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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MOOSE RACING Countershaft Sprocket Seal Kit - Suzuki 25-4025
MOOSE RACING
$22.95Kits include hardened steel bushing, an upgraded seal, an O-ring (where applicable) and a snap ring or lock washer (where applicable), Made in the U.S.A.09350450- SKU:
- 09350450
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- PRODUCT NAME:
- SEAL KIT
- UNITS:
- KIT
- APPLICATION:
- COUNTERSHAFT
- RIDING STYLE:
- STREET
- RIDING STYLE:
- OFF-ROAD
$22.95Qty in Cart: 0Quantity:Price:$22.95Subtotal: -
MOOSE RACING Countershaft Sprocket Seal Kit - Suzuki 25-4027
MOOSE RACING
$23.95Kits include hardened steel bushing, an upgraded seal, an O-ring (where applicable) and a snap ring or lock washer (where applicable), Made in the U.S.A.09350452- SKU:
- 09350452
- Availability:
- Ships Same Business Day
- Weight:
- 0.14 LBS
- APPLICATION:
- COUNTERSHAFT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- SEAL KIT
$23.95Qty in Cart: 0Quantity:Price:$23.95Subtotal: -
MOOSE RACING Ring Set - For 96 mm Piston CPN2-2-3779
MOOSE RACING
$35.95Made in the U.S.A., Be sure to use race fuel with some applications09120754- SKU:
- 09120754
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
- PISTON SIZE METRIC:
- STANDARD
- UNITS:
- SET
- PRODUCT NAME:
- PISTON RING
- RIDING STYLE:
- OFF-ROAD
$35.95Qty in Cart: 0Quantity:Price:$35.95Subtotal: -
MOOSE RACING Complete Motor Gasket Kit - XR400 808265
MOOSE RACING
$87.31Moose can now handle all your gasket and seal needs at a fraction of OEM cost., High-tech materials provide unmatched reliability and performance, Rebuild the engine and transmission with total confidence as each set is designed for durability and...M808265- SKU:
- M808265
- Availability:
- Ships Same Business Day
- Weight:
- 0.26 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- TYPE:
- ENGINE
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
$87.31Qty in Cart: 0Quantity:Price:$87.31Subtotal: -
VESRAH Complete Gasket Kit - XL 250 VG-142
VESRAH
$64.85Complete Gasket Set VG142 Includes all essential engine gaskets for a full rebuild. Comes with o-rings and valve guide oil seals for optimal performance. Specifically designed for top-end rebuilds with complete gasket coverage. Sold...VG142- SKU:
- VG142
- Availability:
- Ships Same Business Day
- Weight:
- 0.32 LBS
- TYPE:
- COMPLETE
- UNITS:
- SET
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
$64.85Qty in Cart: 0Quantity:Price:$64.85Subtotal: -
VESRAH Complete Gasket Kit - PW80 VG-2022
VESRAH
$22.95Complete 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...VG2022- SKU:
- VG2022
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- SET
- PRODUCT NAME:
- GASKET
$22.95Qty in Cart: 0Quantity:Price:$22.95Subtotal: -
On Sale
VESRAH Complete Gasket Kit - TT/XT 350 VG-2062-M
VESRAH
MSRP: $133.95Now: $88.00Was: $133.95Complete Gasket Set VG2062M Includes all essential engine gaskets for a full rebuild. Comes with necessary o-rings for optimal sealing. Features valve guide oil seals to ensure proper lubrication. Top-end gasket set available for...VG2062- SKU:
- VG2062
- Availability:
- Ships Same Business Day
- Weight:
- 0.44 LBS
- UNITS:
- SET
- TYPE:
- COMPLETE
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
MSRP: $133.95Now: $88.00Was: $133.95Qty in Cart: 0Quantity:Price:MSRP: $133.95Now: $88.00Was: $133.95Subtotal: -
VESRAH Complete Gasket Kit - DT/GT/MX80 VG-248
VESRAH
$23.06Complete Gasket Set VG248 Includes all essential engine gaskets for a comprehensive rebuild. Comes with o-rings and valve guide oil seals for optimal performance. Top-end gasket sets specifically designed for top-end rebuilds. Sold...VG248- SKU:
- VG248
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- TYPE:
- COMPLETE
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- UNITS:
- SET
$23.06Qty in Cart: 0Quantity:Price:$23.06Subtotal: -
MOOSE RACING Carb Mid Body Gasket Kit 26-1512
MOOSE RACING
$28.95Kit includes all of the necessary components to reseal a FCR carburetor at its center section, Components not available OEM, Kit includes replacement gaskets, O-rings, screws and special tool (if necessary)09351011- SKU:
- 09351011
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- APPLICATION:
- CARBURETOR
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- GASKET KIT
- UNITS:
- KIT
$28.95Qty in Cart: 0Quantity:Price:$28.95Subtotal: -
MOOSE RACING Carb Mid Body Gasket Kit 26-1511
MOOSE RACING
$26.95Kit includes all of the necessary components to reseal a FCR carburetor at its center section., Components not available from OEM., Kit includes replacement gaskets, O-rings, screws and specialty tool (if necessary)09351012- SKU:
- 09351012
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- APPLICATION:
- CARBURETOR
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$26.95Qty in Cart: 0Quantity:Price:$26.95Subtotal: -
MOOSE RACING Water Pump Rebuild Kit 821407
MOOSE RACING
