Dirt Bike Engine Bearings
Dirt Bike Engine Bearings & Crank Bearing Kits for Yamaha, Honda & Beta at JJ Motorsports
Rebuild your dirt bike's bottom end with premium crankshaft bearings, needle bearings, and complete seal kits from JJ Motorsports — precision-engineered for perfect fit, reduced friction, and extreme durability in motocross, enduro, and trail riding. Our selection includes high-quality main bearings, crank bearing/seal kits, and needle bearings designed to handle high RPM, high heat, and heavy loads while restoring smooth, quiet operation. Compatible with top models like Yamaha YZ/WR, Honda CRF/CR, Beta RR, and more, these components from trusted brands deliver OEM or better performance with upgraded materials that outlast stock bearings in dusty, abusive conditions. Whether you're splitting the cases for a full rebuild or just replacing worn mains, these kits give you everything — bearings, seals, and gaskets — for factory-fresh feel and championship-level reliability.
At JJ Motorsports, we stock the best dirt bike engine bearings and crank kits from Moose Racing, Shindy, and Vintco with fast shipping and expert support. Free shipping over $99!
Top Dirt Bike Engine Bearings & Kits
- Shindy Needle Bearing 16 mm x 21 mm x 23 mm Yamaha 10-301 – High-quality needle bearing for Yamaha models; exact OEM spec for shock linkage and swingarm applications.
- Moose Offroad Crank Bearing & Seal Kit Beta 24-1128 – Complete crank bearing and seal kit for Beta RR models; includes both sides for full bottom-end refresh.
- Vintco Main Bearing and Seal Kit Honda KMB034 – Premium main bearing and crank seal kit for vintage Honda models; perfect for classic CR and XR restoration with modern durability.
Browse our in-stock inventory below with same-day shipping and expert support. Free shipping over $99! Questions? Contact us for fitment advice!
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
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HOT RODS Crank Bearings K010
HOT RODS
$79.95A crankshaft is only as reliable as its bearings. The HOT RODS K010 main bearing and seal kit ensures precise tolerances and maximum load capacity during high-RPM operation, preventing premature wear and catastrophic engine failure. Whether you're...09240032- SKU:
- 09240032
- Availability:
- Ships Same Business Day
- Weight:
- 0.89 LBS
- TYPE:
- BALL
- APPLICATION:
- MAIN CRANKSHAFT
- PRODUCT NAME:
- BEARING
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$79.95Qty in Cart: 0Quantity:Price:$79.95Subtotal: -
HOT RODS Crank Bearings K085
HOT RODS
$212.95A crankshaft is only as reliable as its bearings—and the HOT RODS K085 Crank Bearing Kit delivers the precision fit and durability required for high-RPM performance. These main bearing and seal kits are engineered to work seamlessly with HOT RODS...09240373- SKU:
- 09240373
- Availability:
- Ships Same Business Day
- Weight:
- 0.95 LBS
- APPLICATION:
- MAIN CRANKSHAFT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- BEARING
- TYPE:
- BALL
$212.95Qty in Cart: 0Quantity:Price:$212.95Subtotal: -
Wossner Top End Bearing for 1986-2006 Kawasaki KDX200 N1016
WOSSNER
$18.50The top-end bearing in your KDX200 endures constant high-speed stress, and a worn bearing compromises power delivery and can lead to catastrophic engine failure. This Wossner replacement restores factory precision fit and eliminates play in the...09240453- SKU:
- 09240453
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- APPLICATION:
- CONNECTING ROD
- OUTSIDE DIAMETER METRIC:
- 21 MM
- LENGTH METRIC:
- 19.5 MM
- TYPE:
- TOP END
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- INSIDE DIAMETER METRIC:
- 16 MM
- PRODUCT NAME:
- BEARING
- RIDING STYLE:
- STREET
$18.50 -
Wiseco Top End Bearing for Kawasaki KDX175 1980-1981 B1016
WISECO
$25.95The Wiseco B1016 top end bearing is engineered to handle sustained high-RPM performance on your KDX175, delivering the reliability you need when every tenth of a second counts. Built from high-silicon aluminum with case-hardened construction, this...B1016- SKU:
- B1016
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- APPLICATION:
- PISTON
- MATERIAL:
- ALUMINUM
- UNITS:
- EACH
- OUTSIDE DIAMETER METRIC:
- 20 MM
- PRODUCT NAME:
- BEARING
- RIDING STYLE:
- SNOW
- INSIDE DIAMETER METRIC:
- 16 MM
- LENGTH METRIC:
- 19.5 MM
- MATERIAL:
- SILICONE
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
$25.95 -
Wiseco Top End Bearing for Kawasaki KX250 1978-2007 B1022
WISECO
