $53.31Qty in Cart: 0Quantity:Price:MSRP: $53.31Now: $50.64Was: $53.31Subtotal: -
On Sale
VESRAH Complete Gasket Kit - DS80 VG-371
VESRAH
MSRP: $32.42Now: $30.80Was: $32.42A complete engine rebuild demands precision sealing at every junction—and this VESRAH gasket kit delivers all the components you need in one package. Whether you're doing a full top-to-bottom rebuild or addressing multiple leak points, having the correct...VG371- SKU:
- VG371
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- UNITS:
- SET
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- TYPE:
- COMPLETE
MSRP: $32.42Now: $30.80Was: $32.42Qty in Cart: 0Quantity:Price:MSRP: $32.42Now: $30.80Was: $32.42Subtotal:
