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
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ProFilter Oil Filter for 2004-2024 Honda CRF150R PF-116
PRO FILTER
$6.99Regular oil changes are critical to engine longevity, but only if you're using a filter that actually protects your engine. The ProFilter PF-116 delivers superior filtration and flow rates that keep...07120241- SKU:
- 07120241
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- FILTER MEDIA MATERIAL:
- PAPER
- UNITS:
- EACH
- COLOR/FINISH:
- YELLOW
- STYLE:
- STANDARD
- BASE COLOR:
- YELLOW
- PRODUCT NAME:
- OIL FILTER
- RIDING STYLE:
- OFF-ROAD
$6.99Qty in Cart: 0Quantity:Price:$6.99Subtotal: -
Pro Filter 2003-2005 KTM 250 EXC Oil Filter PF-157
PRO FILTER
$6.99Keep your KTM 250 EXC's engine running clean and efficient with the PRO FILTER PF-157, a high-performance replacement oil filter that exceeds OEM specifications. Proper filtration is critical for...07120245- SKU:
- 07120245
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- BASE COLOR:
- YELLOW
- FILTER MEDIA MATERIAL:
- PAPER
- PRODUCT NAME:
- OIL FILTER
- RIDING STYLE:
- STREET
- RIDING STYLE:
- UTV
- STYLE:
- SHORT
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- COLOR/FINISH:
- YELLOW
$6.99 -
TMV Oil Plug - Blue - Yamaha 310OP501BU
TMV
$29.95A quality oil drain plug isn't just a bolt—it's your first line of defense against leaks and contamination. The TMV Oil Plug delivers precision engineering with machined 6061 T-6 aluminum...09500293- SKU:
- 09500293
- Availability:
- Ships Same Business Day
- Weight:
- 0.03 LBS
- TYPE:
- OIL
- COLOR/FINISH:
- BLUE
- RIDING STYLE:
- OFF-ROAD
- BASE COLOR:
- BLUE
- MATERIAL:
- 6061 ALUMINUM
- PRODUCT NAME:
- PLUG
- UNITS:
- EACH
$29.95Qty in Cart: 0Quantity:Price:$29.95Subtotal: -
MOOSE RACING Motor Gasket Kit with Seal - KX500 811474
MOOSE RACING
$73.14A complete engine and transmission rebuild demands precision-fit gaskets and seals—OEM quality without the OEM price tag. This Moose Racing kit eliminates the frustration of sourcing individual...M811474- SKU:
- M811474
- Availability:
- Ships Same Business Day
- Weight:
- 0.32 LBS
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- TYPE:
- ENGINE
$73.14 -
MOOSE RACING Motor Gasket Kit with Seal - YZ250 811665
MOOSE RACING
$68.97A complete engine and transmission rebuild demands OEM-quality gaskets and seals, but OEM pricing shouldn't break your budget. The MOOSE RACING Motor Gasket Kit delivers genuine replacement seals and...M811665- SKU:
- M811665
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- TYPE:
- ENGINE
$68.97 -
MOOSE RACING Top End Gasket Kit - XR200 810241
MOOSE RACING
$20.15A top-end rebuild demands precision-fit gaskets and seals that won't compromise engine integrity or cost you a fortune. The MOOSE RACING Top End Gasket Kit gives you OEM-quality components at a...M810241- SKU:
- M810241
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$20.15Qty in Cart: 0Quantity:Price:$20.15Subtotal: -
MOOSE RACING Top End Gasket Kit - CR250R 810250
MOOSE RACING
$23.33A top-end rebuild demands precision—gasket failure compromises compression, causes oil weeping, and tanks performance. The MOOSE RACING Top End Gasket Kit delivers OEM-quality seals at a fraction of...M810250- SKU:
- M810250
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- KIT
$23.33Qty in Cart: 0Quantity:Price:$23.33Subtotal: -
KIBBLEWHITE Exhaust Valve - Suzuki 60-60718T
KIBBLEWHITE
$109.33Exhaust valves are a critical wear item in high-revving engines, and OEM replacements often can't keep pace with sustained performance demands. The KIBBLEWHITE Tensilite® exhaust valve combines...09262761- SKU:
- 09262761
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- MATERIAL:
- TITANIUM
- APPLICATION:
- EXHAUST
- PRODUCT NAME:
- VALVE
- STEM DIAMETER IMPERIAL:
- 0.2150'
- TULIP ANGLE:
- 20°
- MODEL:
- TENSILITE®
- UNITS:
- EACH
- HEAD DIAMETER METRIC:
- 31.00 MM
- RIDING STYLE:
- OFF-ROAD
$109.33 -
KIBBLEWHITE Exhaust Valve - Yamaha 80-80766T
KIBBLEWHITE
$109.33Exhaust valves are critical to cylinder head integrity and engine performance—they're subject to extreme thermal cycling, combustion pressures, and chemical corrosion that standard steel simply can't...09262769- SKU:
- 09262769
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- APPLICATION:
- EXHAUST
- STEM DIAMETER IMPERIAL:
- 0.2155'
- PRODUCT NAME:
- VALVE
- RIDING STYLE:
- OFF-ROAD
- TULIP ANGLE:
- 20°
- HEAD DIAMETER METRIC:
- 30.00 MM
- MATERIAL:
- TITANIUM
- MODEL:
- TENSILITE®
- UNITS:
- EACH
$109.33Qty in Cart: 0Quantity:Price:$109.33Subtotal: -
KIBBLEWHITE Valve Guide Seal - Intake/Exhaust 71040-4
KIBBLEWHITE
$13.96Valve guide seals are critical to preventing oil from seeping into your combustion chambers—a common source of blue smoke, carbon buildup, and lost performance. The KIBBLEWHITE 71040-4 uses Viton...09263100- SKU:
- 09263100
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- APPLICATION:
- EXHAUST
- PRODUCT NAME:
- SEAL
- STEM DIAMETER IMPERIAL:
- 0.333'
- OUTSIDE DIAMETER IMPERIAL:
- 0.4550'
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- INTAKE
- TYPE:
- VALVE GUIDE
- MATERIAL:
- VITON
- UNITS:
- 4 PACK
$13.96 -
Cylinder Works Big Bore Cylinder Kit 2020-2022 KTM 350 EXC-F CW51008K01
CYLINDER WORKS
$885.95Elevate your engine's performance with the CYLINDER WORKS Big Bore Cylinder Kit CW51008K01. Designed for seamless installation, this kit provides an exceptional upgrade over OEM cylinders, enhancing...09310967- SKU:
- 09310967
- Availability:
- Ships Same Business Day
- Weight:
- 4.60 LBS
- OVERBORE IMPERIAL:
- +2.00 MM
- COMPRESSION RATIO IMPERIAL:
- 14.0:1
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- CYLINDER DIAMETER:
- 90,00 MM
- PRODUCT NAME:
- CYLINDER KIT
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- BIG BORE
- UNITS:
- KIT
- CYLINDER DIAMETER METRIC:
- 90.00 MM
- DISPLACEMENT:
- 366 CC
- ENGINE TYPE:
- 4-CYCLE
- RIDING STYLE:
- STREET
$885.95Qty in Cart: 0Quantity:Price:$885.95Subtotal: -
Cylinder Works Standard Bore Cylinder KTM 65 SX 2009-2022 50005
CYLINDER WORKS
$631.95Upgrade your engine with the Cylinder Works Standard 50005, a high-performance, ready-to-install direct bolt-on cylinder. Engineered for durability and precision, this cylinder offers a seamless fit...09311015- SKU:
- 09311015
- Availability:
- Ships Same Business Day
- Weight:
- 2.51 LBS
- ENGINE TYPE:
- 2-CYCLE
- STYLE:
- STANDARD
- CYLINDER DIAMETER:
- 45,00 MM
- CYLINDER DIAMETER METRIC:
- 45.00 MM
- UNITS:
- EACH
- PRODUCT NAME:
- CYLINDER
- RIDING STYLE:
- OFF-ROAD
$631.95 -
Cylinder Works High Compression Cylinder Kit Yamaha YZ250F 2001-2007 20002-K01HC
CYLINDER WORKS
$750.95Elevate your engine's performance with the Cylinder Works High Compression Cylinder Kit. Designed for easy installation, this kit combines advanced engineering with premium materials to deliver...09310296- SKU:
- 09310296
- Availability:
- Ships Same Business Day
- Weight:
- 3.33 LBS
- DISPLACEMENT:
- 249 CC
- ENGINE TYPE:
- 4-CYCLE
- PRODUCT NAME:
- CYLINDER KIT
- STYLE:
- HIGH COMPRESSION
- COMPRESSION RATIO IMPERIAL:
- 13.5:1
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- CYLINDER DIAMETER:
- 77,00 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- CYLINDER DIAMETER METRIC:
- 77.00 MM
$750.95Qty in Cart: 0Quantity:Price:$750.95Subtotal: -
POWERSTANDS RACING Oil Cap Kit - Gold - M20 x 2.5 00-01311-23
POWERSTANDS RACING
$31.95CNC-machined from high-quality aluminum, E-clip is already safety wired to a mounting tab and the wire covered with silicon tubing that will not melt or discolor, Excellent resistance to extreme heat09500562- SKU:
- 09500562
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- COLOR/FINISH:
- ANODIZED
- COLOR/FINISH:
- GOLD
- PRODUCT NAME:
- CAP KIT
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- OIL FILLER
- RIDING STYLE:
- STREET
- DIAMETER - THREAD SIZE IMPERIAL:
- M20 X 2.5
- MATERIAL:
- ALUMINUM
$31.95 -
On Sale
Wiseco 75mm Ring Set for Honda TRX300 FourTrax 1988-2000 2953XC
WISECO
MSRP: $49.95Now: $42.00Was: $49.95If you're rebuilding or high-revving your Honda TRX300 FourTrax, worn piston rings are a silent killer—they'll tank your compression, spike blow-by, and rob you of power. The Wiseco 2953XC Ring Set...2953XC- SKU:
- 2953XC
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- DISPLACEMENT:
- 282 CC
- PISTON MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- PISTON RING
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- BORE SIZE METRIC:
- 75.00 MM
- DISPLACEMENT:
- 246 CC
- UNITS:
- SET
MSRP: $49.95Now: $42.00Was: $49.95Qty in Cart: 0Quantity:Price:MSRP: $49.95Now: $42.00Was: $49.95Subtotal: -
On Sale
WISECO Piston Kit - Kawasaki WK1061
WISECO
MSRP: $389.95Now: $331.00Was: $389.95A 2-cycle engine rebuild demands precision components that can withstand sustained high RPM loads and thermal stress. The Wiseco WK1061 piston kit eliminates the guesswork by bundling OEM-grade...WK1061- SKU:
- WK1061
- Availability:
- Ships Same Business Day
- Weight:
- 2.94 LBS
- DISPLACEMENT:
- 760 CC
- MODEL:
- FORGED SERIES
- SKIRT COATING:
- NON-COATED
- TYPE:
- TOP END
- UNITS:
- KIT
- BORE - OVERSIZE METRIC:
- +1.00 MM
- ENGINE TYPE:
- 2-STROKE
- PISTON DIAMETER METRIC:
- 80.89 MM
- BORE - OVERSIZE:
- +1,00 MM
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- RIDING STYLE:
- WATERCRAFT
- BORE SIZE METRIC:
- 81.00 MM
- PRODUCT NAME:
- REBUILD KIT
MSRP: $389.95Now: $331.00Was: $389.95Qty in Cart: 0Quantity:Price:MSRP: $389.95Now: $331.00Was: $389.95Subtotal: -
On Sale
Wiseco 66.5mm Piston Kit for 1979-1981 Yamaha DT175 471M06650
WISECO
MSRP: $162.95Now: $132.00Was: $162.95When your DT175's original piston wears out, you're facing either a seized engine or a complete rebuild—neither is cheap. The Wiseco 471M06650 delivers the durability and precision you need to...471M06650- SKU:
- 471M06650
- Availability:
- Ships Same Business Day
- Weight:
- 0.65 LBS
- MODEL:
- FORGED SERIES
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- SKIRT COATING:
- NON-COATED
- UNITS:
- KIT
- BORE - OVERSIZE:
- +0,50 MM
- ENGINE TYPE:
- 2-STROKE
- PISTON DIAMETER METRIC:
- 66.45 MM
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- PISTON KIT
- BORE - OVERSIZE METRIC:
- +0.50 MM
- BORE SIZE METRIC:
- 66.50 MM
- DISPLACEMENT:
- 172 CC
- STROKE LENGTH METRIC:
- 50.00 MM
MSRP: $162.95Now: $132.00Was: $162.95Qty in Cart: 0Quantity:Price:MSRP: $162.95Now: $132.00Was: $162.95Subtotal: -
On Sale
Wossner Piston Kit 66.36mm for Suzuki RM250 2000-2002 8059DC
WOSSNER
MSRP: $152.00Now: $144.40Was: $152.00The Wossner 8059DC piston kit delivers the durability and precision your RM250 demands when pushing peak RPM. Factory OEM pistons wear quickly under racing conditions—this German-engineered...09105497- SKU:
- 09105497
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- BORE - OVERSIZE:
- +0,02 MM
- DISPLACEMENT:
- 249 CC
- MODEL:
- STANDARD SERIES
- PRODUCT NAME:
- PISTON KIT
- TYPE:
- DUAL RING
- BORE - OVERSIZE METRIC:
- +0.02 MM
- BORE SIZE METRIC:
- 66.42 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- ENGINE TYPE:
- 2-STROKE
- PISTON SIZE METRIC:
- 66.36 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
MSRP: $152.00Now: $144.40Was: $152.00Qty in Cart: 0Quantity:Price:MSRP: $152.00Now: $144.40Was: $152.00Subtotal: -
On Sale
Wossner Piston Kit Kawasaki KX85 2001-2025 8082DA
WOSSNER
MSRP: $152.00Now: $144.40Was: $152.00If you're running a KX85 in competitive or high-mileage conditions, piston wear directly impacts throttle response, compression, and overall reliability. The Wossner 8082DA delivers the OEM...09105506- SKU:
- 09105506
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- BORE SIZE METRIC:
- 66.40 MM
- MODEL:
- STANDARD SERIES
- PISTON SIZE METRIC:
- 66.34 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- DISPLACEMENT:
- 249 CC
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- PISTON KIT
- TYPE:
- SINGLE RING
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
MSRP: $152.00Now: $144.40Was: $152.00Qty in Cart: 0Quantity:Price:MSRP: $152.00Now: $144.40Was: $152.00Subtotal: -
On Sale
Wossner Piston Kit 66.34mm Honda CR250R 1986-1996 8021DA
WOSSNER
MSRP: $152.00Now: $144.40Was: $152.00The CR250R demands a piston that can withstand the extreme thermal and mechanical stresses of 2-stroke performance. Wossner's 8021DA kit delivers the precision engineering and material science...09104727- SKU:
- 09104727
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- BORE SIZE METRIC:
- 66.40 MM
- PISTON SIZE METRIC:
- 66.34 MM
- BORE - OVERSIZE METRIC:
- STANDARD
- MODEL:
- STANDARD SERIES
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- DISPLACEMENT:
- 249 CC
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- PISTON KIT
- TYPE:
- DUAL RING
- BORE - OVERSIZE:
- STANDARD
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
MSRP: $152.00Now: $144.40Was: $152.00
