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 Crank Bearing - Husqvarna 24-1107
MOOSE RACING
$74.95A worn or damaged crankshaft bearing directly impacts engine reliability and power delivery on your 2-stroke. This MOOSE RACING kit restores proper crankshaft support and reduces parasitic friction from day one, giving you the dependable performance...09240228- SKU:
- 09240228
- Availability:
- Ships Same Business Day
- Weight:
- 1.12 LBS
- RIDING STYLE:
- STREET
- UNITS:
- KIT
- APPLICATION:
- CRANKSHAFT
- PRODUCT NAME:
- BEARING
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- BALL
$74.95 -
MOOSE RACING Crank Bearing - Husqvarna 24-1108
MOOSE RACING
$77.95A properly functioning crankshaft is the foundation of reliable 2-stroke performance, and worn bearings compromise both power delivery and engine longevity. The MOOSE RACING Crank Bearing kit restores factory precision tolerances while the...09240229- SKU:
- 09240229
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- APPLICATION:
- CRANKSHAFT
- PRODUCT NAME:
- BEARING
- TYPE:
- BALL
- RIDING STYLE:
- STREET
$77.95 -
MOOSE RACING Crank Bearing - PW50 24-1061
MOOSE RACING
$41.95A worn crankshaft bearing is one of the fastest ways to lose power and reliability in a 2-stroke engine. The MOOSE RACING Crank Bearing Kit (24-1061) replaces both left and right bearings with precision-matched components, restoring smooth rotation and...09240237- SKU:
- 09240237
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- RIDING STYLE:
- STREET
- APPLICATION:
- CRANKSHAFT
- PRODUCT NAME:
- BEARING
- TYPE:
- BALL
$41.95 -
MOOSE RACING Crank Bearing - Gas Gas 24-1115
MOOSE RACING
$160.95A worn or failing crankshaft bearing will tank your engine's reliability and performance faster than a seized piston. The MOOSE RACING Crank Bearing Kit (Gas Gas 24-1115) delivers precision-engineered bearings with advanced seals that reduce friction on...09240290- SKU:
- 09240290
- Availability:
- Ships Same Business Day
- Weight:
- 1.25 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- APPLICATION:
- CRANKSHAFT
- PRODUCT NAME:
- BEARING
- TYPE:
- BALL
- RIDING STYLE:
- STREET
$160.95 -
MOOSE RACING Water Pump Rebuild Kit 821302
MOOSE RACING
$63.04A failing water pump compromises your engine's cooling efficiency and puts your entire drivetrain at risk. Rather than replacing the entire assembly, this MOOSE Racing rebuild kit lets you restore your water pump to OEM specifications with a complete set...09345192- SKU:
- 09345192
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP
- UNITS:
- KIT
- PRODUCT NAME:
- REPAIR KIT
$63.04 -
MOOSE RACING Water Pump Rebuild Kit 821312
MOOSE RACING
$56.37A failing water pump can compromise your engine's cooling efficiency and derail your race day or project timeline. This MOOSE RACING rebuild kit gives you everything needed to restore your water pump to OEM specifications without the cost and lead time...09345194- SKU:
- 09345194
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- REPAIR KIT
- TYPE:
- WATER PUMP
- UNITS:
- KIT
$56.37 -
MOOSE RACING Water Pump Rebuild Kit 821318
MOOSE RACING
$35.70A failing water pump can catastrophically compromise engine cooling and cost thousands in repairs. This MOOSE RACING rebuild kit lets you restore your water pump to OEM specifications with all gaskets, seals, and bearings in one package—eliminating the...09345196- SKU:
- 09345196
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- PRODUCT NAME:
- REPAIR KIT
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- WATER PUMP
$35.70 -
MOOSE RACING Water Pump Rebuild Kit 821319
MOOSE RACING
$46.30A failing water pump can leave you stranded mid-season, compromising engine cooling and risking catastrophic damage. The MOOSE RACING Water Pump Rebuild Kit 821319 gives you everything needed to restore your pump to OEM specifications without the cost of...09345197- SKU:
- 09345197
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- PRODUCT NAME:
- REPAIR KIT
- TYPE:
- WATER PUMP
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$46.30 -
VESRAH Complete Gasket Kit - YZ 85 VG-2149
VESRAH
$44.35A complete engine rebuild demands precision gaskets that seal under extreme combustion pressures—compromised seals lead to oil leaks, lost compression, and catastrophic engine failure. The VESRAH Complete Gasket Kit VG-2149 delivers OEM-equivalent...09340963- SKU:
- 09340963
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- SET
$44.35 -
WSM Piston Rings 010-920-05
WSM
$36.88Piston rings are critical to engine performance—they seal combustion pressure, regulate oil consumption, and directly impact horsepower delivery and engine longevity. Worn or inadequate rings result in blow-by, loss of compression, and excessive oil...01092005- SKU:
- 01092005
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- BORE - OVERSIZE METRIC:
- +0.50 MM
- UNITS:
- SET
- BORE - OVERSIZE:
- +0,50 MM
- PISTON MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- PISTON RING
- RIDING STYLE:
- WATERCRAFT
$36.88 -
WSM Piston Rings 010-925
WSM
