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
-
Wossner 12x15x14.5 mm Top End Bearing for KTM 50 SX 2007-2022 N1001
WOSSNER
$18.50Top-end bearing wear is one of the most common failure points in high-revving two-stroke engines, and a failing bearing will quickly cascade into catastrophic engine damage. The Wossner 12x15x14.5 mm bearing restores proper clearances and reduces...09240494- SKU:
- 09240494
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- INSIDE DIAMETER METRIC:
- 12 MM
- LENGTH METRIC:
- 14.5 MM
- PRODUCT NAME:
- BEARING
- OUTSIDE DIAMETER METRIC:
- 15 MM
- APPLICATION:
- CONNECTING ROD
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- EACH
$18.50 -
Wossner Top End Bearing 14x18x16.5mm for 2002-2022 Yamaha YZ85 N1006
WOSSNER
$18.50The Wossner N1006 top end bearing is a critical wear component in your YZ85's top end assembly—it directly impacts piston speed stability, combustion chamber seal, and overall engine longevity. A failing or worn bearing introduces unwanted play in the...09240447- SKU:
- 09240447
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PRODUCT NAME:
- BEARING
- LENGTH METRIC:
- 16.5 MM
- OUTSIDE DIAMETER METRIC:
- 18 MM
- TYPE:
- TOP END
- UNITS:
- EACH
- APPLICATION:
- CONNECTING ROD
- INSIDE DIAMETER METRIC:
- 14 MM
- RIDING STYLE:
- OFF-ROAD
$18.50 -
Wossner Top End Bearing for Kawasaki KX85 2001-2013 N1007
WOSSNER
$18.50The Wossner Top End Bearing is a critical wear item for KX85 two-stroke engines operating at high RPM. When the original bearing begins to show play or noise, replacement is essential to prevent catastrophic engine damage and maintain the crisp throttle...09240448- SKU:
- 09240448
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- LENGTH METRIC:
- 17.2 MM
- OUTSIDE DIAMETER METRIC:
- 18 MM
- TYPE:
- TOP END
- UNITS:
- EACH
- APPLICATION:
- CONNECTING ROD
- RIDING STYLE:
- OFF-ROAD
- INSIDE DIAMETER METRIC:
- 18 MM
- PRODUCT NAME:
- BEARING
$18.50Qty in Cart: 0Quantity:Price:$18.50Subtotal: -
Wossner Top End Bearing 15x19x19.5 mm for 2007-2014 KTM 125 SX N1010
WOSSNER
$18.50The top end bearing is critical to your KTM 125 SX's reliability—a worn or damaged bearing will compromise piston rod movement and accelerate wear across your entire top end. This Wossner bearing is engineered to OEM specifications with tight tolerances,...09240450- SKU:
- 09240450
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- OUTSIDE DIAMETER METRIC:
- 19 MM
- APPLICATION:
- CONNECTING ROD
- RIDING STYLE:
- OFF-ROAD
- INSIDE DIAMETER METRIC:
- 15 MM
- LENGTH METRIC:
- 19.5 MM
- RIDING STYLE:
- STREET
- TYPE:
- TOP END
- UNITS:
- EACH
- PRODUCT NAME:
- BEARING
$18.50 -
Wossner Top End Bearing 18 mm x 22 mm x 19.8 mm N1020
WOSSNER
$18.50A worn or inadequate top end bearing is a direct path to increased friction, premature wear, and catastrophic engine failure. The Wossner N1020 delivers precision-engineered reliability in a compact 18 x 22 x 19.8 mm package, ensuring your engine...09240456- SKU:
- 09240456
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- LENGTH METRIC:
- 19.8 MM
- OUTSIDE DIAMETER METRIC:
- 22 MM
- APPLICATION:
- CONNECTING ROD
- INSIDE DIAMETER METRIC:
- 18 MM
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- PRODUCT NAME:
- BEARING
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
$18.50 -
Wossner Top End Bearing 18x22x21.8mm Honda CR250R N1021
WOSSNER