$25.95The Wiseco B1022 top end bearing is engineered to withstand the extreme RPM demands of high-performance KX250 engines, delivering the reliability needed when you're pushing your bike to its limits. A failed top end bearing means catastrophic engine...B1022X- SKU:
- B1022X
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- LENGTH METRIC:
- 23.5 MM
- MATERIAL:
- ALUMINUM
- OUTSIDE DIAMETER METRIC:
- 22 MM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- TYPE:
- TOP END
- APPLICATION:
- PISTON
- INSIDE DIAMETER METRIC:
- 18 MM
- MATERIAL:
- SILICONE
- PRODUCT NAME:
- BEARING
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- RIDING STYLE:
- WATERCRAFT
$25.95 -
PROX Crank Bearing and Seal Kit 23.CBS11085
PROX
$59.95A worn or compromised crankshaft bearing and seal assembly will kill your engine's reliability and performance faster than almost any other failure point. This PROX kit delivers OEM-spec replacements that restore your crank to factory tolerances,...09240294- SKU:
- 09240294
- Availability:
- Ships Same Business Day
- Weight:
- 0.92 LBS
- PRODUCT NAME:
- BEARING AND SEAL KIT
- STYLE:
- 2-STROKE
- TYPE:
- BALL
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- APPLICATION:
- CRANKSHAFT
$59.95 -
PROX Crank Bearing and Seal Kit 23.CBS12086
PROX
$57.95A failed crank bearing or seal will leave you stranded—and replacement with inferior components compounds the problem. This PROX kit delivers OEM-spec precision engineering, ensuring your crankshaft operates with the durability and reliability you need...09240297- SKU:
- 09240297
- Availability:
- Ships Same Business Day
- Weight:
- 0.95 LBS
- APPLICATION:
- CRANKSHAFT
- TYPE:
- BALL
- PRODUCT NAME:
- BEARING AND SEAL KIT
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- 2-STROKE
- UNITS:
- KIT
$57.95 -
PROX Crank Bearing and Seal Kit 23.CBS13004
PROX
$109.95A crankshaft rebuild demands precision bearings and seals that meet OEM tolerances—any compromise here directly impacts engine reliability and performance. The PROX 23.CBS13004 kit eliminates the guesswork by delivering factory-spec components in a...09240298- SKU:
- 09240298
- Availability:
- Ships Same Business Day
- Weight:
- 1.10 LBS
- PRODUCT NAME:
- BEARING AND SEAL KIT
- STYLE:
- 4-STROKE
- APPLICATION:
- CRANKSHAFT
- TYPE:
- BALL
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$109.95Qty in Cart: 0Quantity:Price:$109.95Subtotal: -
PROX Crank Bearing and Seal Kit 23.CBS13084
PROX
$70.95A complete crank bearing and seal kit is non-negotiable when you're rebuilding or servicing your crankshaft—skimping on these components invites catastrophic failure under load. The PROX 23.CBS13084 delivers OEM-specification precision across all bearing...09240300- SKU:
- 09240300
- Availability:
- Ships Same Business Day
- Weight:
- 1.50 LBS
- APPLICATION:
- CRANKSHAFT
- PRODUCT NAME:
- BEARING AND SEAL KIT
- TYPE:
- BALL
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- 2-STROKE
- UNITS:
- KIT
$70.95 -
PROX Crank Bearing and Seal Kit 23.CBS14002
PROX
$105.95A complete crank bearing and seal kit is essential for any bottom-end rebuild—whether you're restoring an engine to factory specifications or upgrading to maximize reliability under high RPM loads. This PROX kit eliminates the guesswork by providing...09240304- SKU:
- 09240304
- Availability:
- Ships Same Business Day
- Weight:
- 1.40 LBS
- APPLICATION:
- CRANKSHAFT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- BEARING AND SEAL KIT
- STYLE:
- 4-STROKE
- TYPE:
- BALL
$105.95Qty in Cart: 0Quantity:Price:$105.95Subtotal: -
PROX Crank Bearing and Seal Kit 23.CBS14096
PROX
$85.95A crankshaft is only as reliable as its bearings and seals—neglect either, and you're risking catastrophic engine failure. The PROX Crank Bearing and Seal Kit 23.CBS14096 gives you a complete, OEM-spec replacement solution that restores your crankshaft...09240306- SKU:
- 09240306
- Availability:
- Ships Same Business Day
- Weight:
- 1.75 LBS
- APPLICATION:
- CRANKSHAFT
- PRODUCT NAME:
- BEARING SET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- STYLE:
- 4-STROKE
- TYPE:
- BALL
$85.95 -
PROX Crank Bearing and Seal Kit 23.CBS21081
PROX
$38.95A properly sealed and supported crankshaft is foundational to reliable engine performance and longevity. This PROX Crank Bearing and Seal Kit delivers OEM-specification components, eliminating the guesswork and risk of mixing incompatible parts during a...09240308- SKU:
- 09240308
- Availability:
- Ships Same Business Day
