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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PROX Crank Bearing and Seal Kit 23.CBS23083
PROX
$70.95A crankshaft bearing and seal failure can sideline your engine at the worst possible moment—leaving you stranded mid-season or mid-race. The PROX Crank Bearing and Seal Kit 23.CBS23083 delivers OEM-spec replacement bearings and seals that restore your...09240322- SKU:
- 09240322
- Availability:
- Ships Same Business Day
- Weight:
- 1.05 LBS
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- 2-STROKE
- TYPE:
- BALL
- PRODUCT NAME:
- BEARING AND SEAL KIT
- UNITS:
- KIT
- APPLICATION:
- CRANKSHAFT
$70.95 -
PROX Crank Bearing and Seal Kit 23.CBS23088
PROX
$70.95A compromised crank bearing or seal can quietly undermine engine reliability and performance, turning a strong build into a liability on the track or street. The PROX Crank Bearing and Seal Kit 23.CBS23088 ensures your crankshaft assembly maintains...09240324- SKU:
- 09240324
- Availability:
- Ships Same Business Day
- Weight:
- 1.50 LBS
- PRODUCT NAME:
- BEARING AND SEAL KIT
- TYPE:
- BALL
- STYLE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- APPLICATION:
- CRANKSHAFT
$70.95 -
PROX Crank Bearing and Seal Kit 23.CBS23099
PROX
$70.95A complete crankshaft bearing and seal kit is essential for any bottom-end rebuild—it ensures proper clearances, reduces friction, and extends engine life. This PROX kit eliminates guesswork by providing factory-spec components engineered to work...09240326- SKU:
- 09240326
- Availability:
- Ships Same Business Day
- Weight:
- 1.50 LBS
- PRODUCT NAME:
- BEARING AND SEAL KIT
- TYPE:
- BALL
- STYLE:
- 2-STROKE
- APPLICATION:
- CRANKSHAFT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$70.95Qty in Cart: 0Quantity:Price:$70.95Subtotal: -
PROX Crank Bearing and Seal Kit 23.CBS24098
PROX
$102.95A failed crank bearing or seal doesn't just compromise performance—it can catastrophically damage your entire bottom end. This PROX kit delivers all the precision-engineered bearings and seals you need to restore your crankshaft to OEM specifications,...09240329- SKU:
- 09240329
- Availability:
- Ships Same Business Day
- Weight:
- 1.62 LBS
- APPLICATION:
- CRANKSHAFT
- TYPE:
- BALL
- RIDING STYLE:
- ATV
- RIDING STYLE:
- STREET
- STYLE:
- 4-STROKE
- PRODUCT NAME:
- BEARING SET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$102.95 -
PROX Crank Bearing and Seal Kit 23.CBS31089
PROX
$49.95A crankshaft rebuild demands precision-matched components to maintain tolerances and prevent premature wear. This PROX crank bearing and seal kit delivers OEM-spec parts engineered to work seamlessly with both factory and Pro X crankshafts, ensuring...09240330- SKU:
- 09240330
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- APPLICATION:
- CRANKSHAFT
- TYPE:
- BALL
- PRODUCT NAME:
- BEARING AND SEAL KIT
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- 2-STROKE
- UNITS:
- KIT
$49.95Qty in Cart: 0Quantity:Price:$49.95Subtotal: -
PROX Crank Bearing and Seal Kit 23.CBS31099
PROX
$52.95A compromised crankshaft bearing or seal will leave you stranded—or worse, cost you a race. The PROX Crank Bearing and Seal Kit 23.CBS31099 delivers OEM-spec replacements that restore your crankshaft to factory performance standards, ensuring reliable...09240331- SKU:
- 09240331
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- APPLICATION:
- CRANKSHAFT
- PRODUCT NAME:
- BEARING AND SEAL KIT
- TYPE:
- BALL
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- 2-STROKE
- UNITS:
- KIT
$52.95 -
PROX Crank Bearing and Seal Kit 23.CBS32087
PROX
$45.95A worn or damaged crank bearing and seal kit will rob your engine of reliability and efficiency—compromising both performance and longevity. The PROX 23.CBS32087 delivers OEM-spec precision engineering, ensuring your crankshaft operates with minimal...09240332- SKU:
- 09240332
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- APPLICATION:
- CRANKSHAFT
- TYPE:
- BALL
- PRODUCT NAME:
- BEARING AND SEAL KIT
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- 2-STROKE
$45.95Qty in Cart: 0Quantity:Price:$45.95Subtotal: -
PROX Crank Bearing and Seal Kit 23.CBS32089
PROX
$70.95A failing crankshaft bearing or seal will compromise engine reliability and performance—and sideline you when you can't afford downtime. This complete PROX kit eliminates guesswork by including every bearing and seal your crank needs, manufactured to OEM...09240333- SKU:
- 09240333
- Availability:
- Ships Same Business Day
- Weight:
- 0.95 LBS
- APPLICATION:
- CRANKSHAFT
- PRODUCT NAME:
- BEARING AND SEAL KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- STYLE:
- 2-STROKE
- TYPE:
- BALL
$70.95 -
PROX Crank Bearing and Seal Kit 23.CBS32099
PROX
$70.95A failing crankshaft bearing or seal will quickly compromise engine reliability and performance—exact OEM-specification replacements ensure you maintain factory tolerances and durability standards. This comprehensive kit eliminates the need to source...09240334- SKU:
- 09240334
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
- APPLICATION:
- CRANKSHAFT
- STYLE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- BEARING AND SEAL KIT
- TYPE:
- BALL
$70.95 -
PROX Crank Bearing and Seal Kit 23.CBS33000
PROX
$80.95A failed crankshaft bearing or seal can sideline your engine at the worst possible moment—mid-race or mid-season. The PROX Crank Bearing and Seal Kit 23.CBS33000 gives you a complete, OEM-specification replacement solution that restores your crankshaft...09240335- SKU:
- 09240335
- Availability:
- Ships Same Business Day
- Weight:
- 1.50 LBS
- APPLICATION:
- CRANKSHAFT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- STYLE:
- 2-STROKE
- PRODUCT NAME:
- BEARING AND SEAL KIT
- TYPE:
- BALL
$80.95 -
PROX Crank Bearing and Seal Kit 23.CBS33003
PROX
$80.95A quality crank bearing and seal kit is essential for maintaining reliability in high-performance engines, particularly after teardowns or extended racing campaigns. This PROX kit eliminates the guesswork by supplying all necessary components...09240336- SKU:
- 09240336
- Availability:
- Ships Same Business Day
- Weight:
- 1.55 LBS
- UNITS:
- KIT
- STYLE:
- 2-STROKE
- APPLICATION:
- CRANKSHAFT
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- BEARING AND SEAL KIT
- TYPE:
- BALL
$80.95 -
PROX Crank Bearing and Seal Kit 23.CBS33007
PROX
$139.95A worn crank bearing and seal kit compromises both engine reliability and performance—exactly what you can't afford during competition or high-demand builds. The PROX 23.CBS33007 restores your crankshaft to OEM precision specifications, ensuring proper...09240337- SKU:
- 09240337
- Availability:
- Ships Same Business Day
- Weight:
- 0.92 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- APPLICATION:
- CRANKSHAFT
- TYPE:
- BALL
- STYLE:
- 4-STROKE
- PRODUCT NAME:
- BEARING AND SEAL KIT
$139.95 -
PROX Crank Bearing and Seal Kit 23.CBS33010
PROX
$159.95A complete crank bearing and seal kit is essential when rebuilding or servicing your crankshaft—neglecting worn bearings and seals is a direct path to catastrophic engine failure. The PROX 23.CBS33010 provides everything you need in one package,...09240338- SKU:
- 09240338
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- BEARING AND SEAL KIT
- STYLE:
- 4-STROKE
- APPLICATION:
- CRANKSHAFT
- TYPE:
- BALL
$159.95 -
PROX Crank Bearing and Seal Kit 23.CBS33096
PROX
$85.95A crank bearing and seal kit is essential maintenance for any serious engine build—worn bearings compromise crankshaft stability, reduce engine longevity, and kill performance gains from your other upgrades. The PROX 23.CBS33096 delivers...09240344- SKU:
- 09240344
- Availability:
- Ships Same Business Day
- Weight:
- 1.50 LBS
- APPLICATION:
- CRANKSHAFT
- PRODUCT NAME:
- BEARING AND SEAL KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- STYLE:
- 2-STROKE
- TYPE:
- BALL
$85.95Qty in Cart: 0Quantity:Price:$85.95Subtotal: -
PROX Crank Bearing and Seal Kit 23.CBS34005
PROX
$109.95A complete crank bearing and seal kit is essential for any serious engine rebuild—whether you're restoring a factory powerplant or upgrading to a Pro X crankshaft. This OEM-specification kit ensures proper clearances, oil circulation, and longevity under...09240346- SKU:
- 09240346
- Availability:
- Ships Same Business Day
- Weight:
- 1.65 LBS
- APPLICATION:
- CRANKSHAFT
- TYPE:
- BALL
- STYLE:
- 4-STROKE
- PRODUCT NAME:
- BEARING SET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$109.95 -
PROX Crank Bearing and Seal Kit 23.CBS34008
PROX
$156.95A crankshaft rebuild demands precision—and a single worn bearing or seal will compromise your entire bottom end. The PROX Crank Bearing and Seal Kit 23.CBS34008 delivers OEM-exact replacements for every critical component, eliminating guesswork and...09240347- SKU:
- 09240347
- Availability:
- Ships Same Business Day
- Weight:
- 1.73 LBS
- PRODUCT NAME:
- BEARING AND SEAL KIT
- STYLE:
- 4-STROKE
- APPLICATION:
- CRANKSHAFT
- TYPE:
- BALL
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$156.95 -
PROX Crank Bearing and Seal Kit 23.CBS42085
PROX
$65.95A quality crank bearing and seal kit is essential for reliable engine performance and longevity. Worn or failing bearings increase friction, reduce power transfer, and risk catastrophic engine damage. The PROX 23.CBS42085 delivers OEM-specification...09240351- SKU:
- 09240351
- Availability:
- Ships Same Business Day
- Weight:
- 1.05 LBS
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- 2-STROKE
- UNITS:
- KIT
- PRODUCT NAME:
- BEARING AND SEAL KIT
- APPLICATION:
- CRANKSHAFT
- TYPE:
- BALL
$65.95 -
PROX Crank Bearing and Seal Kit 23.CBS42088
PROX
$70.95A properly sealed and supported crankshaft is foundational to engine reliability and consistent power delivery. This Pro X bearing and seal kit eliminates the guesswork by providing all necessary components manufactured to exact OEM specifications,...09240352- SKU:
- 09240352
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- 2-STROKE
- UNITS:
- KIT
- TYPE:
- BALL
- PRODUCT NAME:
- BEARING AND SEAL KIT
- APPLICATION:
- CRANKSHAFT
$70.95 -
PROX Crank Bearing and Seal Kit 23.CBS42092
PROX
$70.95A crank bearing and seal kit is essential maintenance for any serious engine build—worn bearings compromise crankshaft stability and can cascade into catastrophic failure. This PROX kit delivers OEM-specification components that restore proper bearing...09240353- SKU:
- 09240353
- Availability:
- Ships Same Business Day
- Weight:
- 1.15 LBS
- UNITS:
- KIT
- RIDING STYLE:
- STREET
- 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.CBS43003
PROX
$135.95A crankshaft rebuild demands precision—bearing failure or seal degradation can cascade into catastrophic engine damage. This Pro X crank bearing and seal kit eliminates guesswork by supplying every component you need for a complete, OEM-spec renewal in...09240355- SKU:
- 09240355
- Availability:
- Ships Same Business Day
- Weight:
- 1.69 LBS
- APPLICATION:
- CRANKSHAFT
- STYLE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- BEARING AND SEAL KIT
- TYPE:
- BALL
$135.95Qty in Cart: 0Quantity:Price:$135.95Subtotal:
