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
$99.95A broken chain can compromise your engine case, turning a mechanical failure into catastrophic damage. POWERSTANDS Racing's Case Saver shields your powerplant from chain strike debris while replacing...09500777- 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
$99.95A broken chain can destroy an engine case in seconds—this CNC-machined case saver shields your crankcase from catastrophic damage while dramatically improving the appearance of your engine bay...09500787- 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
$99.95A broken chain can catastrophically damage your engine case—leaving you stranded and facing expensive repairs. The POWERSTANDS Racing Case Saver replaces your stock plastic cover with a...09500796- SKU:
- 09500796
- Availability:
- Ships Same Business Day
- Weight:
- 0.76 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
$74.95Automatic cam chain tensioners can introduce timing inconsistencies that compromise engine performance and accelerate wear. The POWERSTANDS RACING Cam Chain Tensioner eliminates this variability by...09251257- SKU:
- 09251257
- Availability:
- Ships Same Business Day
- Weight:
- 0.46 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
$74.95A worn or inconsistent cam chain tensioner can throw your timing off and accelerate internal engine damage—especially under high RPM conditions. The POWERSTANDS RACING Cam Chain Tensioner eliminates...09251258- SKU:
- 09251258
- Availability:
- Ships Same Business Day
- Weight:
- 0.41 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
$74.95OEM cam chain tensioners rely on hydraulic pressure that degrades over time, leading to timing issues, excess wear, and that telltale chain rattle that signals internal damage. The POWERSTANDS RACING...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
$74.95OEM automatic tensioners are a known weak point that can cause timing inconsistencies and premature engine wear over time. The POWERSTANDS RACING Cam Chain Tensioner eliminates these failures with a...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
$25.95A quality drain plug isn't just a fastener—it's essential insurance against oil leaks and engine contamination. The POWERSTANDS Racing Drain Plug combines precision CNC machining with a built-in...09200096- 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
$25.95A quality drain plug is a critical component that's often overlooked—but contamination or debris left in your oil system can compromise engine performance and longevity. The POWERSTANDS RACING Drain...09200097- SKU:
- 09200097
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 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
$25.95Drain plugs are a critical point of failure in high-performance engines—a loose or stripped plug can mean catastrophic oil loss and engine seizure. The POWERSTANDS RACING Drain Plug eliminates...09200102- SKU:
- 09200102
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 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
$25.95A quality drain plug isn't just a fastener—it's insurance against contamination and oil loss during high-performance driving. The POWERSTANDS Racing Drain Plug combines precision engineering with...09200103- 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
$25.95Keeping your drain plug secure during high-rpm operation prevents catastrophic oil loss and engine damage. POWERSTANDS Racing's CNC-machined aluminum drain plug features an embedded magnet to...09200104- 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
$25.95A quality drain plug is fundamental to proper engine maintenance—it's where contaminated oil leaves your engine, so it needs to stay secure and sealed. The POWERSTANDS RACING Drain Plug eliminates...09200105- 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
$25.95 -
POWERSTANDS RACING Drain Plug 00-01945-25
POWERSTANDS RACING
$25.95Engine oil drain plugs endure extreme heat and pressure cycles that can cause standard fasteners to loosen or seize. The POWERSTANDS RACING Drain Plug eliminates this risk with a CNC-machined...09200106- 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
$25.95 -
POWERSTANDS RACING Drain Plug 00-01947-22
POWERSTANDS RACING
$25.95An oil drain plug might seem like a minor component, but a failure mid-race or during a track day can mean catastrophic engine damage and a DNF. The POWERSTANDS RACING Drain Plug eliminates guesswork...09200110- SKU:
- 09200110
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 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
$25.95A quality drain plug might seem like a small detail, but it's one of the most critical connections in your engine bay. The POWERSTANDS RACING Drain Plug keeps your oil sealed tight while the embedded...09200113- SKU:
- 09200113
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 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
$25.95 -
WSM Piston Kit - Sea-Doo - +.5 mm 010-815-05K
WSM
$73.24Stock pistons are a compromise between cost and performance—but your Sea-Doo engine deserves better. WSM Piston Kits deliver OEM-equivalent quality with measurable gains in durability and power...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
$73.24 -
WSM Top-End Rebuild Kit - Original Series - Standard 010-815-10
WSM
$178.77A top-end rebuild is essential for restoring compression, reducing blow-by, and reclaiming lost horsepower after high-mileage or hard racing use. The WSM Original Series kit delivers OEM-quality...01081510- 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
$31.95Front sprocket replacements demand precision assembly, and overlooking the countershaft fasteners can compromise your drivetrain's integrity and longevity. The MOOSE RACING Washer/Snap Ring Counter...09350488- 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
$31.95 -
MOOSE RACING Countershaft Sprocket Seal Kit - KDX 25-4036
MOOSE RACING
$29.95A worn countershaft sprocket seal is a common failure point that leads to oil leakage, contamination, and premature bearing wear. The MOOSE RACING Countershaft Sprocket Seal Kit delivers a complete...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
$29.95
