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Dirt Bike Engine

Dirt Bike Engine

Dirt Bike Engine

Discover a full range of dirt bike engine components for rebuilding or upgrading your performance. 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.

  • Product
  • Qty in Cart
  • Quantity
  • Price
  • Subtotal
  • WORKS CONNECTION Radiator Drain Plug - Green - Honda/Kawasaki 24-633

    WORKS CONNECTION Radiator Drain Plug - Green - Honda/Kawasaki 24-633

    WORKS CONNECTION

    $23.95
    Radiator 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.A
    09500985
    SKU:
    09500985
    Availability:
    Ships Same Business Day
    Weight:
    0.11 LBS
    Qty in Cart: 0
    Quantity:
    Price:
    $23.95
    Subtotal:
  • WORKS CONNECTION Radiator Drain Plug - Silver - Honda/Kawasaki 24-634

    WORKS CONNECTION Radiator Drain Plug - Silver - Honda/Kawasaki 24-634

    WORKS CONNECTION

    $23.95
    Radiator 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.A
    09500986
    SKU:
    09500986
    Availability:
    Ships Same Business Day
    Weight:
    0.10 LBS
    $23.95
    Qty in Cart: 0
    Quantity:
    Price:
    $23.95
    Subtotal:
  • Wossner Piston Kit 54.45mm Yamaha YZ125 1998-2001 8091D050

    Wossner Piston Kit 54.45mm Yamaha YZ125 1998-2001 8091D050

    WOSSNER

    $122.00
    Enhance 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
    Qty in Cart: 0
    Quantity:
    Price:
    $122.00
    Subtotal:
  • Wossner Piston Ring 68mm for 1992-1998 Yamaha YZ250 RSB6800

    Wossner Piston Ring 68mm for 1992-1998 Yamaha YZ250 RSB6800

    WOSSNER

    $18.50
    Enhance 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
    Qty in Cart: 0
    Quantity:
    Price:
    $18.50
    Subtotal:
  • Wossner Piston Ring 72.50mm for 1999-2006 Polaris 500 Classic RSB7250

    Wossner Piston Ring 72.50mm for 1999-2006 Polaris 500 Classic RSB7250

    WOSSNER

    $18.50
    Piston 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:
    0.00 LBS
    $18.50
    Qty in Cart: 0
    Quantity:
    Price:
    $18.50
    Subtotal:
  • Wossner Universal Small End Bearing 16 mm x 20 mm x 19.5 mm N1013

    Wossner Universal Small End Bearing 16 mm x 20 mm x 19.5 mm N1013

    WOSSNER

    $18.50
    Introducing the Top End Bearing, a premium universal needle bearing designed for exceptional performance and durability. Engineered with precision from high-quality materials, this bearing ensures smooth operation and reliability in various applications...
    09240452
    SKU:
    09240452
    Availability:
    Ships Same Business Day
    Weight:
    0.00 LBS
    $18.50
    Qty in Cart: 0
    Quantity:
    Price:
    $18.50
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  • VERTEX Engine Rebuild Kit - KTM 250 SXF/CXF WR101-160

    VERTEX Engine Rebuild Kit - KTM 250 SXF/CXF WR101-160

    VERTEX

    $1,218.95
    Engine Rebuild Kit - KTM 250 SXF/CXF Complete engine rebuild kit, Includes crankshaft, piston kit, complete engine gasket kit with oil seals, main bearings and seals, water pump rebuild kit, transmission bearings, countershaft bushing/seal kit, cam chain...
    09031261
    SKU:
    09031261
    Availability:
    Ships Same Business Day
    Weight:
    1.00 LBS
    $1,218.95
    Qty in Cart: 0
    Quantity:
    Price:
    $1,218.95
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  • VERTEX Engine Rebuild Kit - KTM XC/XC-W 250 | Husqvarna TE250 WR101-091

    VERTEX Engine Rebuild Kit - KTM XC/XC-W 250 | Husqvarna TE250 WR101-091

    VERTEX

    $938.95
    Engine Rebuild Kit - KTM XC/XC-W 250 | Husqvarna TE250 Convenient one-stop shop in a box; nearly all components required for a complete and professional rebuild, Vertex piston kit (standard compression piston, rings, pin and clips), Hot Rods heavy-duty...
    09031066
    SKU:
    09031066
    Availability:
    Ships Same Business Day
    Weight:
    15.20 LBS
    $938.95
    Qty in Cart: 0
    Quantity:
    Price:
    $938.95
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  • On Sale
    Wossner 90.00mm Piston Ring Set for 4-Stroke Engines 900XSY-3