- Weight:
- 0.42 LBS
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- 2-STROKE
- UNITS:
- KIT
- APPLICATION:
- CRANKSHAFT
- TYPE:
- BALL
- PRODUCT NAME:
- BEARING AND SEAL KIT
$38.95 -
PROX Crank Bearing and Seal Kit 23.CBS21082
PROX
$33.95A complete crank bearing and seal kit is essential for any bottom-end rebuild—it ensures proper clearances, reduces friction, and extends crankshaft life. Whether you're restoring an engine to OEM spec or upgrading with a Pro X crank, this kit gives you...09240309- SKU:
- 09240309
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- 2-STROKE
- UNITS:
- KIT
- PRODUCT NAME:
- BEARING AND SEAL KIT
- APPLICATION:
- CRANKSHAFT
- TYPE:
- BALL
$33.95Qty in Cart: 0Quantity:Price:$33.95Subtotal: -
PROX Crank Bearing and Seal Kit 23.CBS21083
PROX
$59.95A crankshaft rebuild demands precision—substandard bearings and seals invite catastrophic failure and costly downtime. This PROX kit delivers OEM-exact specifications for reliable durability, whether you're running a stock bottom end or pairing it with a...09240310- SKU:
- 09240310
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
- APPLICATION:
- CRANKSHAFT
- STYLE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- BEARING AND SEAL KIT
- TYPE:
- BALL
$59.95 -
PROX Crank Bearing and Seal Kit 23.CBS21093
PROX
$36.95A compromised crankshaft bearing or seal can cascade into catastrophic engine failure—and downtime you can't afford. This PROX kit delivers OEM-spec replacements for both bearings and seals, ensuring your crank runs true and your engine stays sealed...09240311- SKU:
- 09240311
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- APPLICATION:
- CRANKSHAFT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- STYLE:
- 2-STROKE
- PRODUCT NAME:
- BEARING AND SEAL KIT
- TYPE:
- BALL
$36.95 -
PROX Crank Bearing and Seal Kit 23.CBS22079
PROX
$39.95A crankshaft rebuild demands precision—any wear in the bearing surfaces or seal integrity compromises engine reliability and performance. The PROX Crank Bearing and Seal Kit 23.CBS22079 delivers OEM-specification components that restore your crankshaft...09240314- SKU:
- 09240314
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- 2-STROKE
- UNITS:
- KIT
- PRODUCT NAME:
- BEARING AND SEAL KIT
- APPLICATION:
- CRANKSHAFT
- TYPE:
- BALL
$39.95 -
PROX Crank Bearing and Seal Kit 23.CBS22080
PROX
$38.95A failed crank bearing or seal will sideline your engine faster than any mechanical failure—this PROX kit gives you everything needed for a complete, reliable rebuild without sourcing multiple components separately. Whether you're refreshing an OEM...09240315- SKU:
- 09240315
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- 2-STROKE
- UNITS:
- KIT
- APPLICATION:
- CRANKSHAFT
- TYPE:
- BALL
- PRODUCT NAME:
- BEARING AND SEAL KIT
$38.95 -
PROX Crank Bearing and Seal Kit 23.CBS22086
PROX
$70.95A worn crank bearing and seal kit compromises engine reliability and performance—exactly what you can't afford during a rebuild or overhaul. This PROX kit delivers OEM-specification components engineered to restore your crankshaft to factory tolerances,...09240316- SKU:
- 09240316
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
- UNITS:
- KIT
- STYLE:
- 2-STROKE
- APPLICATION:
- CRANKSHAFT
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- BEARING AND SEAL KIT
- TYPE:
- BALL
$70.95 -
PROX Crank Bearing and Seal Kit 23.CBS22098
PROX
$70.95A quality crank bearing and seal kit is non-negotiable for engine reliability and longevity—especially when you're pushing your machine to its limits. The PROX 23.CBS22098 delivers OEM-spec components that restore your crankshaft assembly to factory...09240318- SKU:
- 09240318
- Availability:
- Ships Same Business Day
- Weight:
- 0.95 LBS
- PRODUCT NAME:
- BEARING AND SEAL KIT
- STYLE:
- 2-STROKE
- TYPE:
- BALL
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- APPLICATION:
- CRANKSHAFT
$70.95 -
PROX Crank Bearing and Seal Kit 23.CBS23001
PROX
$70.95A worn crankshaft bearing or seal failure will sideline your engine and derail your season. This PROX kit delivers all the bearings and seals you need to restore your crank to OEM specifications without guesswork or compatibility issues. Whether you're...09240320- SKU:
- 09240320
- Availability:
- Ships Same Business Day
- Weight:
- 1.55 LBS
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- 2-STROKE
- UNITS:
- KIT
- APPLICATION:
- CRANKSHAFT
- TYPE:
- BALL
- PRODUCT NAME:
- BEARING AND SEAL KIT
$70.95
