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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VESRAH Complete Gasket Kit - YZ100 VG-2010
VESRAH
$30.81A complete engine rebuild demands precision sealing at every junction, and substandard gaskets compromise compression, leak oil, and fail prematurely. The VESRAH Complete Gasket Kit VG-2010 supplies every seal your YZ100 engine needs for a fresh,...VG2010- SKU:
- VG2010
- Availability:
- Ships Same Business Day
- Weight:
- 0.26 LBS
- PRODUCT NAME:
- GASKET
- UNITS:
- SET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
$30.81 -
WINDEROSA Complete Gasket Kit - Yamaha 1100 611604
WINDEROSA
$190.78Engine gasket failure is one of the fastest paths to catastrophic engine damage—and the last thing you need mid-season is oil leaking past a degraded seal or coolant seeping through a failed head gasket. The WINDEROSA Complete Gasket Kit for Yamaha 1100...PD811540- SKU:
- PD811540
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- PRODUCT NAME:
- GASKET SET
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- COMPLETE
- UNITS:
- SET
$190.78 -
MATRIX CONCEPTS,LLC Oil Drain Pan M28 100
MATRIX CONCEPTS,LLC
$26.95Oil changes are a fundamental maintenance task, but spills and mess are an unnecessary hassle. The MATRIX CONCEPTS M28100 Oil Drain Pan eliminates guesswork with its integrated containment design and secure screw-on cap, letting you drain, store, and...07120360- SKU:
- 07120360
- Availability:
- Ships Same Business Day
- Weight:
- 1.05 LBS
- MATERIAL:
- PLASTIC
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- UNITS:
- EACH
- LENGTH METRIC:
- 25.4 CM
- RIDING STYLE:
- SNOW
- WIDTH METRIC:
- 38.1 CM
- COLOR/FINISH:
- WHITE
- FEATURES:
- 6 QUARTS
- PRODUCT NAME:
- PAN
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- STREET
- RIDING STYLE:
- UTV
- TYPE:
- OIL DRAIN
$26.95 -
MATRIX CONCEPTS,LLC Oil Drain Pan - 15 Quart M28-115
MATRIX CONCEPTS,LLC
$29.95Oil changes are a non-negotiable part of vehicle maintenance, but traditional drain pans often create a mess that wastes time and damages shop floors. The MATRIX CONCEPTS M28-115 eliminates that frustration with a sealed, integrated design that captures...07120644- SKU:
- 07120644
- Availability:
- Ships Same Business Day
- Weight:
- 2.21 LBS
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- LENGTH METRIC:
- 53 CM
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- UTV
- WIDTH METRIC:
- 38.1 CM
- COLOR/FINISH:
- WHITE
- FEATURES:
- 15 QUARTS
- PRODUCT NAME:
- PAN
- RIDING STYLE:
- OFF-ROAD
- MATERIAL:
- PLASTIC
- RIDING STYLE:
- STREET
- TYPE:
- OIL DRAIN
$29.95 -
On Sale
Wiseco Piston Honda CB750 1979-1982 871M08950
WISECO
MSRP: $238.95Now: $200.00Was: $238.95The Wiseco piston is engineered to restore or exceed OEM performance specifications for your Honda CB750, delivering reliable compression and consistent power delivery across the RPM range. Whether you're rebuilding a stock engine or preparing for track...09102023- SKU:
- 09102023
- Availability:
- Ships Same Business Day
- Weight:
- 1.24 LBS
- BORE - OVERSIZE:
- +0,50 MM
- BORE - OVERSIZE METRIC:
- +0.50 MM
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- ALUMINUM
- BORE SIZE METRIC:
- 89.50 MM
- PRODUCT NAME:
- PISTON
- SKIRT COATING:
- ARMORGLIDE®
- UNITS:
- EACH
- DISPLACEMENT:
- 472 CC
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 76.00 MM
- PISTON MATERIAL:
- FORGED
MSRP: $238.95Now: $200.00Was: $238.95 -
On Sale
Wiseco Honda CRF450R 2002-2008 Piston Kit with Gaskets PK1365
WISECO
MSRP: $359.95Now: $276.00Was: $359.95A top-end rebuild demands precision components that can handle sustained high RPM loads without compromise. The Wiseco Honda CRF450R Piston Kit delivers the strength and thermal stability your engine needs to maintain peak performance across repeated...09030567- SKU:
- 09030567
- Availability:
- Ships Same Business Day
- Weight:
- 1.80 LBS
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 62.10 MM
- UNITS:
- KIT
- BORE - OVERSIZE:
- STANDARD
- BORE SIZE METRIC:
- 96.00 MM
- ENGINE TYPE:
- 4-STROKE
- MODEL:
- FORGED SERIES
- TYPE:
- TOP END
- PISTON MATERIAL:
- 2618 ALUMINUM ALLOY
- BORE - OVERSIZE METRIC:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 12.0:1
- DISPLACEMENT:
- 449 CC
- PISTON DIAMETER METRIC:
- 95.94 MM
- PRODUCT NAME:
- REBUILD KIT
- SKIRT COATING:
- ARMORGLIDE®
MSRP: $359.95Now: $276.00Was: $359.95 -
On Sale
Wiseco Piston Kit Kawasaki KX250F 2011-2014 77mm 14.5:1 40020M07700
WISECO
MSRP: $264.95Now: $225.00Was: $264.95The Wiseco Piston Kit for your KX250F delivers the precision engineering and durability needed to maintain peak combustion efficiency and throttle response in competitive or recreational riding. A quality piston upgrade directly impacts power delivery,...09102896- SKU:
- 09102896
- Availability:
- Ships Same Business Day
- Weight:
- 0.60 LBS
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- RIDING STYLE:
- OFF-ROAD
- BORE SIZE METRIC:
- 77.00 MM
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- STROKE LENGTH METRIC:
- 53.60 MM
- UNITS:
- EACH
- COMPRESSION RATIO IMPERIAL:
- 14.5:1
- DISPLACEMENT:
- 250 CC
MSRP: $264.95Now: $225.00Was: $264.95 -
On Sale
Wiseco Piston Kit 53.00mm 1.00mm Oversize Yamaha MX100 1979-1983 235M05300
WISECO
MSRP: $148.95Now: $119.00Was: $148.95Whether you're rebuilding a vintage Yamaha MX100 or pushing your 1979-1983 machine to its limits on the track, a quality piston kit is critical to maintaining reliable power and combustion efficiency. Wiseco's 53.00mm oversize design gives you the...235M05300- SKU:
- 235M05300
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- DISPLACEMENT:
- 98 CC
- ENGINE TYPE:
- 2-STROKE
- PISTON DIAMETER METRIC:
- 52.95 MM
- BORE SIZE METRIC:
- 53.00 MM
- BORE - OVERSIZE:
- +1,00 MM
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- BORE - OVERSIZE METRIC:
- +1.00 MM
- MODEL:
- FORGED SERIES
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- SKIRT COATING:
- NON-COATED
- STROKE LENGTH METRIC:
- 45.60 MM
MSRP: $148.95Now: $119.00Was: $148.95 -
On Sale
Wiseco Piston Kit Yamaha DT400 1975-1978 85.50mm 232M08550
WISECO
MSRP: $209.95Now: $178.00Was: $209.95If you're running a Yamaha DT400 and want to restore lost compression or build a higher-displacement engine, a quality piston kit is non-negotiable. Wiseco's high-silicon alloy construction handles the demands of both trail abuse and competitive racing...232M08550- SKU:
- 232M08550
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
- MODEL:
- FORGED SERIES
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- UNITS:
- KIT
- BORE SIZE METRIC:
- 85.50 MM
- PRODUCT NAME:
- PISTON KIT
- BORE - OVERSIZE METRIC:
- +0.50 MM
- PISTON DIAMETER METRIC:
- 85.42 MM
- BORE - OVERSIZE:
- +0,50 MM
- DISPLACEMENT:
- 397 CC
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- SKIRT COATING:
- NON-COATED
- STROKE LENGTH METRIC:
- 70.00 MM
MSRP: $209.95Now: $178.00Was: $209.95 -