$18.50Top-end bearing wear is one of the fastest paths to catastrophic engine failure—especially under the high RPMs and thermal stress of racing. The Wössner N1021 is a precision needle roller bearing designed to handle the extreme demands of a Honda CR250R,...09240457- SKU:
- 09240457
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- INSIDE DIAMETER METRIC:
- 18 MM
- PRODUCT NAME:
- BEARING
- UNITS:
- EACH
- APPLICATION:
- CONNECTING ROD
- OUTSIDE DIAMETER METRIC:
- 22 MM
- LENGTH METRIC:
- 21.8 MM
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
$18.50 -
Wossner Top End Bearing 18x23x21.8mm Suzuki RM250 1977-2008 N1022
WOSSNER
$18.50Top end bearings are critical wear items in two-stroke engines—they directly impact crankshaft stability, reduce parasitic friction losses, and extend engine longevity under high RPM loads. The Wossner N1022 is a precision replacement bearing engineered...09240458- SKU:
- 09240458
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- INSIDE DIAMETER METRIC:
- 18 MM
- TYPE:
- TOP END
- LENGTH METRIC:
- 21.8 MM
- OUTSIDE DIAMETER METRIC:
- 23 MM
- PRODUCT NAME:
- BEARING
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- CONNECTING ROD
- UNITS:
- EACH
$18.50 -
Wossner Top End Bearing for Kawasaki KX65 2000-2022 N1036
WOSSNER
$18.50The top end bearing is a critical wear item in high-revving two-stroke engines—it bears the brunt of crankshaft loads and demands precision engineering to prevent catastrophic failure. The Wossner N1036 is purpose-built for the KX65, delivering the exact...09240459- SKU:
- 09240459
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- OUTSIDE DIAMETER METRIC:
- 16 MM
- PRODUCT NAME:
- BEARING
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- EACH
- APPLICATION:
- CONNECTING ROD
- INSIDE DIAMETER METRIC:
- 12 MM
- LENGTH METRIC:
- 15.8 MM
$18.50 -
On Sale
Wiseco Top End Bearing 19x24x24.8 for Kawasaki KX500 1988-2004 B1036
WISECO
MSRP: $25.95Now: $20.00Was: $25.95If you're pushing your KX500 to its limits, top-end bearing wear is non-negotiable—this is where power transfers directly to performance. The Wiseco B1036 is engineered specifically for the demands of high-rpm four-stroke racing, delivering the precision...09240123- SKU:
- 09240123
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- MATERIAL:
- SILICONE
- OUTSIDE DIAMETER METRIC:
- 24 MM
- RIDING STYLE:
- OFF-ROAD
- MATERIAL:
- ALUMINUM
- UNITS:
- EACH
- INSIDE DIAMETER METRIC:
- 19 MM
- LENGTH METRIC:
- 24.8 MM
- PRODUCT NAME:
- BEARING
- APPLICATION:
- PISTON
MSRP: $25.95Now: $20.00Was: $25.95 -
VINTCO Main Bearing and Seal Kit - Honda KMB003
VINTCO
$34.95A proper crankshaft installation demands precision-matched bearings and seals—any compromise here directly impacts engine reliability and longevity. The VINTCO KMB003 Main Bearing and Seal Kit delivers OEM-quality Japanese-manufactured components that...09240651- SKU:
- 09240651
- Availability:
- Ships Same Business Day
- Weight:
- 0.91 LBS
$34.95Qty in Cart: 0Quantity:Price:$34.95Subtotal: -
VINTCO Main Bearing and Seal Kit - Suzuki KMB018
VINTCO
$59.95A precision crankshaft installation demands equally precise bearings and seals—cutting corners here compromises engine reliability and performance. The VINTCO Main Bearing and Seal Kit delivers OEM-grade Japanese manufacturing in a complete package,...09240670- SKU:
- 09240670
- Availability:
- Ships Same Business Day
- Weight:
- 1.21 LBS
