Motocross/Dirt Bike Engine Parts

Motorcycle Engine Parts

Featured Brands

  • Castrol® - Actevo X-Tra 4T Semi-Synthetic Motor Oil
    Castrol®Actevo X-Tra 4T Semi-Synthetic Motor Oil
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    # sp208744
    Actevo X-Tra 4T Semi-Synthetic Motor Oil by Castrol®. Castrol Actevo X-TRA 4T with TRIZONE™ Technology is a high quality, part-synthetic lubricant, for 4-stroke motorcycle and scooter engines specially formulated with Active and...
    The Active Protection Molecules in Castrol Actevo X-TRA 4T cling to engine surfaces, creating a level of protection against wear; from the start-up to the end of every journey, under all driving conditionsDeveloped with TRIZONE Technology that provides exceptional protection in the three most critical zones of 4-stroke motorcycles: Engine – protection for higher performance and longer service life
    $38.43 - $1,722.94
  • Champion Brands® - WP2 2-Cycle Racing Oil
    Champion Brands®WP2 2-Cycle Racing Oil
    0
    # sp230167
    WP2 2-Cycle Racing Oil by Champion Brands®. This premium product is the best way to go for those looking for the highest quality replacement that offers supreme levels of quality, performance and reliability. Designed to provide a...
    Crafted to deliver unbeatable levels of qualityHigh grade materials for exceptional performance
    $35.73 - $160.80
  • Dennis Stubblefield Sales® - Flywheel Puller
    Dennis Stubblefield Sales®Flywheel Puller
    0
    # sp222392
    Flywheel Puller by Dennis Stubblefield Sales®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from...
    Built to match your exact requirementsHigh quality you can rely on
    $14.27 - $64.29
  • IPONE® - 15.5 Synthesis Motor Oil
    IPONE®15.5 Synthesis Motor Oil
    0
    # sp208761
    15.5 Synthesis Motor Oil by IPONE®. 15.5 is a high-quality, semi-synthetic lubricant for 4-stroke motorcycles that ensures complete lubrication and protection of your engine.
    Semi-synthetic lubricant recommended for all motorcycle typesViscosity of 15W50 grade gives very good stability over time
    $8.21
  • IPONE® - ATV 4000 Motor Oil and Additive
    IPONE®ATV 4000 Motor Oil and Additive
    0
    # sp208762
    ATV 4000 Motor Oil and Additive by IPONE®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from...
    100% synthetic formulationMaintains its viscosity, engine cleaning, shear resistance
    $27.54 - $275.67
  • IPONE® - R4000 RS Lubricant
    IPONE®R4000 RS Lubricant
    0
    # sp208763
    R4000 RS Lubricant by IPONE®. Viscosity is suitable for a very wide range of temperatures: SAE 10W for starts in very cold weather (recommended for hydraulic tappets), and SAE 30 for high engine temperatures. R4000 RS is a high-quality,...
    A high-performance semi-synthetic lubricantRecommended for modern high performance machines
    $9.64 - $56.98
  • Klotz® - BeNOLâ„¢ Racing Castor Lubricant
    Klotz®BeNOL™ Racing Castor Lubricant
    0
    # sp157586
    BeNOL™ Racing Castor Lubricant by Klotz®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from...
    Identifiable Klotz red and racy scentImproves throttle response
    $9.00 - $53.41
  • Klotz® - MX4â„¢ TechniPlateâ„¢ 4-Stroke Motorcycle Engine Oil
    Klotz®MX4™ TechniPlate™ 4-Stroke Motorcycle Engine Oil
    0
    # sp208766
    MX4™ TechniPlate™ 4-Stroke Motorcycle Engine Oil by Klotz®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship....
    Certified warranty compliant: JASO MA2 (T903) 2011 and API SJ/SNHigh load carrying capacity for the ultimate in engine and valve train protection
    $16.07
  • Klotz® - Motorcycle TechniPlateâ„¢ 2-Stroke Lube
    Klotz®Motorcycle TechniPlate™ 2-Stroke Lube
    0
    # sp157587
    Motorcycle TechniPlate™ 2-Stroke Lube by Klotz®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from...
    Certified warranty compliant: NMMA RL#93101 TC-W3, JASO FD, ISO-EGDPre-mix or oil injection
    $14.52 - $60.97
  • Klotz® - R-50â„¢ Racing TechniPlateâ„¢ 2-Stroke Lubricant
    Klotz®R-50™ Racing TechniPlate™ 2-Stroke Lubricant
    0
    # sp157589
    R-50™ Racing TechniPlate™ 2-Stroke Lubricant by Klotz®. For racing and abusive situations. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high...
    Recommended for power valve enginesIdentifiable Klotz red and racy scent
    $10.35 - $69.98
  • Klotz® - SkiCraftâ„¢ TechniPlateâ„¢ 2-Stroke Lubricant
    Klotz®SkiCraft™ TechniPlate™ 2-Stroke Lubricant
    1
    # sp208769