$46.49Include every gasket, O-ring, bearing and seal required to rebuild a water pump, Typical kit includes the following: bearings where applicable; rubber seals; mechanical water pump seal where applicable; side cover gasket; water pump gasket; snap rings...09345213- SKU:
- 09345213
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP
- UNITS:
- KIT
- PRODUCT NAME:
- REPAIR KIT
$46.49Qty in Cart: 0Quantity:Price:$46.49Subtotal: -
MOOSE RACING Piston Kit - 71.95 mm MSE23375B
MOOSE RACING
$141.95Gravity cast aluminum alloy with 18% silicon to increase resistance to wear and decrease thermal distortion, thus providing a longer piston life, Coated skirts ease break-in, decreasing wear and aiding in lubrication, Wear-resistant piston rings, Wrist...09102714- SKU:
- 09102714
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- UNITS:
- KIT
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- OFF-ROAD
- PISTON DIAMETER METRIC:
- 71.95 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
$141.95Qty in Cart: 0Quantity:Price:$141.95Subtotal: -
MOOSE RACING Wrist Pin W748-200015CP1C
MOOSE RACING
$30.95Wrist pins are nitride-coated, providing a hardened, wear-resistant bearing surface09130063- SKU:
- 09130063
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- WRIST PIN
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- PISTON
- STYLE:
- 4-STROKE
- UNITS:
- EACH
$30.95Qty in Cart: 0Quantity:Price:$30.95Subtotal: -
MOOSE RACING Clutch Cylinder Guard - KTM 13-097
MOOSE RACING
$42.95CNC-machined aluminum is black anodized and contrast cut for stylish, functional protection, Specialized applications guard hydraulic clutch cylinders and feature knockdown bars to keep your chain in check, Mounting hardware included, Made in the U.S.A.09500194- SKU:
- 09500194
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- STREET
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- CASE SAVER
- TYPE:
- SLAVE CYLINDER
- COLOR/FINISH:
- ANODIZED
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$42.95Qty in Cart: 0Quantity:Price:$42.95Subtotal: -
VESRAH Top End Gasket Kit - XL/R 75/80 VG-5034
VESRAH
$45.05Complete Gasket Set VG5034 Includes all essential engine gaskets for a full rebuild. Contains o-rings and valve guide oil seals for optimal performance. Top-end gasket sets available for comprehensive top-end repairs. Sold individually...VG5034- SKU:
- VG5034
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- GASKET
- TYPE:
- TOP END
- UNITS:
- SET
$45.05Qty in Cart: 0Quantity:Price:$45.05Subtotal: -
VESRAH Top End Gasket Kit - XL/XR 600R VG-5081-M
VESRAH
$149.73Complete Gasket Set VG5081M Includes all essential engine gaskets for a complete rebuild. Comes with o-rings and valve guide oil seals for optimal performance. Top-end gasket sets available for specific top-end rebuilds. Each set is sold...VG5081- SKU:
- VG5081
- Availability:
- Ships Same Business Day
- Weight:
- 0.38 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- SET
- PRODUCT NAME:
- GASKET
$149.73Qty in Cart: 0Quantity:Price:$149.73Subtotal: -
WSM Piston Kit - Kawasaki 900 - Standard 010-840K
WSM
$76.57Quality and construction that meets or exceeds OEM, Feature improved E-clip design, Contain piston, rings, pin and clips, Additional rings available separately, Order one per cylinder, Skirts have a nonabrasive, expansion-retarding MOS2 coating to reduce...010840- SKU:
- 010840
- Availability:
- Ships Same Business Day
- Weight:
- 0.95 LBS
- BORE SIZE METRIC:
- 73.00 MM
- PRODUCT NAME:
- PISTON KIT
- PISTON MATERIAL:
- ALUMINUM
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- MODEL:
- ORIGINAL
- RIDING STYLE:
- WATERCRAFT
- UNITS:
- KIT
$76.57Qty in Cart: 0Quantity:Price:$76.57Subtotal: -
WSM Piston Rings 010-917-05
WSM
$41.33Order one per cylinder01091705- SKU:
- 01091705
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- BORE - OVERSIZE METRIC:
- +0.50 MM
- PRODUCT NAME:
- PISTON RING
- UNITS:
- SET
- PISTON MATERIAL:
- ALUMINUM
- RIDING STYLE:
- WATERCRAFT
- BORE - OVERSIZE:
- +0,50 MM
$41.33Qty in Cart: 0Quantity:Price:$41.33Subtotal: -
MOOSE RACING Crankcase Bearing and Seal Kit 24-1009
MOOSE RACING
$93.95Precision crank bearings, Kits contain right and left crankshaft bearings; 2-stroke kits contain outer seals, Seals designed with a fluorocarbon lip to reduce dry start friction on 2-stroke engines, 4-stroke crank bearings do not include sealsA241009- SKU:
- A241009
- Availability:
- Ships Same Business Day
- Weight:
- 1.25 LBS
- TYPE:
- CRANK
- PRODUCT NAME:
- BEARING KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$93.95Qty in Cart: 0Quantity:Price:$93.95Subtotal: -
MOOSE RACING Crankcase Bearing and Seal Kit 24-1014
MOOSE RACING
$69.95Precision crank bearings, Kits contain right and left crankshaft bearings; 2-stroke kits contain outer seals, Seals designed with a fluorocarbon lip to reduce dry start friction on 2-stroke engines, 4-stroke crank bearings do not include sealsA241014- SKU:
- A241014
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- TYPE:
- CRANK
- PRODUCT NAME:
- BEARING KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$69.95Qty in Cart: 0Quantity:Price:$69.95Subtotal:
