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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POWERSTANDS RACING Case Saver/Sprocket Cover - Red 03-04153-24
POWERSTANDS RACING
$99.95Tough protection against broken chain from cracking engine cases, Machined lightweight design, Look so much better than stock cover, Replace OEM plastic sprocket cover, Anodized finish09500777- SKU:
- 09500777
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- COLOR/FINISH:
- RED
- PRODUCT NAME:
- CASE SAVER
- TYPE:
- ENGINE
- PRODUCT NAME:
- SPROCKET COVER
- UNITS:
- EACH
- COLOR/FINISH:
- ANODIZED
- RIDING STYLE:
- OFF-ROAD
$99.95Qty in Cart: 0Quantity:Price:$99.95Subtotal: -
POWERSTANDS RACING Case Saver/Sprocket Cover Gun - Metal 05-04152-29
POWERSTANDS RACING
$99.95Tough protection against broken chain from cracking engine cases, Machined lightweight design, Look so much better than stock cover, Replace OEM plastic sprocket cover, Anodized finish09500787- SKU:
- 09500787
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
- COLOR/FINISH:
- GUNMETAL
- PRODUCT NAME:
- SPROCKET COVER
- TYPE:
- ENGINE
- UNITS:
- EACH
- PRODUCT NAME:
- CASE SAVER
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- ANODIZED
- RIDING STYLE:
- OFF-ROAD
$99.95Qty in Cart: 0Quantity:Price:$99.95Subtotal: -
POWERSTANDS RACING Case Saver/Sprocket Cover - Blue 07-04154-25
POWERSTANDS RACING
$99.95Tough protection against broken chain from cracking engine cases, Machined lightweight design, Look so much better than stock cover, Replace OEM plastic sprocket cover, Anodized finish09500796- SKU:
- 09500796
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- PRODUCT NAME:
- SPROCKET COVER
- UNITS:
- EACH
- PRODUCT NAME:
- CASE SAVER
- TYPE:
- ENGINE
- COLOR/FINISH:
- ANODIZED
- COLOR/FINISH:
- BLUE
- RIDING STYLE:
- OFF-ROAD
$99.95Qty in Cart: 0Quantity:Price:$99.95Subtotal: -
POWERSTANDS RACING Cam Chain Tensioner - MX GM 08-02001-28
POWERSTANDS RACING
$74.95Made from billet aluminum, Remove out-of-timing problems, premature engine wear and excess tension caused by an automatic tensioner, Gunmetal-finish09251257- SKU:
- 09251257
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- CAM CHAIN TENSIONER
$74.95Qty in Cart: 0Quantity:Price:$74.95Subtotal: -
POWERSTANDS RACING Cam Chain Tensioner - MX GM 03-02008-29
POWERSTANDS RACING
$74.95Made from billet aluminum, Remove out-of-timing problems, premature engine wear and excess tension caused by an automatic tensioner, Gunmetal-finish09251258- SKU:
- 09251258
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- PRODUCT NAME:
- CAM CHAIN TENSIONER
- RIDING STYLE:
- STREET
$74.95Qty in Cart: 0Quantity:Price:$74.95Subtotal: -
POWERSTANDS RACING Cam Chain Tensioner 03-02002-29
POWERSTANDS RACING
$74.95CNC-machined from billet aluminum with a gunmetal finish, Replaces OEM automatic/hydraulic tensioner, Eliminates out-of-timing problems caused by the OEM automatic tensioner, Eliminates excess tension/premature engine wear caused by OEM hydraulic...09250788- SKU:
- 09250788
- Availability:
- Ships Same Business Day
- Weight:
- 0.55 LBS
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- TENSIONER
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CAM CHAIN
- RIDING STYLE:
- ATV
- TYPE:
- MANUAL
- UNITS:
- EACH
$74.95Qty in Cart: 0Quantity:Price:$74.95Subtotal: -
POWERSTANDS RACING Cam Chain Tensioner 05-02001-29
POWERSTANDS RACING
$74.95CNC-machined from billet aluminum with a gunmetal finish, Replaces OEM automatic/hydraulic tensioner, Eliminates out-of-timing problems caused by the OEM automatic tensioner, Eliminates excess tension/premature engine wear caused by OEM hydraulic...09250794- SKU:
- 09250794
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
- MATERIAL:
- ALUMINUM
- UNITS:
- EACH
- PRODUCT NAME:
- TENSIONER
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CAM CHAIN
- TYPE:
- MANUAL
$74.95Qty in Cart: 0Quantity:Price:$74.95Subtotal: -
POWERSTANDS RACING Drain Plug 00-01940-24
POWERSTANDS RACING
$25.95Bolts are CNC machined from high-quality aluminum, Embedded magnet helps keep bolt in place, Predrilled holes make for easy installation of safety wires09200096- SKU:
- 09200096
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- COLOR/FINISH:
- RED
- MATERIAL:
- ALUMINUM
- TYPE:
- OIL DRAIN
- FEATURES:
- MAGNETIC
- DIAMETER - THREAD SIZE METRIC:
- M8 X 1.25 X 24 MM
- PRODUCT NAME:
- BOLT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
$25.95Qty in Cart: 0Quantity:Price:$25.95Subtotal: -
POWERSTANDS RACING Drain Plug 00-01941-22
POWERSTANDS RACING
$25.95Bolts are CNC machined from high-quality aluminum, Embedded magnet helps keep bolt in place, Predrilled holes make for easy installation of safety wires09200097- SKU:
- 09200097
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- COLOR/FINISH:
- BLACK
- DIAMETER - THREAD SIZE METRIC:
- M8 X 1.25 X 12 MM
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- FEATURES:
- MAGNETIC
- PRODUCT NAME:
- BOLT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- OIL DRAIN
- UNITS:
- EACH
$25.95Qty in Cart: 0Quantity:Price:$25.95Subtotal: -
POWERSTANDS RACING Drain Plug 00-01943-22
POWERSTANDS RACING
$25.95Bolts are CNC machined from high-quality aluminum, Embedded magnet helps keep bolt in place, Predrilled holes make for easy installation of safety wires09200102- SKU:
- 09200102
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- DIAMETER - THREAD SIZE METRIC:
- M8 X 1.50 X 17 MM
- FEATURES:
- MAGNETIC
- TYPE:
- OIL DRAIN
- COLOR/FINISH:
- BLACK
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- PRODUCT NAME:
- BOLT
- RIDING STYLE:
- OFF-ROAD
$25.95Qty in Cart: 0Quantity:Price:$25.95Subtotal: -
POWERSTANDS RACING Drain Plug 00-01943-25
POWERSTANDS RACING
$25.95Bolts are CNC machined from high-quality aluminum, Embedded magnet helps keep bolt in place, Predrilled holes make for easy installation of safety wires09200103- SKU:
- 09200103
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- DIAMETER - THREAD SIZE METRIC:
- M8 X 1.50 X 17 MM
- FEATURES:
- MAGNETIC
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- TYPE:
- OIL DRAIN
- COLOR/FINISH:
- BLUE
- PRODUCT NAME:
- BOLT
- RIDING STYLE:
- OFF-ROAD
$25.95Qty in Cart: 0Quantity:Price:$25.95Subtotal: -
POWERSTANDS RACING Drain Plug 00-01944-22
POWERSTANDS RACING
$25.95Bolts are CNC machined from high-quality aluminum, Embedded magnet helps keep bolt in place, Predrilled holes make for easy installation of safety wires09200104- SKU:
- 09200104
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- DIAMETER - THREAD SIZE METRIC:
- M10 X 1.50 X 22 MM
- FEATURES:
- MAGNETIC
- MATERIAL:
- ALUMINUM
- TYPE:
- OIL DRAIN
- COLOR/FINISH:
- BLACK
- PRODUCT NAME:
- BOLT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
$25.95Qty in Cart: 0Quantity:Price:$25.95Subtotal: -
POWERSTANDS RACING Drain Plug 00-01945-22
POWERSTANDS RACING
$25.95Bolts are CNC machined from high-quality aluminum, Embedded magnet helps keep bolt in place, Predrilled holes make for easy installation of safety wires09200105- SKU:
- 09200105
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- FEATURES:
- MAGNETIC
- TYPE:
- OIL DRAIN
- COLOR/FINISH:
- BLACK
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- DIAMETER - THREAD SIZE METRIC:
- M12 X 1.25 X 17 MM
- PRODUCT NAME:
- BOLT
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
