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!
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- Price
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KIBBLEWHITE Intake Valve - Honda 30-31162T
KIBBLEWHITE
$92.51Tensilite® valves are CNC machined from one-piece forgings of 6AL4V or 6-2-4-2 titanium alloy, Finished with a CrN PVD coating that has a low coefficient of friction, and is impact, abrasion, and corrosion resistant, Made in the U.S.A.09262741- SKU:
- 09262741
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- APPLICATION:
- INTAKE
- PRODUCT NAME:
- VALVE
- TULIP ANGLE:
- 20°
- UNITS:
- EACH
- MATERIAL:
- TITANIUM
- MODEL:
- TENSILITE®
- STEM DIAMETER IMPERIAL:
- 0.1960'
- HEAD DIAMETER METRIC:
- 31.00 MM
- RIDING STYLE:
- OFF-ROAD
$92.51 -
KIBBLEWHITE Intake Valve - Honda 30-31462T
KIBBLEWHITE
$109.33Tensilite® valves are CNC machined from one-piece forgings of 6AL4V or 6-2-4-2 titanium alloy, Finished with a CrN PVD coating that has a low coefficient of friction, and is impact, abrasion, and corrosion resistant, Made in the U.S.A.09262742- SKU:
- 09262742
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- APPLICATION:
- INTAKE
- HEAD DIAMETER METRIC:
- 30.50 MM
- PRODUCT NAME:
- VALVE
- TULIP ANGLE:
- 20°
- UNITS:
- EACH
- MATERIAL:
- TITANIUM
- RIDING STYLE:
- OFF-ROAD
- MODEL:
- TENSILITE®
- STEM DIAMETER IMPERIAL:
- 0.1960'
$109.33 -
KIBBLEWHITE Intake Valve - Kawasaki 40-40140T
KIBBLEWHITE
$92.51Tensilite® valves are CNC machined from one-piece forgings of 6AL4V or 6-2-4-2 titanium alloy, Finished with a CrN PVD coating that has a low coefficient of friction, and is impact, abrasion, and corrosion resistant, Made in the U.S.A.09262746- SKU:
- 09262746
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- RIDING STYLE:
- OFF-ROAD
- HEAD DIAMETER METRIC:
- 31.00 MM
- MODEL:
- TENSILITE®
- STEM DIAMETER IMPERIAL:
- 0.1765'
- APPLICATION:
- INTAKE
- MATERIAL:
- TITANIUM
- UNITS:
- EACH
- PRODUCT NAME:
- VALVE
- TULIP ANGLE:
- 20°
$92.51 -
KIBBLEWHITE Exhaust Valve - Kawasaki 40-40143T
KIBBLEWHITE
$92.51Tensilite® valves are CNC machined from one-piece forgings of 6AL4V or 6-2-4-2 titanium alloy, Finished with a CrN PVD coating that has a low coefficient of friction, and is impact, abrasion, and corrosion resistant, Made in the U.S.A.09262747- SKU:
- 09262747
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- STEM DIAMETER IMPERIAL:
- 0.1756'
- APPLICATION:
- EXHAUST
- PRODUCT NAME:
- VALVE
- RIDING STYLE:
- OFF-ROAD
- TULIP ANGLE:
- 25°
- HEAD DIAMETER METRIC:
- 25.00 MM
- MATERIAL:
- TITANIUM
- MODEL:
- TENSILITE®
- UNITS:
- EACH
$92.51 -
KIBBLEWHITE Exhaust Valve - KTM 96-96166T
KIBBLEWHITE
$100.95Tensilite® valves are CNC machined from one-piece forgings of 6AL4V or 6-2-4-2 titanium alloy, Finished with a CrN PVD coating that has a low coefficient of friction, and is impact, abrasion, and corrosion resistant, Made in the U.S.A.09262753- SKU:
- 09262753
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- APPLICATION:
- EXHAUST
- PRODUCT NAME:
- VALVE
- UNITS:
- EACH
- MATERIAL:
- TITANIUM
- TULIP ANGLE:
- 30°
- HEAD DIAMETER METRIC:
- 31.70 MM
- MODEL:
- TENSILITE®
- STEM DIAMETER IMPERIAL:
- 0.2353'
- RIDING STYLE:
- OFF-ROAD
$100.95 -
KIBBLEWHITE Intake Valve - KTM 96-96212T
KIBBLEWHITE
$134.56Tensilite® valves are CNC machined from one-piece forgings of 6AL4V or 6-2-4-2 titanium alloy, Finished with a CrN PVD coating that has a low coefficient of friction, and is impact, abrasion, and corrosion resistant, Made in the U.S.A.09262754- SKU:
- 09262754
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- HEAD DIAMETER METRIC:
- 39.95 MM
- RIDING STYLE:
- OFF-ROAD
- STEM DIAMETER IMPERIAL:
- 0.2350'
- TULIP ANGLE:
- 15°
- PRODUCT NAME:
- VALVE
- APPLICATION:
- INTAKE
- MATERIAL:
- TITANIUM
- MODEL:
- TENSILITE®
- UNITS:
- EACH
$134.56 -
KIBBLEWHITE Intake Valve - Suzuki 60-60210T
KIBBLEWHITE
$92.51Tensilite® valves are CNC machined from one-piece forgings of 6AL4V or 6-2-4-2 titanium alloy, Finished with a CrN PVD coating that has a low coefficient of friction, and is impact, abrasion, and corrosion resistant, Made in the U.S.A.09262756- SKU:
- 09262756
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- HEAD DIAMETER METRIC:
- 31.00 MM
- MODEL:
- TENSILITE®
- STEM DIAMETER IMPERIAL:
- 0.1765'
- APPLICATION:
- INTAKE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- PRODUCT NAME:
- VALVE
- TULIP ANGLE:
- 20°
- MATERIAL:
- TITANIUM
$92.51 -
KIBBLEWHITE Exhaust Valve - Suzuki 60-60213T
KIBBLEWHITE
$92.51Tensilite® valves are CNC machined from one-piece forgings of 6AL4V or 6-2-4-2 titanium alloy, Finished with a CrN PVD coating that has a low coefficient of friction, and is impact, abrasion, and corrosion resistant, Made in the U.S.A.09262757- SKU:
- 09262757
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- MODEL:
- TENSILITE®
- TULIP ANGLE:
- 25°
- HEAD DIAMETER METRIC:
- 25.00 MM
- RIDING STYLE:
- OFF-ROAD
- STEM DIAMETER IMPERIAL:
- 0.1756'
- MATERIAL:
- TITANIUM
- UNITS:
- EACH
- APPLICATION:
- EXHAUST
- PRODUCT NAME:
- VALVE
$92.51 -
KIBBLEWHITE Exhaust Valve - Suzuki 60-60516T
KIBBLEWHITE
$109.33Tensilite® valves are CNC machined from one-piece forgings of 6AL4V or 6-2-4-2 titanium alloy, Finished with a CrN PVD coating that has a low coefficient of friction, and is impact, abrasion, and corrosion resistant, Made in the U.S.A.09262759- SKU:
- 09262759
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- MATERIAL:
- TITANIUM
- STEM DIAMETER IMPERIAL:
- 0.1760'
- HEAD DIAMETER METRIC:
- 25.00 MM
- PRODUCT NAME:
- VALVE
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- TULIP ANGLE:
- 25°
- APPLICATION:
- EXHAUST
- MODEL:
- TENSILITE®
$109.33 -
KIBBLEWHITE Intake Valve - Suzuki 60-60712T
KIBBLEWHITE
$109.33Tensilite® valves are CNC machined from one-piece forgings of 6AL4V or 6-2-4-2 titanium alloy, Finished with a CrN PVD coating that has a low coefficient of friction, and is impact, abrasion, and corrosion resistant, Made in the U.S.A.09262760- SKU:
- 09262760
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- MATERIAL:
- TITANIUM
- APPLICATION:
- INTAKE
- PRODUCT NAME:
- VALVE
- TULIP ANGLE:
- 20°
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- HEAD DIAMETER METRIC:
- 36.00 MM
- MODEL:
- TENSILITE®
- STEM DIAMETER IMPERIAL:
- 0.2155'
$109.33 -
JE PISTONS Piston Kit 291517
JE PISTONS
$309.99Machined from 2618-T6 high-tensile forged aluminum, Dome/dish features smooth flowing radii; requires no deburring or preparation, Specifically engineered for extreme applications including professional competition, Pro Series pistons available for...09105905- SKU:
- 09105905
- Availability:
- Ships Same Business Day
- Weight:
- 0.65 LBS
- BORE SIZE METRIC:
- 76.80 MM
- COMPRESSION RATIO IMPERIAL:
- 14.2:1
- BORE - OVERSIZE METRIC:
- STANDARD
- PISTON HEAD SHAPE:
- DOMED
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- DISPLACEMENT:
- 249 CC
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- PRODUCT NAME:
- PISTON KIT
- TYPE:
- FORGED SIDE RELIEF DESIGN
- BORE - OVERSIZE:
- STANDARD
- STYLE:
- PRO SERIES
$309.99 -
JE PISTONS Piston Kit 292330
JE PISTONS
$269.99Machined from 2618-T6 high-tensile forged aluminum, Dome/dish features smooth flowing radii; requires no deburring or preparation, Specifically engineered for extreme applications including professional competition, Pro Series pistons available for...09105906- SKU:
- 09105906
- Availability:
- Ships Same Business Day
- Weight:
- 1.51 LBS
- BORE - OVERSIZE:
- +1,00 MM
- PRODUCT NAME:
- PISTON KIT
- COMPRESSION RATIO IMPERIAL:
- 9.0:1
- PISTON HEAD SHAPE:
- FLAT TOP
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- STYLE:
- JE PISTON
- BORE - OVERSIZE METRIC:
- +1.00 MM
- TYPE:
- ROUND FORGED DESIGN
- UNITS:
- KIT
- BORE SIZE METRIC:
- 101.00 MM
- DISPLACEMENT:
- 650 CC
- RIDING STYLE:
- OFF-ROAD
$269.99 -
JE PISTONS Piston Kit 299245
JE PISTONS
$309.99Machined from 2618-T6 high-tensile forged aluminum, Dome/dish features smooth flowing radii; requires no deburring or preparation, Specifically engineered for extreme applications including professional competition, Pro Series pistons available for...09105908- SKU:
- 09105908
- Availability:
- Ships Same Business Day
- Weight:
- 1.36 LBS
- BORE - OVERSIZE METRIC:
- STANDARD
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- BORE - OVERSIZE:
- STANDARD
- DISPLACEMENT:
- 249 CC
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- PRODUCT NAME:
- PISTON KIT
- STYLE:
- PRO SERIES
- BORE SIZE METRIC:
- 77.00 MM
- COMPRESSION RATIO IMPERIAL:
- 14.2:1
- PISTON HEAD SHAPE:
- DOMED
- TYPE:
- FORGED SIDE RELIEF DESIGN
$309.99 -
JE PISTONS Piston Kit 300275
JE PISTONS
$269.99Machined from 2618-T6 high-tensile forged aluminum, Dome/dish features smooth flowing radii; requires no deburring or preparation, Specifically engineered for extreme applications including professional competition, Pro Series pistons available for...09105912- SKU:
- 09105912
- Availability:
- Ships Same Business Day
- Weight:
- 1.50 LBS
- BORE - OVERSIZE METRIC:
- STANDARD
- DISPLACEMENT:
- 644 CC
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- BORE - OVERSIZE:
- STANDARD
- PRODUCT NAME:
- PISTON KIT
- BORE SIZE METRIC:
- 100.00 MM
- RIDING STYLE:
- OFF-ROAD
- COMPRESSION RATIO IMPERIAL:
- 10.5:1
- PISTON HEAD SHAPE:
- FLAT TOP
- STYLE:
- JE PISTON
- TYPE:
- ROUND FORGED DESIGN
- UNITS:
- KIT
$269.99 -
JE PISTONS Piston Kit 300276
JE PISTONS
$269.99Machined from 2618-T6 high-tensile forged aluminum, Dome/dish features smooth flowing radii; requires no deburring or preparation, Specifically engineered for extreme applications including professional competition, Pro Series pistons available for...09105913- SKU:
- 09105913
- Availability:
- Ships Same Business Day
- Weight:
- 1.36 LBS
- DISPLACEMENT:
- 650 CC
- RIDING STYLE:
- OFF-ROAD
- BORE - OVERSIZE METRIC:
- +1.00 MM
- BORE SIZE METRIC:
- 101.00 MM
- TYPE:
- ROUND FORGED DESIGN
- UNITS:
- KIT
- COMPRESSION RATIO IMPERIAL:
- 10.5:1
- PISTON HEAD SHAPE:
- FLAT TOP
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- STYLE:
- JE PISTON
- BORE - OVERSIZE:
- +1,00 MM
- PRODUCT NAME:
- PISTON KIT
$269.99 -
Cylinder Works Standard Bore Gasket Kit for Honda CRF450R 2017-2019 810989
CYLINDER WORKS
$72.74Enhance the performance of your engine with the CYLINDER WORKS Gasket Kit Standard Bore 810989. Proudly made in the U.S.A., this high-quality gasket kit ensures a perfect fit and reliable sealing for optimal engine efficiency. Designed for durability and...09346003- SKU:
- 09346003
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- TYPE:
- CYLINDER
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- STANDARD
- PRODUCT NAME:
- GASKET KIT
$72.74 -
Cylinder Works Big Bore Gasket Kit for Honda CRF250R 2018-2019 CW11011G01
CYLINDER WORKS
$66.95Enhance the performance of your Honda with the CYLINDER WORKS Gasket Kit Big Bore. Designed and manufactured in the U.S.A., this premium gasket kit ensures a perfect fit and optimal sealing for your engine, allowing for improved efficiency and power...09346344- SKU:
- 09346344
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CYLINDER BASE
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- OVERSIZE (+3.00 MM)
- TYPE:
- CYLINDER HEAD
$66.95 -
Cylinder Works Big Bore Gasket Kit Yamaha YZ450F 2018-2019 CW21012G01
CYLINDER WORKS
$99.95Upgrade your engine's performance with the CYLINDER WORKS Gasket Kit Big Bore CW21012G01, proudly made in the U.S.A. This high-quality gasket kit is designed specifically for big bore applications, ensuring optimal sealing and durability. Experience...09346345- SKU:
- 09346345
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 LBS
- BORE SIZE IMPERIAL:
- OVERSIZE (+2.00 MM)
- PRODUCT NAME:
- GASKET
- TYPE:
- CYLINDER BASE
- TYPE:
- CYLINDER HEAD
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
- ENGINE TYPE:
- 4-STROKE
$99.95 -
Cylinder Works Standard Bore Cylinder Yamaha YZ250F 2014-2018 20010
CYLINDER WORKS
$402.95Experience unparalleled performance with the CYLINDER WORKS Cylinder Standard 20010, a direct bolt-on solution that seamlessly integrates with your existing setup. Engineered for durability and efficiency, this cylinder is designed to meet the highest...09310579- SKU:
- 09310579
- Availability:
- Ships Same Business Day
- Weight:
- 2.60 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- COMPRESSION RATIO IMPERIAL:
- 13.5:1
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- CYLINDER DIAMETER:
- 77,00 MM
- DISPLACEMENT:
- 249 CC
- ENGINE TYPE:
- 4-CYCLE
- PRODUCT NAME:
- CYLINDER
- CYLINDER DIAMETER METRIC:
- 77.00 MM
- OVERBORE METRIC:
- STANDARD
- STYLE:
- STANDARD
$402.95 -
Cylinder Works Big Bore Cylinder Kit for 2015-2023 Kawasaki KVF750 Brute Force 4x4i 860cc 31007-K02
CYLINDER WORKS
$564.95Enhance your engine's performance with the CYLINDER WORKS Big Bore Cylinder Kit. This ready-to-install kit offers a seamless fit, allowing you to upgrade without the need for complex machine work. Crafted in the U.S.A., it combines durability and...09310583- SKU:
- 09310583
- Availability:
- Ships Same Business Day
- Weight:
- 3.55 LBS
- DISPLACEMENT:
- 249 CC
- ENGINE TYPE:
- 4-CYCLE
- CYLINDER DIAMETER:
- 76,80 MM
- STYLE:
- STANDARD
- CYLINDER DIAMETER METRIC:
- 76.80 MM
- RIDING STYLE:
- OFF-ROAD
- COMPRESSION RATIO IMPERIAL:
- 13.5:1
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- PRODUCT NAME:
- CYLINDER KIT
- UNITS:
- KIT
$564.95