    SkiCraft™ TechniPlate™ 2-Stroke Lubricant by Klotz®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured...
    Certified warranty compliant: NMMA RL#93101 TC-W3, JASO FD, DFIImproved throttle response
    $14.96 - $57.60
  • Klotz® - Snowmobile TechniPlateâ„¢ 2-Stroke Synthetic Lubricant
    Klotz®Snowmobile TechniPlate™ 2-Stroke Synthetic Lubricant
    0
    # sp208770
    Snowmobile TechniPlate™ 2-Stroke Synthetic Lubricant by Klotz®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship....
    Certified warranty compliant: NMMA RL#93101 TC-W3, JASO FD, DFIIdentifiable Klotz red. Smells like Klotz
    $18.04 - $67.10
  • Klotz® - Super Techniplateâ„¢ 2-Cycle Synthetic Racing Oil
    Klotz®Super Techniplate™ 2-Cycle Synthetic Racing Oil
    0
    # sp157591
    Super Techniplate™ 2-Cycle Synthetic Racing Oil by Klotz®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship....
    For 2-cycle pre-mix only (not for oil injection systems)TechniPlate® lubricity system for superior film strength and anti-scuff protection
    $11.55 - $59.54
  • Motion Pro® - Flywheel Puller
    Motion Pro®Flywheel Puller
    2
    # sp150664
    Flywheel Puller by Motion Pro®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from industry-leading...
    Precisely engineered to ensure ultimate efficiencyManufactured using innovative technologies
    $9.99 - $81.99
  • Motion Pro® - Flywheel Puller/Primary Gear Extractor
    Motion Pro®Flywheel Puller/Primary Gear Extractor
    0
    # sp161885
    Flywheel Puller/Primary Gear Extractor by Motion Pro®. Designed to remove the rotor and primary gear. The perfect fit for your needs. This top-grade product is expertly made in compliance with stringent industry standards to offer a...
    Equivalent to KTM tool 59029021044Used for removal of the flywheel or rotor if applicable
    $25.99
  • Motion Pro® - Heim Joint Tool
    Motion Pro®Heim Joint Tool
    0
    # sp150668
    Heim Joint Tool by Motion Pro®. Aligns Heim joint for easy installation and built-in stop correctly centers Heim joint in swingarm. Aligns and installs Heim joint seals. Handle includes retention O-Ring to hold Heim joint adaptors and...
    Aligns heim joint for easy installationBuilt in stop correctly centers heim joint in swing arm
    $48.99 - $52.99
  • Motorex® - ATV/Quad 4T Engine Oil
    Motorex®ATV/Quad 4T Engine Oil
    0
    # sp230108
    ATV/Quad 4T Engine Oil by Motorex®. Modern semi-synthetic quality engine oil for 4-Stroke ATV/Quads offers excellent wear protection, very good cold start characteristics, and high shear stability. Catalytic converter tested.
    Modern semi-synthetic 4-stroke ATV engine oilVery good cold starting characteristics
    $17.79 - $19.06
  • Motorex® - Cross Power 2T Engine Oil
    Motorex®Cross Power 2T Engine Oil
    0
    # sp208736
    Cross Power 2T Engine Oil by Motorex®. Extremely clean burning, fully synthetic, high-performance engine oil for 2-Stroke motorcycles. Especially developed for the hard conditions of offroad use.
    Fully synthetic high-performance 2-stroke off- road racing oilOptimum off-road performance and wear protection
    $29.06 - $524.63
  • Motorex® - Formula 4T Engine Oil
    Motorex®Formula 4T Engine Oil
    0
    # sp208738
    Formula 4T Engine Oil by Motorex®. Modern semi-synthetic quality engine oil for 4-Stroke motorcycles delivers absolutely reliable lubrication, thermal stability and good wear protection. Catalytic converter tested.
    Semi-synthetic 4-stroke engine oilGood wear protection
    $72.03 - $318.02
  • Motorex® - Power Synthetic 4T Engine Oil
    Motorex®Power Synthetic 4T Engine Oil
    0
    # sp208739
    Power Synthetic 4T Engine Oil by Motorex®. Fully synthetic PAO and ester-based high-performance engine oil for 4-Stroke sport motorcycles offering optimum wear protection and extreme thermal and shear stability. Racing quality;...
    Full Synthetic PAO and Ester based high performance 4-stroke engine oilDeveloped for sport bike applications
    $85.92 - $397.98
  • Motorex® - Scooter Forza 2T Engine Oil
    Motorex®Scooter Forza 2T Engine Oil
    0
    # sp230109
    Scooter Forza 2T Engine Oil by Motorex®. Fully synthetic, high-performance engine oil for 2-Stroke motor scooters that optimizes the efficiency of the engine, burns completely clean and free of residue. Minimum smoke formation for an...
    Fully synthetic 2-stroke scooter engine oilNew formulation
    $23.66 - $29.01
  • Motorex® - Top Speed 4T Engine Oil
    Motorex®Top Speed 4T Engine Oil
    0
    # sp208740
    Top Speed 4T Engine Oil by Motorex®. Top Speed 4T has recently gone through a formulation update. The are now JASO MA2. With this formulation upate to the new standard, the oil will no longer be green in color, amber will be the...
    Synthetic 4-stroke engine oilExcellent protection against wear
    $17.83 - $350.75
  • Motul USA® - 3000 4T Engine Oil 10W40
    Motul USA®3000 4T Engine Oil 10W40
    0
    # sp208675
    3000 4T Engine Oil 10W40 by Motul USA®. This product is made of high-quality components to meet and exceed strict quality requirements. Designed using state-of-the-art technology and with customers in mind. It will meet your needs and...
    Made to provide the perfect lubricant solution for your needsDesigned with innovative manufacturing techniques
    $8.63 - $1,232.31
  • Motul USA® - 5100 Synthetic Blend 4-Stroke Motor Oil 10W40
    Motul USA®5100 Synthetic Blend 4-Stroke Motor Oil 10W40
    0
    # sp208678
    5100 Synthetic Blend 4-Stroke Motor Oil 10W40 by Motul USA®. This product is made of high-quality components to meet and exceed strict quality requirements. Designed using state-of-the-art technology and with customers in mind. It will...
    Made to provide the perfect lubricant solution for your needsDesigned with innovative manufacturing techniques
    $134.38 - $220.49
  • Motul USA® - 710 2-Stroke Synthetic Engine Oil
    Motul USA®710 2-Stroke Synthetic Engine Oil
    0
    # sp208679
    710 2-Stroke Synthetic Engine Oil by Motul USA®. This product is made of high-quality components to meet and exceed strict quality requirements. Designed using state-of-the-art technology and with customers in mind. It will meet your...
    Made to provide the perfect lubricant solution for your needsDesigned with innovative manufacturing techniques
    $67.38 - $211.69
  • Motul USA® - 7100 100% Synthetic 4 Stroke Engine Oil 10W40
    Motul USA®7100 100% Synthetic 4 Stroke Engine Oil 10W40
    0
    # sp208680
    7100 100% Synthetic 4 Stroke Engine Oil 10W40 by Motul USA®. Technosynthese™ products giving you the best compromise between performance and price competitiveness. Specially designed for recent vehicles powered by Gasoline and Diesel...
    Made to provide the perfect lubricant solution for your needsDesigned with innovative manufacturing techniques
    $15.39 - $2,693.27
  • Motul USA® - 7100 100% Synthetic 4 Stroke Engine Oil 10W50
    Motul USA®7100 100% Synthetic 4 Stroke Engine Oil 10W50
    0
    # sp208681
    7100 100% Synthetic 4 Stroke Engine Oil 10W50 by Motul USA®. Technosynthese™ products giving you the best compromise between performance and price competitiveness. Specially designed for recent vehicles powered by Gasoline and Diesel...
    Made to provide the perfect lubricant solution for your needsDesigned with innovative manufacturing techniques
    $49.50 - $2,124.15
  • Motul USA® - 7100 100% Synthetic 4 Stroke Engine Oil 10W60
    Motul USA®7100 100% Synthetic 4 Stroke Engine Oil 10W60
    0
    # sp208682
    7100 100% Synthetic 4 Stroke Engine Oil 10W60 by Motul USA®. Technosynthese™ products giving you the best compromise between performance and price competitiveness. Specially designed for recent vehicles powered by Gasoline and...
    Made to provide the perfect lubricant solution for your needsDesigned with innovative manufacturing techniques
    $174.45 - $218.11
  • Motul USA® - 7100 100% Synthetic 4 Stroke Engine Oil 15W50
    Motul USA®7100 100% Synthetic 4 Stroke Engine Oil 15W50
    0
    # sp208683
    7100 100% Synthetic 4 Stroke Engine Oil 15W50 by Motul USA®. Technosynthese™ products giving you the best compromise between performance and price competitiveness. Specially designed for recent vehicles powered by Gasoline and...
    Made to provide the perfect lubricant solution for your needsDesigned with innovative manufacturing techniques
    $16.16 - $294.10
  • Motul USA® - 800 2-Stroke FL Off Road Engine Oil
    Motul USA®800 2-Stroke FL Off Road Engine Oil
    0
    # sp208686
    800 2-Stroke FL Off Road Engine Oil by Motul USA®. This product is made of high-quality components to meet and exceed strict quality requirements. Designed using state-of-the-art technology and with customers in mind. It will meet your...
    Made to provide the perfect lubricant solution for your needsDesigned with innovative manufacturing techniques
    $20.80 - $79.28




If you love to ride your dirt bike on the most rugged terrains, you have probably considered modifying it so that your motorcycle could satisfy your demands for power, efficiency, handling, safety, and comfort. After installing an aftermarket exhaust, a new set of sprockets and tires and after tuning your suspension to match your riding style and trail conditions, it is time to get to the heart of your machine, its engine. The motor creates power and torque that moves the vehicle forward. In case you wish to accelerate faster or reach higher maximum speed, consider upgrading your powerplant with our premium-quality motocross or dirt bike engine parts.

We carry a wide assortment of cylinder heads, engine blocks, cylinders, crankshafts, camshafts, valves and valvetrain parts, timing gears and chains, pistons, rings, connecting rods, oil filters, pumps, gaskets, and all of the needed hardware and mounts. Whether you want to upgrade your engine or restore the factory characteristics of your stock unit, we have you covered. On the digital shelves of our online store, we showcase only high-quality dirt bike engine parts designed and produced by some of the most reputable manufacturing companies in the game, such as Wrench Rabbit, Athena, Cylinder Works, All Balls, K&M, and many others.

One of the main components of the motor is a cylinder head. Its dimensions can greatly affect the resulting power. Larger intake and exhaust ports can accommodate larger valves designed to deliver higher volumes of fuel and air mixture into the combustion chamber and ensure quicker evacuation of exhaust gases. Shortened valve guides can accept higher lift cams. A big bore cylinder made from aircraft-grade aluminum works perfectly with a large forged piston. If your camshaft timing chain needs replacement, you have come to the right place. Note that not all kits include a master link, and you may need to purchase it separately.

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