$25.95Qty in Cart: 0Quantity:Price:$25.95Subtotal: -
POWERSTANDS RACING Drain Plug 00-01945-25
POWERSTANDS RACING
$25.95Bolts are CNC machined from high-quality aluminum, Embedded magnet helps keep bolt in place, Predrilled holes make for easy installation of safety wires09200106- SKU:
- 09200106
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- FEATURES:
- MAGNETIC
- MATERIAL:
- ALUMINUM
- TYPE:
- OIL DRAIN
- DIAMETER - THREAD SIZE METRIC:
- M12 X 1.25 X 17 MM
- COLOR/FINISH:
- BLUE
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- BOLT
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
$25.95Qty in Cart: 0Quantity:Price:$25.95Subtotal: -
POWERSTANDS RACING Drain Plug 00-01947-22
POWERSTANDS RACING
$25.95Bolts are CNC machined from high-quality aluminum, Embedded magnet helps keep bolt in place, Predrilled holes make for easy installation of safety wires09200110- SKU:
- 09200110
- Availability:
- Ships Same Business Day
- Weight:
- 0.18 LBS
- TYPE:
- OIL DRAIN
- COLOR/FINISH:
- BLACK
- DIAMETER - THREAD SIZE METRIC:
- M12 X 1.50 X 21 MM
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- PRODUCT NAME:
- BOLT
- RIDING STYLE:
- OFF-ROAD
$25.95Qty in Cart: 0Quantity:Price:$25.95Subtotal: -
POWERSTANDS RACING Drain Plug 00-01948-22
POWERSTANDS RACING
$25.95Bolts are CNC machined from high-quality aluminum, Embedded magnet helps keep bolt in place, Predrilled holes make for easy installation of safety wires09200113- SKU:
- 09200113
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- MATERIAL:
- ALUMINUM
- TYPE:
- OIL DRAIN
- COLOR/FINISH:
- BLACK
- DIAMETER - THREAD SIZE METRIC:
- M14 X 1.25
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- BOLT
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
$25.95Qty in Cart: 0Quantity:Price:$25.95Subtotal: -
WSM Piston Kit - Sea-Doo - +.5 mm 010-815-05K
WSM
$69.75Quality 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...01081505- SKU:
- 01081505
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
- BORE - OVERSIZE METRIC:
- +0.50 MM
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- WATERCRAFT
- BORE - OVERSIZE:
- +0,50 MM
- MODEL:
- ORIGINAL
- PISTON MATERIAL:
- ALUMINUM
- UNITS:
- KIT
- BORE SIZE METRIC:
- 76.00 MM
$69.75Qty in Cart: 0Quantity:Price:$69.75Subtotal: -
WSM Top-End Rebuild Kit - Original Series - Standard 010-815-10
WSM
$178.77Top-quality piston kits, Include pistons, rings, pins, clips, racing needle bearings, head and base gaskets, intake and exhaust gaskets01081510- SKU:
- 01081510
- Availability:
- Ships Same Business Day
- Weight:
- 2.35 LBS
- BORE - OVERSIZE:
- STANDARD
- PRODUCT NAME:
- REBUILD KIT
- UNITS:
- EACH
- BORE SIZE METRIC:
- 76.00 MM
- BORE - OVERSIZE METRIC:
- STANDARD
- PISTON MATERIAL:
- ALUMINUM
- MODEL:
- ORIGINAL SERIES
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- TOP END
$178.77Qty in Cart: 0Quantity:Price:$178.77Subtotal: -
MOOSE RACING Washer/Snap Ring Counter Shaft 25-6006
MOOSE RACING
$31.95Always have the countershaft lock-washers and snap rings on hand for a front sprocket replacement09350488- SKU:
- 09350488
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- PRODUCT NAME:
- WASHER
- UNITS:
- 10 PACK
- APPLICATION:
- COUNTERSHAFT
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- STREET
$31.95Qty in Cart: 0Quantity:Price:$31.95Subtotal: -
MOOSE RACING Countershaft Sprocket Seal Kit - KDX 25-4036
MOOSE RACING
$29.95Kits 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.09350841- SKU:
- 09350841
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- SEAL KIT
- APPLICATION:
- COUNTERSHAFT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$29.95Qty in Cart: 0Quantity:Price:$29.95Subtotal:
