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
-
MOOSE RACING Motor Gasket Kit with Seal - CR125 811232
MOOSE RACING
$91.46A complete engine and transmission rebuild demands precision gaskets and seals—factory tolerances won't tolerate improvisation. The MOOSE RACING Motor Gasket Kit delivers OEM-equivalent performance at a fraction of dealership pricing, giving you the...M811232- SKU:
- M811232
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- PRODUCT NAME:
- GASKET
- TYPE:
- ENGINE
- UNITS:
- KIT
$91.46 -
MOOSE RACING Motor Gasket Kit with Seal - CR125 811233
MOOSE RACING
$99.86A complete engine and transmission rebuild requires gaskets and seals that won't fail under load. The MOOSE RACING Motor Gasket Kit eliminates the frustration of sourcing individual components from multiple suppliers while maintaining OEM-level fit and...M811233- SKU:
- M811233
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- TYPE:
- ENGINE
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
$99.86Qty in Cart: 0Quantity:Price:$99.86Subtotal: -
MOOSE RACING Motor Gasket Kit with Seal - YZ250 811663
MOOSE RACING
$68.97A complete engine and transmission rebuild demands precision gaskets and seals that won't compromise your work or your wallet. This MOOSE RACING Motor Gasket Kit delivers OEM-quality components at a fraction of dealer pricing, letting you rebuild with...M811663- SKU:
- M811663
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- UNITS:
- KIT
- TYPE:
- ENGINE
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
$68.97 -
MOOSE RACING Motor Gasket Kit with Seal - YZ250 811664
MOOSE RACING
$68.97A complete engine and transmission rebuild demands precision gaskets and seals that won't compromise your work—and OEM replacements drain your budget fast. The MOOSE RACING Motor Gasket Kit delivers genuine OEM-quality seals at a fraction of the cost, so...M811664- SKU:
- M811664
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- TYPE:
- ENGINE
$68.97 -
MOOSE RACING Motor Gasket Kit with Seal - YZ250 811666
MOOSE RACING
$64.70A complete engine and transmission rebuild demands precision-fit gaskets and seals—and OEM pricing shouldn't dictate your budget. This Moose Racing Motor Gasket Kit delivers genuine OEM-quality components at a fraction of dealership cost, giving you the...M811666- SKU:
- M811666
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- TYPE:
- ENGINE
$64.70 -
MOOSE RACING Motor Gasket Kit with Seal - YZ250 811667
MOOSE RACING
$84.39A complete engine and transmission rebuild demands precision gaskets and seals that won't compromise your YZ250's reliability or performance. This Moose Racing kit eliminates the guesswork of sourcing individual components, giving you OEM-quality seals...M811667- SKU:
- M811667
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- TYPE:
- ENGINE
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- COMPLETE
$84.39 -
MOOSE RACING Motor Gasket Kit with Seal - YZ250 811668
MOOSE RACING
$81.65A complete engine and transmission rebuild demands OEM-quality gaskets and seals without the OEM price tag. This Moose Racing Motor Gasket Kit delivers genuine oil seals paired with precision-formed gaskets, ensuring a leak-free assembly and reliable...M811668- SKU:
- M811668
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- TYPE:
- ENGINE
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
$81.65 -
MOOSE RACING Motor Gasket Kit with Seal - YZ250 811669
MOOSE RACING
$80.18A complete engine and transmission rebuild demands precision components that won't compromise durability or break your budget. The MOOSE RACING Motor Gasket Kit eliminates the guesswork by bundling every gasket and seal your YZ250 needs in one...M811669- SKU:
- M811669
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- TYPE:
- ENGINE
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
$80.18 -
MOOSE RACING Top End Gasket Kit - CR125 810236
MOOSE RACING
$41.54When you're rebuilding a CR125 top end, precision gaskets and seals aren't optional—they're essential to engine integrity and reliability. This Moose Racing kit eliminates the guesswork by including every gasket, O-ring, and seal you need in one package,...M810236- SKU:
- M810236
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$41.54 -
MOOSE RACING Top End Gasket Kit - CR125R 810237
MOOSE RACING
$42.99A top-end rebuild demands precision gaskets and seals that won't fail mid-season—this Moose Racing kit delivers OEM-quality components at a fraction of dealership pricing. Whether you're refreshing a worn engine or upgrading compression, every gasket,...M810237- SKU:
- M810237
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- KIT
$42.99 -
MOOSE RACING Top End Gasket Kit - XR200 810240
MOOSE RACING
$49.88A top-end rebuild demands precision-fit gaskets and seals that won't compromise your engine's integrity or cost you a fortune. The MOOSE RACING Top End Gasket Kit delivers OEM-equivalent performance at a fraction of the price, with high-tech materials...M810240- SKU:
- M810240
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- KIT
$49.88 -
MOOSE RACING Top End Gasket Kit - CR450/480R 810270
MOOSE RACING
$23.33A top-end rebuild demands precision gaskets and seals that won't compromise engine integrity or leak under pressure. The MOOSE RACING Top End Gasket Kit eliminates guesswork with a complete, U.S.-manufactured set engineered specifically for the...M810270- SKU:
- M810270
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- KIT
$23.33 -
KIBBLEWHITE Intake Valve - Yamaha 80-80073T
KIBBLEWHITE
$92.51Intake valve performance directly impacts cylinder filling efficiency, combustion consistency, and overall engine responsiveness. The Kibblewhite Tensilite® valve engineered for your application uses aerospace-grade titanium and a specialized coating to...09262762- SKU:
- 09262762
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- HEAD DIAMETER METRIC:
- 23.00 MM
- STEM DIAMETER IMPERIAL:
- 0.1570'
- PRODUCT NAME:
- VALVE
- RIDING STYLE:
- OFF-ROAD
- TULIP ANGLE:
- 25°
- APPLICATION:
- INTAKE
- MATERIAL:
- TITANIUM
- MODEL:
- TENSILITE®
- UNITS:
- EACH
$92.51 -
KIBBLEWHITE Center Intake Valve - Yamaha 80-80075T
KIBBLEWHITE
$92.51Tensilite® intake valves deliver the reliability and thermal stability your engine demands during high-RPM operation. Precision CNC machining from titanium alloy forgings ensures consistent flow characteristics and extended valve life, while the CrN PVD...09262763- SKU:
- 09262763
- Availability:
- Ships Same Business Day
- Weight:
- 0.03 LBS
- HEAD DIAMETER METRIC:
- 23.00 MM
- RIDING STYLE:
- OFF-ROAD
- STEM DIAMETER IMPERIAL:
- 0.1570'
- TULIP ANGLE:
- 25°
- APPLICATION:
- CENTER INTAKE
- MATERIAL:
- TITANIUM
- MODEL:
- TENSILITE®
- UNITS:
- EACH
- PRODUCT NAME:
- VALVE
$92.51 -
KIBBLEWHITE Exhaust Valve - Yamaha 80-80077T
KIBBLEWHITE
$92.51Exhaust valves are critical components that directly impact engine efficiency, durability, and peak performance—and they're exposed to extreme temperatures and repeated impact that demand material science beyond standard steel. The KIBBLEWHITE Tensilite®...09262764- SKU:
- 09262764
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- RIDING STYLE:
- OFF-ROAD
- HEAD DIAMETER METRIC:
- 24.50 MM
- MODEL:
- TENSILITE®
- TULIP ANGLE:
- 25°
- APPLICATION:
- EXHAUST
- PRODUCT NAME:
- VALVE
- STEM DIAMETER IMPERIAL:
- 0.1758'
- MATERIAL:
- TITANIUM
- UNITS:
- EACH
$92.51 -
KIBBLEWHITE Intake Valve - Yamaha 80-80213T
KIBBLEWHITE
$92.51Intake valve performance directly impacts your engine's breathing efficiency, combustion consistency, and overall power output. The Kibblewhite Tensilite® valve combines aerospace-grade titanium with precision CNC machining to deliver superior durability...09262765- SKU:
- 09262765
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- APPLICATION:
- INTAKE
- RIDING STYLE:
- OFF-ROAD
- TULIP ANGLE:
- 15°
- UNITS:
- EACH
- MODEL:
- TENSILITE®
- STEM DIAMETER IMPERIAL:
- 0.1765'
- MATERIAL:
- TITANIUM
- HEAD DIAMETER METRIC:
- 27.00 MM
- PRODUCT NAME:
- VALVE
$92.51 -
KIBBLEWHITE Center Intake Valve - Yamaha 80-80215T
KIBBLEWHITE
$92.51Intake valve performance directly impacts combustion efficiency, cylinder sealing, and overall engine reliability—especially under sustained high RPM operation. The KIBBLEWHITE Tensilite® Center Intake Valve delivers the material science and precision...09262766- SKU:
- 09262766
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- HEAD DIAMETER METRIC:
- 27.00 MM
- PRODUCT NAME:
- VALVE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- APPLICATION:
- CENTER INTAKE
- MODEL:
- TENSILITE®
- TULIP ANGLE:
- 15°
- MATERIAL:
- TITANIUM
- STEM DIAMETER IMPERIAL:
- 0.1765'
$92.51 -
KIBBLEWHITE Exhaust Valve - Yamaha 80-80217T
KIBBLEWHITE
$92.51Exhaust valves are critical to engine reliability and peak performance—especially under high-RPM and high-heat conditions where material failure becomes a real risk. The KIBBLEWHITE Tensilite® valve delivers the durability and thermal stability you need...09262767- SKU:
- 09262767
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- HEAD DIAMETER METRIC:
- 28.00 MM
- PRODUCT NAME:
- VALVE
- TULIP ANGLE:
- 20°
- UNITS:
- EACH
- MATERIAL:
- TITANIUM
- MODEL:
- TENSILITE®
- RIDING STYLE:
- OFF-ROAD
- STEM DIAMETER IMPERIAL:
- 0.1957'
- APPLICATION:
- EXHAUST
$92.51Qty in Cart: 0Quantity:Price:$92.51Subtotal: -
KIBBLEWHITE Intake Valve - Yamaha 80-80762T
KIBBLEWHITE
$109.33Precision intake flow depends on valve quality, and Kibblewhite's Tensilite® valves are engineered to deliver exact tolerances and superior durability under extreme combustion pressures. The CrN PVD coating reduces friction loss while resisting impact...09262768- SKU:
- 09262768
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- HEAD DIAMETER METRIC:
- 36.00 MM
- PRODUCT NAME:
- VALVE
- STEM DIAMETER IMPERIAL:
- 0.2160'
- MATERIAL:
- TITANIUM
- APPLICATION:
- INTAKE
- MODEL:
- TENSILITE®
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- TULIP ANGLE:
- 20°
$109.33 -
KIBBLEWHITE Intake Valve - Yamaha 80-80872T
KIBBLEWHITE
$109.33Intake valve performance directly impacts cylinder filling efficiency and combustion consistency—two critical factors that separate competitive engines from the rest. KIBBLEWHITE's Tensilite® valves are precision-forged from premium titanium alloy and...09262770- SKU:
- 09262770
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- APPLICATION:
- INTAKE
- HEAD DIAMETER METRIC:
- 37.00 MM
- RIDING STYLE:
- OFF-ROAD
- MODEL:
- TENSILITE®
- TULIP ANGLE:
- 18°
- MATERIAL:
- TITANIUM
- STEM DIAMETER IMPERIAL:
- 0.2160'
- UNITS:
- EACH
- PRODUCT NAME:
- VALVE
$109.33
