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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- Qty in Cart
- Quantity
- Price
- Subtotal
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Wiseco Engine Rebuild Kit 66.40mm Bore Yamaha YZ250 2003-2020 PWR134-100
WISECO
$654.95Revitalize your Yamaha YZ250/X with our comprehensive engine rebuild kit, meticulously crafted to enhance performance and reliability. This all-inclusive package ensures that every component, from the crankshaft to the gaskets, meets the highest...09031519- SKU:
- 09031519
- Availability:
- Ships Same Business Day
- Weight:
- 13.30 LBS
$654.95Qty in Cart: 0Quantity:Price:$654.95Subtotal: -
Wiseco Engine Rebuild Kit 52.50 mm Kawasaki KX100 1995-2013 PWR173-100
WISECO
$569.95Revitalize your Kawasaki KX100 with our comprehensive engine rebuild kit, designed for optimal performance and reliability. This kit includes meticulously crafted components that ensure your engine runs smoothly and efficiently, whether on the track or...09031681- SKU:
- 09031681
- Availability:
- Ships Same Business Day
- Weight:
- 7.85 LBS
$569.95 -
Wiseco Piston Kit 77.00mm Kawasaki KX250F 2006 13.5:1 Compression 4904M07700
WISECO
$224.95Elevate your riding experience with our precision-engineered 77.00 mm forged piston kit, specifically designed for Kawasaki engines. This high-performance piston combines exceptional strength and lightweight construction, ensuring optimal efficiency and...09101670- SKU:
- 09101670
- Availability:
- Ships Same Business Day
- Weight:
- 0.57 LBS
$224.95 -
WISECO Piston Kit with Gaskets - 68.00 mm - Yamaha WR/YZ 250 PK1563
WISECO
$259.95Piston Kit with Gaskets - 68.00 mm - Yamaha WR/YZ 250 Complete piston kit includes pistons, rings, wrist pins, circlips and top-end gasket kit for one complete engine, Wiseco pistons can be fitted only with Wiseco rings, Wiseco ring types are not...09030716- SKU:
- 09030716
- Availability:
- Ships Same Business Day
- Weight:
- 1.50 LBS
$259.95 -
Wiseco Piston Kit 95.00 mm Yamaha YFZ450R 2009-2019 RE819M09500
WISECO
$239.95Elevate your riding experience with our precision-engineered 95.00 mm forged piston kit, specifically crafted for Gas Gas and Yamaha engines. Designed to meet the highest performance standards, this piston kit ensures durability and efficiency for all...09100373- SKU:
- 09100373
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
$239.95 -
Wiseco Piston Kit 92.00 mm Honda XR500R 1983-1984 4330M09200
WISECO
$239.95Elevate your riding experience with our precision-engineered 92.00 mm forged piston kit. Specifically designed for Honda engines, this piston offers unmatched durability and performance, making it perfect for a variety of riding styles. Experience the...09102903- SKU:
- 09102903
- Availability:
- Ships Same Business Day
- Weight:
- 1.10 LBS
$239.95 -
Wiseco Piston Kit 72.00 mm Suzuki TM250 1972-1975 380M07200
WISECO
$224.95Unlock the full potential of your Suzuki with our premium 72.00 mm Piston Kit. Crafted from a high-silicon alloy, this piston delivers exceptional strength and reliability, making it ideal for both trail and racing enthusiasts. Each kit comes complete...380M07200- SKU:
- 380M07200
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
$224.95 -
WORKS CONNECTION Engine Plug - Blue - Gas Gas/Husqvarna/KTM 24-450
WORKS CONNECTION
$30.95Engine Plug - Blue - Gas Gas/Husqvarna/KTM Precision machined from 6061 T-6 aluminum, Simple positive installation with an Allen wrench, Set of two plugs (unless noted) replaces the stock plugs, Polished to a mirror finish prior to anodizing resulting in...09500977- SKU:
- 09500977
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
$30.95 -
WORKS CONNECTION Engine Plug - Red - Gas Gas/Husqvarna/KTM 24-451
WORKS CONNECTION
$30.95Engine Plug - Red - Gas Gas/Husqvarna/KTM Precision machined from 6061 T-6 aluminum, Simple positive installation with an Allen wrench, Set of two plugs (unless noted) replaces the stock plugs, Polished to a mirror finish prior to anodizing resulting in...09500978- SKU:
- 09500978
- Availability:
- Ships Same Business Day
- Weight:
- 0.03 LBS
$30.95 -
WORKS CONNECTION Engine Plug - Black - Gas Gas/Husqvarna/KTM 24-452
WORKS CONNECTION
$32.95Engine Plug - Black - Gas Gas/Husqvarna/KTM Precision machined from 6061 T-6 aluminum, Simple positive installation with an Allen wrench, Set of two plugs (unless noted) replaces the stock plugs, Polished to a mirror finish prior to anodizing resulting...09500979- SKU:
- 09500979
- Availability:
- Ships Same Business Day
- Weight:
- 0.03 LBS
$32.95 -
WORKS CONNECTION Engine Plug - Orange - Gas Gas/Husqvarna/KTM 24-453
WORKS CONNECTION
$30.95Engine Plug - Orange - Gas Gas/Husqvarna/KTM Precision machined from 6061 T-6 aluminum, Simple positive installation with an Allen wrench, Set of two plugs (unless noted) replaces the stock plugs, Polished to a mirror finish prior to anodizing resulting...09500980- SKU:
- 09500980
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
$30.95 -
WORKS CONNECTION Engine Plug - Silver - Gas Gas/Husqvarna/KTM 24-454
WORKS CONNECTION
$30.95Engine Plug - Silver - Gas Gas/Husqvarna/KTM Precision machined from 6061 T-6 aluminum, Simple positive installation with an Allen wrench, Set of two plugs (unless noted) replaces the stock plugs, Polished to a mirror finish prior to anodizing resulting...09500981- SKU:
- 09500981
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
$30.95 -
WORKS CONNECTION Radiator Drain Plug - Blue - Honda/Kawasaki 24-630
WORKS CONNECTION
$23.95Radiator Drain Plug - Blue - Honda/Kawasaki Direct replacement for the stock plastic plug, CNC machined from billet aluminum to exacting specifications, Laser engraved Works Connection logo on top, Made in the U.S.A09500982- SKU:
- 09500982
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
$23.95 -
WORKS CONNECTION Radiator Drain Plug - Red - Honda/Kawasaki 24-631
WORKS CONNECTION
$23.95Radiator Drain Plug - Red - Honda/Kawasaki Direct replacement for the stock plastic plug, CNC machined from billet aluminum to exacting specifications, Laser engraved Works Connection logo on top, Made in the U.S.A09500983- SKU:
- 09500983
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
$23.95 -
WORKS CONNECTION Radiator Drain Plug - Black - Honda/Kawasaki 24-632
WORKS CONNECTION
$23.95Radiator Drain Plug - Black - Honda/Kawasaki Direct replacement for the stock plastic plug, CNC machined from billet aluminum to exacting specifications, Laser engraved Works Connection logo on top, Made in the U.S.A09500984- SKU:
- 09500984
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
$23.95Qty in Cart: 0Quantity:Price:$23.95Subtotal: -
WORKS CONNECTION Radiator Drain Plug - Green - Honda/Kawasaki 24-633
WORKS CONNECTION
$23.95Radiator Drain Plug - Green - Honda/Kawasaki Direct replacement for the stock plastic plug, CNC machined from billet aluminum to exacting specifications, Laser engraved Works Connection logo on top, Made in the U.S.A09500985- SKU:
- 09500985
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
$23.95Qty in Cart: 0Quantity:Price:$23.95Subtotal: -
WORKS CONNECTION Radiator Drain Plug - Silver - Honda/Kawasaki 24-634
WORKS CONNECTION
$23.95Radiator Drain Plug - Silver - Honda/Kawasaki Direct replacement for the stock plastic plug, CNC machined from billet aluminum to exacting specifications, Laser engraved Works Connection logo on top, Made in the U.S.A09500986- SKU:
- 09500986
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
$23.95 -
Wossner Piston Kit 54.45mm Yamaha YZ125 1998-2001 8091D050
WOSSNER
$122.00Enhance your Yamaha's performance with our premium 54.45 mm Piston Kit. Crafted with advanced engineering techniques, this kit ensures reduced friction and noise while maximizing efficiency and durability. Experience the difference in power and...09104816- SKU:
- 09104816
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
$122.00 -
Wossner Piston Ring 68mm for 1992-1998 Yamaha YZ250 RSB6800
WOSSNER
$18.50Enhance the performance of your 2-stroke engine with the Wossner replacement piston ring, specifically designed for a precise fit with a diameter of 68.00 mm. Crafted with durability in mind, this ring ensures optimal sealing and reduces friction,...09120731- SKU:
- 09120731
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
$18.50 -
Wossner Piston Ring 72.50mm for 1999-2006 Polaris 500 Classic RSB7250
WOSSNER
$18.50Piston Ring - 72.50 mm - RSB7250 Enhance your engine's performance with the RSB7250 piston ring, meticulously crafted for Wossner 2-stroke pistons. This high-quality component combines advanced engineering with durable materials to ensure optimal...09120736- SKU:
- 09120736
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
$18.50