$24.97Piston rings are critical to engine performance—they seal combustion pressure, manage oil consumption, and directly impact power output and longevity. WSM Piston Rings 010-925 deliver consistent compression and reduced blow-by, essential whether you're...010925- SKU:
- 010925
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- PRODUCT NAME:
- PISTON RING
- RIDING STYLE:
- WATERCRAFT
- PISTON MATERIAL:
- ALUMINUM
- UNITS:
- SET
$24.97 -
WSM Piston Rings 010-925-04
WSM
$24.97Piston rings are critical to engine performance—they seal combustion pressure, regulate oil consumption, and maintain compression in your cylinder. Worn or substandard rings directly kill horsepower, increase blowby, and accelerate engine wear. WSM...01092504- SKU:
- 01092504
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- PISTON MATERIAL:
- ALUMINUM
- BORE - OVERSIZE METRIC:
- +0.25 MM
- RIDING STYLE:
- WATERCRAFT
- PRODUCT NAME:
- PISTON RING
- BORE - OVERSIZE:
- +0,25 MM
- UNITS:
- SET
$24.97 -
WSM Piston Rings 010-925-05
WSM
$24.97Piston rings are critical to engine performance—they create the seal between pistons and cylinder walls that maintains compression, controls oil consumption, and prevents blowby. WSM Piston Rings deliver consistent sealing across the entire RPM range,...01092505- SKU:
- 01092505
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- RIDING STYLE:
- WATERCRAFT
- PISTON MATERIAL:
- ALUMINUM
- BORE - OVERSIZE:
- +0,50 MM
- BORE - OVERSIZE METRIC:
- +0.50 MM
- PRODUCT NAME:
- PISTON RING
- UNITS:
- SET
$24.97 -
WSM Piston Rings 010-925-06
WSM
$24.97Piston rings are critical wear items that directly impact compression, blow-by control, and oil consumption—neglecting them leads to power loss and engine damage. WSM Piston Rings 010-925-06 deliver precise tolerances and reliable sealing across the...01092506- SKU:
- 01092506
- Availability:
- Ships Same Business Day
- Weight:
- 0.03 LBS
- UNITS:
- SET
- BORE - OVERSIZE:
- +0,75 MM
- PISTON MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- PISTON RING
- RIDING STYLE:
- WATERCRAFT
- BORE - OVERSIZE METRIC:
- +0.75 MM
$24.97 -
WSM Piston Rings 010-929-04
WSM
$34.43Piston rings are critical wear components that directly impact compression, oil control, and engine longevity. WSM Piston Rings 010-929-04 deliver precise tolerances and reliable sealing across the full RPM range, whether you're running stock power or a...01092904- SKU:
- 01092904
- Availability:
- Ships Same Business Day
- Weight:
- 0.09 LBS
- PRODUCT NAME:
- PISTON RING
- RIDING STYLE:
- WATERCRAFT
- PISTON MATERIAL:
- ALUMINUM
- BORE - OVERSIZE:
- +0,25 MM
- BORE - OVERSIZE METRIC:
- +0.25 MM
- UNITS:
- SET
$34.43 -
WSM Piston Rings 010-930
WSM
$28.34Piston rings are critical to engine sealing and compression—worn or substandard rings lead to blowby, oil consumption, and power loss. WSM Piston Rings 010-930 deliver precise tolerances and reliable sealing across high-RPM and boosted applications...010930- SKU:
- 010930
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- PISTON MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- PISTON RING
- UNITS:
- SET
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- RIDING STYLE:
- WATERCRAFT
$28.34 -
MOOSE RACING Inner Clutch Cover Gasket 816757
MOOSE RACING
$33.38A leaking clutch cover gasket compromises engine sealing and can lead to oil loss and contamination—exactly what you don't need mid-race or mid-project. The MOOSE RACING Inner Clutch Cover Gasket delivers OEM-equivalent reliability at a fraction of the...09346169- SKU:
- 09346169
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- TYPE:
- CLUTCH COVER
- UNITS:
- EACH
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
$33.38 -
MOOSE RACING Motor Seals - YZ250 822304
MOOSE RACING
$33.45A complete engine seal failure can sideline your YZ250 indefinitely—and OEM replacement kits come with premium pricing that cuts into your race budget. MOOSE Racing Motor Seals deliver genuine OEM-quality fitment and durability at a fraction of the cost,...09350113- SKU:
- 09350113
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 LBS
- APPLICATION:
- ENGINE
- PRODUCT NAME:
- SEAL
- UNITS:
- SET
- TYPE:
- OIL
- RIDING STYLE:
- OFF-ROAD
$33.45 -
MOOSE RACING Exhaust Gasket Kit 823002
MOOSE RACING
$9.68A leaking exhaust system ruins performance and wastes horsepower before it ever leaves your engine. OEM gaskets deteriorate under heat cycles, causing exhaust leaks that compromise seal integrity and reduce efficiency. The MOOSE RACING Exhaust Gasket Kit...09345272- SKU:
- 09345272
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- EXHAUST
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$9.68 -
MOOSE RACING Exhaust Gasket Kit 823176
MOOSE RACING
$21.48A quality exhaust gasket kit is essential for maintaining a proper seal between exhaust manifold and header joints, preventing costly exhaust leaks that compromise performance and increase emissions. Worn or deteriorated gaskets allow unmetered air to...09345351- SKU:
- 09345351
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- EXHAUST
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
$21.48
