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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DEL WEST Valve Spring Retainer DW-SZ-RX01-S
DEL WEST
$48.95Del West is the world's largest supplier of titanium valves and valvetrain components for motor racing including those from NASCAR to the exotic engines of Formula One and a long relationship with Pro Circuit in professional motocross, Meets the demands...09262474- SKU:
- 09262474
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- VALVE SPRING
- UNITS:
- EACH
- APPLICATION:
- INTAKE
- APPLICATION:
- EXHAUST
- PRODUCT NAME:
- RETAINER
$48.95Qty in Cart: 0Quantity:Price:$48.95Subtotal: -
DEL WEST Valve Spring Retainer DW-H-RX03-S
DEL WEST
$51.95Del West is the world's largest supplier of titanium valves and valvetrain components for motor racing including those from NASCAR to the exotic engines of Formula One and a long relationship with Pro Circuit in professional motocross, Meets the demands...09262475- SKU:
- 09262475
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- EXHAUST
- TYPE:
- VALVE SPRING
- UNITS:
- EACH
- MATERIAL:
- STEEL
- PRODUCT NAME:
- RETAINER
- APPLICATION:
- INTAKE
$51.95 -
DEL WEST Valve Spring Retainer DW-H-RX04-S
DEL WEST
$48.95Del West is the world's largest supplier of titanium valves and valvetrain components for motor racing including those from NASCAR to the exotic engines of Formula One and a long relationship with Pro Circuit in professional motocross, Meets the demands...09262476- SKU:
- 09262476
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- APPLICATION:
- EXHAUST
- TYPE:
- VALVE SPRING
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- MATERIAL:
- STEEL
- PRODUCT NAME:
- RETAINER
$48.95Qty in Cart: 0Quantity:Price:$48.95Subtotal: -
DEL WEST Exhaust Valve DW-CRF450R-EV02
DEL WEST
$155.95Meets the demands of off-road, all valves are backed by an established record of performance and reliability in competition that is unapproachable09261046- SKU:
- 09261046
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- APPLICATION:
- EXHAUST
- UNITS:
- EACH
- PRODUCT NAME:
- VALVE
- RIDING STYLE:
- OFF-ROAD
- MATERIAL:
- TITANIUM
$155.95Qty in Cart: 0Quantity:Price:$155.95Subtotal: -
BOLT Oil Change Hardware Kit - Yamaha OILCHG-YZF
BOLT
$7.99Contains two sets of oil filter cover O-rings, oil strainer O-rings (if applicable) and four sets of drain plug washers07120521- SKU:
- 07120521
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- HARDWARE
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- OIL CHANGE
$7.99 -
FRAM Oil Filter - Honda CH6096
FRAM
$19.06Dependable Fram protection for your motorcycle engine, Complete change kit - all gaskets included07120356- SKU:
- 07120356
- Availability:
- Ships Same Business Day
- Weight:
- 0.55 LBS
- PRODUCT NAME:
- OIL FILTER
- RIDING STYLE:
- OFF-ROAD
- COLOR/FINISH:
- YELLOW
- UNITS:
- KIT
- BASE COLOR:
- YELLOW
- FEATURES:
- COMPLETE CHANGE KIT
- FILTER MEDIA MATERIAL:
- CELLULOSE AND GLASS BLEND
- RIDING STYLE:
- ATV
- TYPE:
- CARTRIDGE
$19.06Qty in Cart: 0Quantity:Price:$19.06Subtotal: -
JAGG OIL COOLERS Oil Line Upgrade Kit - Black - 6' 211-JLWN06-6
JAGG OIL COOLERS
$89.95Sets your bike apart and gives your Jagg oil cooler a racy look with performance braided oil hoses straight from the track-ready line of Susa's motorsport division, Kits include two aluminum hose separators in matching color and four aluminum hose...07110236- SKU:
- 07110236
- Availability:
- Ships Same Business Day
- Weight:
- 1.25 LBS
- BASE COLOR:
- BLACK
- RIDING STYLE:
- STREET
- TYPE:
- OIL
- PRODUCT NAME:
- HOSE
- LENGTH IMPERIAL:
- 6'
- COLOR/FINISH:
- BLACK
- UNITS:
- KIT
$89.95Qty in Cart: 0Quantity:Price:$89.95Subtotal: -
JAGG OIL COOLERS Oil Line Upgrade Kit - Stainless Steel - 6' 211-JSSN06-6
JAGG OIL COOLERS
$89.95Sets your bike apart and gives your Jagg oil cooler a racy look with performance braided oil hoses straight from the track-ready line of Susa's motorsport division, Kits include two aluminum hose separators in matching color and four aluminum hose...07110237- SKU:
- 07110237
- Availability:
- Ships Same Business Day
- Weight:
- 1.50 LBS
- PRODUCT NAME:
- HOSE
- UNITS:
- KIT
- LENGTH IMPERIAL:
- 6'
- RIDING STYLE:
- STREET
- TYPE:
- OIL
- BASE FINISH:
- NATURAL
- COLOR/FINISH:
- STAINLESS STEEL
$89.95Qty in Cart: 0Quantity:Price:$89.95Subtotal: -
MOOSE RACING Oil Filter - KTM DT-09-51
MOOSE RACING
$5.95High-quality replacement for your standard filter, Can filter down to 10 microns, Constructed with high-quality paper filter materials, Manufactured with sealing ring to ensure perfect fit, Offers maximum protection and long-lasting filter life, May be...07120225- SKU:
- 07120225
- Availability:
- Ships Same Business Day
- Weight:
- 0.09 LBS
- STYLE:
- SECOND FILTER FOR DUAL FILTER APPLICATIONS
- FILTER MEDIA MATERIAL:
- PAPER
- MICRON RATING:
- 10 MICRONS
- PRODUCT NAME:
- OIL FILTER
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- TYPE:
- CARTRIDGE
- UNITS:
- EACH
$5.95Qty in Cart: 0Quantity:Price:$5.95Subtotal: -
PARTS UNLIMITED Oil Filter 800081675
PARTS UNLIMITED
$6.07Pro Series filters literally use the world's finest materials: German paper, English glue and Japanese zinc steel that meet or exceed OEM requirements, All necessary gaskets and o-rings are included with most filters07120112- SKU:
- 07120112
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- BASE COLOR:
- YELLOW
- STYLE:
- STANDARD
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- FILTER MEDIA MATERIAL:
- PAPER
- PRODUCT NAME:
- OIL FILTER
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- COLOR/FINISH:
- YELLOW
- TYPE:
- CARTRIDGE
$6.07Qty in Cart: 0Quantity:Price:$6.07Subtotal: -
PARTS UNLIMITED Oil Filter 16099-004
PARTS UNLIMITED
$7.09Pro Series filters literally use the world's finest materials: German paper, English glue and Japanese zinc steel that meet or exceed OEM requirements, All necessary gaskets and o-rings are included with most filtersK150037- SKU:
- K150037
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- RIDING STYLE:
- ATV
- STYLE:
- STANDARD
- COLOR/FINISH:
- ORANGE
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- TYPE:
- CARTRIDGE
- UNITS:
- EACH
- BASE COLOR:
- ORANGE
- FILTER MEDIA MATERIAL:
- PAPER
- PRODUCT NAME:
- OIL FILTER
$7.09Qty in Cart: 0Quantity:Price:$7.09Subtotal: -
PC RACING Oil Filter PC123
PC RACING
$49.95Filters are reusable and are made from laser-cut, medical-grade, 304 stainless steel micronic filter cloth, Filter down to 35 microns and maintains consistent flow under all conditions including cold start-ups, the presence of water, and extreme heat (up...07120217- SKU:
- 07120217
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- BASE COLOR:
- SILVER
- FEATURES:
- REUSABLE
- BASE FINISH:
- POLISHED
- COLOR/FINISH:
- POLISHED
- MODEL:
- FLO
- PRODUCT NAME:
- OIL FILTER
- FILTER MEDIA MATERIAL:
- MICRONIC FILTER CLOTH
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- STYLE:
- STANDARD
- TYPE:
- CARTRIDGE
- MATERIAL:
- STAINLESS STEEL
- MICRON RATING:
- 35 MICRONS
- RIDING STYLE:
- ATV
- UNITS:
- EACH
$49.95Qty in Cart: 0Quantity:Price:$49.95Subtotal: -
Pro Filter Billet Aluminum Oil Filter Cover Honda CRF450R 2009-2016 BCA-1002-01
PRO FILTER
$55.99Enhance your engine's performance with the PRO FILTER Oil Filter Cover, expertly crafted from CNC-machined 6061 T-6 billet aluminum. Designed for both strength and lightweight efficiency, this oil filter cover ensures optimal flow and durability, making...07120632- SKU:
- 07120632
- Availability:
- Ships Same Business Day
- Weight:
- 0.26 LBS
- TYPE:
- OIL FILTER
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- BLACK ANODIZED
- PRODUCT NAME:
- COVER
- UNITS:
- EACH
$55.99Qty in Cart: 0Quantity:Price:$55.99Subtotal: -
Pro Filter Billet Aluminum Oil Filter Cover for 2004-2018 Kawasaki KX250F BCA-3401-00
PRO FILTER
$39.99Elevate your vehicle’s performance with the PRO FILTER Oil Filter Cover, expertly crafted from high-quality CNC-machined 6061 T-6 billet aluminum. This innovative cover not only enhances oil flow but also ensures a lightweight and durable solution that...07120636- SKU:
- 07120636
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- COLOR/FINISH:
- BLACK ANODIZED
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- TYPE:
- OIL FILTER
- PRODUCT NAME:
- COVER
- UNITS:
- EACH
$39.99Qty in Cart: 0Quantity:Price:$39.99Subtotal: -
VESRAH Complete Gasket Kit - Honda 100 VG-120
VESRAH
$49.95Complete gasket sets include all necessary engine gaskets, o-rings and valve guide oil seals to rebuild a complete engine (do not include oil seals); sold each, Top-end gasket sets include all necessary top-end gaskets, o-rings and valve guide oil seals...VG120- SKU:
- VG120
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- SET
$49.95Qty in Cart: 0Quantity:Price:$49.95Subtotal: -
WINDEROSA Complete Gasket Kit - Kawasaki 1100 611405
WINDEROSA
$169.08Full engine gasket set includes bases, heads, intakes and crankshaft oil seals, Made in the U.S.A.PD810355- SKU:
- PD810355
- Availability:
- Ships Same Business Day
- Weight:
- 0.69 LBS
- RIDING STYLE:
- WATERCRAFT
- UNITS:
- SET
- PRODUCT NAME:
- GASKET SET
- TYPE:
- COMPLETE
$169.08Qty in Cart: 0Quantity:Price:$169.08Subtotal: -
Wiseco Piston Kit 2.00mm Oversize 73.95mm Yamaha YZ250 1976-1979 234M07200
WISECO
$224.95Engineered for unparalleled performance, the WISECO 234M07200 piston is forged from a high-silicon alloy, ensuring exceptional strength and reliability for both trail and racing enthusiasts. This piston is designed to enhance engine efficiency and...234M07200- SKU:
- 234M07200
- Availability:
- Ships Same Business Day
- Weight:
- 0.60 LBS
- BORE - OVERSIZE:
- +2,00 MM
- MODEL:
- FORGED SERIES
- PISTON DIAMETER METRIC:
- 71.95 MM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- SKIRT COATING:
- NON-COATED
- BORE - OVERSIZE METRIC:
- +2.00 MM
- BORE SIZE METRIC:
- 72.00 MM
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- STROKE LENGTH METRIC:
- 64.00 MM
- DISPLACEMENT:
- 246 CC
- PRODUCT NAME:
- PISTON KIT
$224.95 -
K & N Oil Filter KN-556
K & N
$11.99K&N delivers a premium oil filter which is built with a synthetic media specifically designed to withstand the high concentrates of synthetic racing oils, A large filter media provides high-flow rates and outstanding oil filtration to keep your motor...07120118- SKU:
- 07120118
- Availability:
- Ships Same Business Day
- Weight:
- 0.23 LBS
- LENGTH METRIC:
- 105 MM
- PRODUCT NAME:
- OIL FILTER
- COLOR/FINISH:
- RED
- FILTER MEDIA MATERIAL:
- SYNTHETIC
- RIDING STYLE:
- SNOW
- STYLE:
- STANDARD
- TYPE:
- CARTRIDGE
- BASE COLOR:
- RED
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- BASE FINISH:
- NATURAL
- RIDING STYLE:
- WATERCRAFT
$11.99 -
PINGEL Red Oil Fill Cap - CR/KX/YZ 62100
PINGEL
$33.95Machined from billet aluminum and anodized red, Ultra-strong oil filler caps will not break or crack like stock oil filler caps, Knurled body provides a secure fit, No wrench required, O-ring included with cap to provide no-leak sealing, Made in the U.S...P62100- SKU:
- P62100
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- COLOR/FINISH:
- RED
- UNITS:
- EACH
- MATERIAL:
- BILLET ALUMINUM
- PRODUCT NAME:
- CAP
- RIDING STYLE:
- OFF-ROAD
- BASE COLOR:
- RED
- TYPE:
- OIL FILLER
$33.95Qty in Cart: 0Quantity:Price:$33.95Subtotal: -
Pro Filter Replacement Oil Filter for 2017-2025 Kawasaki Z125 PRO PF-112
PRO FILTER
$6.99Enhance your engine's performance with the PRO FILTER Replacement Oil Filter PF-112. Designed to meet and exceed OEM specifications, this high-performance filter ensures optimal filtration and consistent flow rates, making it ideal for both synthetic and...07120240- SKU:
- 07120240
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 LBS
- COLOR/FINISH:
- YELLOW
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- OIL FILTER
- RIDING STYLE:
- UTV
- STYLE:
- STANDARD
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- BASE COLOR:
- YELLOW
- FILTER MEDIA MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
$6.99