    Wossner 90.00mm Piston Ring Set for 4-Stroke Engines 900XSY-3

    WOSSNER

    MSRP: $38.95
    Now: $25.00
    Was: $38.95
    Upgrade your engine's performance with our high-quality Piston Ring Set designed specifically for Wossner 4-stroke pistons. With a precision fit and durable construction, this replacement ring set ensures optimal sealing and efficiency, enhancing your...
    09120683
    SKU:
    09120683
    Availability:
    Ships Same Business Day
    Weight:
    0.00 LBS
    MSRP: $38.95
    Now: $25.00
    Was: $38.95
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $38.95
    Now: $25.00
    Was: $38.95
    Subtotal:
  • Wossner Piston Ring Set 97.00mm Yamaha YZ450F 2020-2022 970XSY-3

    Wossner Piston Ring Set 97.00mm Yamaha YZ450F 2020-2022 970XSY-3

    WOSSNER

    $41.50
    Upgrade your engine's performance with our high-quality Piston Ring Set designed specifically for the Wossner 4-stroke piston. With a precise fit of 97.00 mm, this replacement ring set ensures optimal sealing and enhanced combustion efficiency...
    09120689
    SKU:
    09120689
    Availability:
    Ships Same Business Day
    Weight:
    0.00 LBS
    $41.50
    Qty in Cart: 0
    Quantity:
    Price:
    $41.50
    Subtotal:
  • MOOSE OFFROAD Cylinder - 66.40 mm - Yamaha MSE20009 MOOSE OFFROAD Cylinder - 66.40 mm - Yamaha MSE20009

    MOOSE OFFROAD Cylinder - 66.40 mm - Yamaha MSE20009

    MOOSE OFFROAD

    $597.95
    Cylinder - 66.40 mm - Yamaha Precision diamond honed to exact bore dimension and proper surface finish to ensure ring and oil retention, Extremely durable low-friction bore surface allows for greater heat dissipation, Made from cast aluminum; nickel...
    09311074
    SKU:
    09311074
    Availability:
    Ships Same Business Day
    Weight:
    6.15 LBS
    $597.95
    Qty in Cart: 0
    Quantity:
    Price:
    $597.95
    Subtotal:
  • HOT RODS Crankshaft - OEM Stroke - Polaris HR00046

    HOT RODS Crankshaft - OEM Stroke - Polaris HR00046

    HOT RODS

    $1,104.95
    Crankshaft - OEM Stroke - Polaris Factory trued and balanced, OEM crankshaft replacement, Crankshaft only, connecting rods sold separately
    09210888
    SKU:
    09210888
    Availability:
    Ships Same Business Day
    Weight:
    19.65 LBS
    $1,104.95
    Qty in Cart: 0
    Quantity:
    Price:
    $1,104.95
    Subtotal:
  • ATHENA Water Pump Gasket Kit - Yamaha P400485475014

    ATHENA Water Pump Gasket Kit - Yamaha P400485475014

    ATHENA

    $54.95
    Water Pump Gasket Kit - Yamaha Includes water pump gasket, clutch cover gasket, water pump shaft oil seals, washers and bearings when applicable, Kit contents will vary slightly based on application
    09347194
    SKU:
    09347194
    Availability:
    Ships Same Business Day
    Weight:
    0.20 LBS
    Qty in Cart: 0
    Quantity:
    Price:
    $54.95
    Subtotal:
  • KIBBLEWHITE Spring Kit 30-33600

    KIBBLEWHITE Spring Kit 30-33600

    KIBBLEWHITE

    $213.03
    Spring Kit 30-33600 Enhanced spring rates for improved performance High lift compatibility for optimal engine efficiency Ideal for boosted or turbocharged applications CNC-machined titanium retainers ensure durability Cr-Si dual...
    09263377
    SKU:
    09263377
    Availability:
    Ships Same Business Day
    Weight:
    0.75 LBS
    $213.03
    Qty in Cart: 0
    Quantity:
    Price:
    $213.03
    Subtotal:
  • KIBBLEWHITE Valve Kit - Intake 30-34000

    KIBBLEWHITE Valve Kit - Intake 30-34000

    KIBBLEWHITE

    $184.09
    Valve Kit - Intake Full set of Black Diamond* stainless steel standard size valves for engine applications listed, All valves are impregnated by a special process to a depth of .002* with a surface buildup of .0002*, This process improves wear...
    09263378
    SKU:
    09263378
    Availability:
    Ships Same Business Day
    Weight:
    0.70 LBS
    $184.09
    Qty in Cart: 0
    Quantity:
    Price:
    $184.09
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  • KIBBLEWHITE Valve - Intake - Black Diamond* 30-33612

    KIBBLEWHITE Valve - Intake - Black Diamond* 30-33612

    KIBBLEWHITE

    $37.55
    Valve - Intake - Black Diamond* Black Diamond* valves are CNC machined from one-piece forgings of EV8 Stainless Steel, Black Diamond* proprietary multi-stage process reduces friction, and provides superior resistance to corrosion and wear, Made in the U...
    09263379
    SKU:
    09263379
    Availability:
    Ships Same Business Day
    Weight:
    0.20 LBS
    $37.55
    Qty in Cart: 0
    Quantity:
    Price:
    $37.55
    Subtotal:
  • KIBBLEWHITE Valve - Exhaust - Black Diamond* 30-33616

    KIBBLEWHITE Valve - Exhaust - Black Diamond* 30-33616

    KIBBLEWHITE

    $37.55
    Valve - Exhaust - Black Diamond* Black Diamond* valves are CNC machined from one-piece forgings of EV8 Stainless Steel, Black Diamond* proprietary multi-stage process reduces friction, and provides superior resistance to corrosion and wear, Made in the U...
    09263380
    SKU:
    09263380
    Availability:
    Ships Same Business Day
    Weight:
    0.21 LBS
    $37.55
    Qty in Cart: 0
    Quantity:
    Price:
    $37.55
    Subtotal:
  • KIBBLEWHITE Valve Guide - Intake - Standard 30-33620

    KIBBLEWHITE Valve Guide - Intake - Standard 30-33620

    KIBBLEWHITE

    $24.89
    Valve Guide - Intake - Standard All valve guides are made of Ampco-45, a high-performance compound with 80% copper content to provide great heat conductivity and 5% nickel content for wear resistance, Made in the U.S.A.
    09263381
    SKU:
    09263381
    Availability:
    Ships Same Business Day
    Weight:
    0.26 LBS
    $24.89
    Qty in Cart: 0
    Quantity:
    Price:
    $24.89
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  • KIBBLEWHITE Valve Guide - Intake - +0.010" 30-33629

    KIBBLEWHITE Valve Guide - Intake - +0.010" 30-33629

    KIBBLEWHITE

    $24.89
    Valve Guide - Intake - +0.010" All valve guides are made of Ampco-45, a high-performance compound with 80% copper content to provide great heat conductivity and 5% nickel content for wear resistance, Made in the U.S.A.
    09263382
    SKU:
    09263382
    Availability:
    Ships Same Business Day
    Weight:
    0.26 LBS
    $24.89
    Qty in Cart: 0
    Quantity:
    Price:
    $24.89
    Subtotal:
  • KIBBLEWHITE Valve Guide - Exhaust - Standard 30-33630

    KIBBLEWHITE Valve Guide - Exhaust - Standard 30-33630

    KIBBLEWHITE

    $24.89
    Valve Guide - Exhaust - Standard 30-33630 Constructed from Ampco-45 for exceptional durability and performance. 80% copper content ensures superior heat conductivity. 5% nickel content enhances wear resistance for long-lasting use. ...
    09263383
    SKU:
    09263383
    Availability:
    Ships Same Business Day
    Weight:
    0.25 LBS
    $24.89
    Qty in Cart: 0
    Quantity:
    Price:
    $24.89
    Subtotal:
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Dirt Bike Engine Parts

Keep your dirt bike running smoothly and prolong the life of its engine with essential general maintenance. But when parts start to break down, don't let it stop you from getting out on the trails! JJ Motorsports has all that you need for minor jobs like oil changes or major overhauls such as a complete rebuild - carrying top aftermarket brands . Get back in gear faster by shopping our full line of high-quality dirt bike engine parts here today at JJ Motorsports!

 

At JJ Motorsports, we want to make sure you don't miss out on the ride! If your motor has blown or radiator smashed, our gearheads can help get you back in the seat. We carry piston kits from top brands like Wiseco and Wrench Rabbit engine kits so that riders have access to a wide range of parts for their dirt bike engine rebuilds. Plus – with gaskets at-the-ready when it comes time for any leakages - no need to worry about maintenance issues either; simply stay up on oil & filter changes and let us take care of everything else. Got queries? Just give one of our knowledgeable staff members a call at 1-231‐767‐5055 where they'll be more than happy provide advice, instructions and tailored answers catered just for YOU!