ACERBIS X-Power Cover Kit - Black - Honda 2791950001
ACERBIS
$69.95Engine casings are vulnerable to mud, rocks, and debris—especially in off-road and trail conditions where protection matters most. The ACERBIS X-Power Cover Kit shields both your crankcase and ignition/clutch cover from impact and contamination without...09401891- SKU:
- 09401891
- Availability:
- Ships Same Business Day
- Weight:
- 1.45 LBS
- MODEL:
- X-POWER
- COLOR/FINISH:
- BLACK
- MATERIAL:
- PLASTIC
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- ENGINE
- PRODUCT NAME:
- COVER
- PRODUCT NAME:
- COVER KIT
$69.95 -
ACERBIS X-Power Cover Kit - White - KTM/Husqvarna 2731970002
ACERBIS
$63.95Protect your engine from track debris and impacts without compromising airflow or serviceability. The ACERBIS X-Power Cover Kit combines durable construction with direct bolt-on installation using your existing hardware—no fabrication required. This is...09401762- SKU:
- 09401762
- Availability:
- Ships Same Business Day
- Weight:
- 1.41 LBS
- COLOR/FINISH:
- WHITE
- MATERIAL:
- PLASTIC
- PRODUCT NAME:
- COVER
- TYPE:
- ENGINE
- MODEL:
- X-POWER
- RIDING STYLE:
- STREET
- UNITS:
- KIT
$63.95 -
ACERBIS X-Power Cover Kit - Orange - KTM/Husqvarna 2645515226
ACERBIS
$69.95If you're riding hard on the trails or track, your engine cases take a beating from flying rocks, roost, and impact damage that can lead to costly repairs. The ACERBIS X-Power Cover Kit shields your crankcase and ignition/clutch cover with durable,...09401763- SKU:
- 09401763
- Availability:
- Ships Same Business Day
- Weight:
- 1.51 LBS
- COLOR/FINISH:
- ORANGE
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- MATERIAL:
- PLASTIC
- MODEL:
- X-POWER
- RIDING STYLE:
- STREET
- TYPE:
- ENGINE
$69.95 -
K & N Oil Filter KN-655
K & N
$11.99If you're running synthetic or synthetic blended oils in your high-performance engine, your stock oil filter simply won't keep pace. The K&N KN-655 is engineered with synthetic media that handles the higher flow rates and demanding conditions of racing...07120119- SKU:
- 07120119
- Availability:
- Ships Same Business Day
- Weight:
- 0.12 LBS
- BASE COLOR:
- YELLOW
- BASE FINISH:
- NATURAL
- FILTER MEDIA MATERIAL:
- SYNTHETIC
- PRODUCT NAME:
- OIL FILTER
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- STYLE:
- STANDARD
- TYPE:
- CARTRIDGE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- COLOR/FINISH:
- YELLOW
- LENGTH METRIC:
- 69 MM
$11.99 -
K & N Oil Filter KN-611
K & N
$11.99Synthetic racing oils demand a filter engineered to match their performance capabilities—and the K&N KN-611 delivers exactly that. Built with synthetic media specifically formulated to handle the higher flow rates and chemical concentrations of modern...07120388- SKU:
- 07120388
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- BASE FINISH:
- NATURAL
- LENGTH METRIC:
- 88 MM
- STYLE:
- STANDARD
- BASE COLOR:
- RED
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- PRODUCT NAME:
- OIL FILTER
- COLOR/FINISH:
- RED
- FILTER MEDIA MATERIAL:
- SYNTHETIC
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- TYPE:
- CARTRIDGE
$11.99 -
K & N Oil Filter KN-183
K & N
$16.99If you're running synthetic or synthetic-blend oils in your high-performance engine, you need a filter built to handle them—and that's exactly what the K&N KN-183 delivers. The synthetic media construction provides the flow rates your engine demands...07120500- SKU:
- 07120500
- Availability:
- Ships Same Business Day
- Weight:
- 0.41 LBS
- BASE COLOR:
- BLACK
- BASE FINISH:
- COATED
- STYLE:
- PREMIUM
- LENGTH METRIC:
- 78 MM
- PRODUCT NAME:
- OIL FILTER
- RIDING STYLE:
- STREET
- TYPE:
- SPIN-ON
- COLOR/FINISH:
- BLACK
- FEATURES:
- INCLUDES NUT
- FILTER MEDIA MATERIAL:
- SYNTHETIC
- UNITS:
- EACH
$16.99 -
MOOSE RACING Complete Gasket Kit with Oil Seal - KX 811417
MOOSE RACING
$73.14A complete engine and transmission rebuild requires precision gaskets and seals that won't compromise your work or your wallet. This MOOSE RACING kit delivers OEM-quality components at a fraction of dealership pricing, giving you the confidence to tackle...09340875- SKU:
- 09340875
- Availability:
- Ships Same Business Day
- Weight:
- 0.23 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- TYPE:
- ENGINE
$73.14 -
MOOSE RACING Complete Gasket and Oil Seal Kit 811337
MOOSE RACING
$107.09A complete engine and transmission rebuild requires precision-fit gaskets and seals that won't compromise your work or reliability. The MOOSE RACING Complete Gasket and Oil Seal Kit eliminates the hassle of sourcing individual components while delivering...09341905- SKU:
- 09341905
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- TYPE:
- ENGINE
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
$107.09 -
PARTS UNLIMITED Oil Filter T14-4017
PARTS UNLIMITED
$7.09Engine protection starts with filtration—and the PARTS UNLIMITED Oil Filter T14-4017 delivers the reliability your engine demands. Built with premium German filter media, English adhesive formulations, and Japanese zinc-steel construction, this Pro...07120532- SKU:
- 07120532
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- BASE COLOR:
- ORANGE
- STYLE:
- STANDARD
- FILTER MEDIA MATERIAL:
- PAPER
- PRODUCT NAME:
- OIL FILTER
- COLOR/FINISH:
- ORANGE
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- TYPE:
- CARTRIDGE
- UNITS:
- EACH
$7.09 -
PC RACING Oil Filter PC116
PC RACING
$39.95Engine protection starts with filtration. The PC Racing PC116 oil filter uses medical-grade stainless steel to deliver reliable 35-micron filtration across the full operating spectrum—from subzero cold starts to extreme heat. This reusable filter...07120124- SKU:
- 07120124
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- COLOR/FINISH:
- POLISHED
- MICRON RATING:
- 35 MICRONS
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- ATV
- TYPE:
- CARTRIDGE
- UNITS:
- EACH
- FILTER MEDIA MATERIAL:
- MICRONIC FILTER CLOTH
- MATERIAL:
- STAINLESS STEEL
- STYLE:
- STANDARD
- BASE COLOR:
- SILVER
- FEATURES:
- REUSABLE
- PRODUCT NAME:
- OIL FILTER
- BASE FINISH:
- POLISHED
- MODEL:
- FLO
- RIDING STYLE:
- OFF-ROAD
$39.95 -
PC RACING Oil Filter PC112
PC RACING
$39.95Engine protection starts with what your oil filter can actually do. The PC Racing PC112 delivers consistent filtration across the harshest conditions—cold starts, water contamination, and sustained high temperatures—without sacrificing flow rate. Built...07120126- SKU:
- 07120126
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- BASE COLOR:
- SILVER
- FEATURES:
- REUSABLE
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- ATV
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- FILTER MEDIA MATERIAL:
- MICRONIC FILTER CLOTH
- MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- OIL FILTER
- RIDING STYLE:
- OFF-ROAD
- COLOR/FINISH:
- POLISHED
- MICRON RATING:
- 35 MICRONS
- BASE FINISH:
- POLISHED
- MODEL:
- FLO
- STYLE:
- STANDARD
- TYPE:
- CARTRIDGE
$39.95