$59.95 -
VINTCO Main Bearing and Seal Kit - Suzuki KMB019
VINTCO
$59.95A worn or damaged main bearing and seal kit compromises crankshaft stability and can lead to catastrophic engine failure. The VINTCO KMB019 is engineered to OEM specifications, ensuring proper journal fit and oil containment across your Suzuki's entire...09240671- SKU:
- 09240671
- Availability:
- Ships Same Business Day
- Weight:
- 1.16 LBS
$59.95Qty in Cart: 0Quantity:Price:$59.95Subtotal: -
MOOSE RACING Crank Bearing GAS EC 24-1118
MOOSE RACING
$89.95Crankshaft bearing failure is one of the quickest ways to end a race day—or destroy an engine. The MOOSE RACING Crank Bearing GAS EC 24-1118 delivers precision-engineered bearings with fluorocarbon lip seals specifically designed to minimize dry start...09240603- SKU:
- 09240603
- Availability:
- Ships Same Business Day
- Weight:
- 1.26 LBS
- PRODUCT NAME:
- BEARING
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- APPLICATION:
- CRANKSHAFT
- TYPE:
- BALL
- RIDING STYLE:
- STREET
$89.95 -
MOOSE RACING Crank Bearing - KTM 24-1099
MOOSE RACING
$39.95Worn crankshaft bearings are the silent killer of 2-stroke performance—they accelerate power loss, increase friction, and can lead to catastrophic engine failure if left unchecked. The MOOSE RACING Crank Bearing kit restores the tight tolerances your...09240221- SKU:
- 09240221
- Availability:
- Ships Same Business Day
- Weight:
- 0.26 LBS
- TYPE:
- BALL
- APPLICATION:
- CRANKSHAFT
- PRODUCT NAME:
- BEARING
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$39.95 -
MOOSE RACING Crank Bearings and Seals 24-1047
MOOSE RACING
$70.95Crank bearing wear is one of the most common failure points in 2-stroke engines, leading to loss of compression, increased friction, and eventual catastrophic seizure. The MOOSE RACING 24-1047 kit replaces worn bearings and seals with precision...09240007- SKU:
- 09240007
- Availability:
- Ships Same Business Day
- Weight:
- 1.69 LBS
- APPLICATION:
- CRANKSHAFT
- PRODUCT NAME:
- BEARING
- TYPE:
- BALL
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$70.95 -
MOOSE RACING Crank Bearing - Yamaha 24-1066
MOOSE RACING
$84.95A worn or failing crankshaft bearing will rob your 2-stroke of responsiveness and reliability when you need it most. MOOSE Racing's precision-engineered crank bearing kit restores original performance clearances and reduces dry-start friction with...09240214- SKU:
- 09240214
- Availability:
- Ships Same Business Day
- Weight:
- 1.65 LBS
- APPLICATION:
- CRANKSHAFT
- RIDING STYLE:
- STREET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- BEARING
- TYPE:
- BALL
$84.95Qty in Cart: 0Quantity:Price:$84.95Subtotal: -
MOOSE RACING Crank Bearing - KTM 24-1097
MOOSE RACING
$134.95A worn or failing crank bearing will sabotage your engine's reliability and performance, leading to catastrophic damage if ignored. MOOSE Racing's precision-engineered crank bearings restore your crankshaft to OEM specifications with tighter tolerances...09240219- SKU:
- 09240219
- Availability:
- Ships Same Business Day
- Weight:
- 1.81 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- RIDING STYLE:
- STREET
- APPLICATION:
- CRANKSHAFT
- PRODUCT NAME:
- BEARING
- TYPE:
- BALL
$134.95 -
MOOSE RACING Crank Bearing - KTM 24-1098
MOOSE RACING
$148.95Worn crank bearings are one of the leading causes of catastrophic 2-stroke engine failure, and replacing them is non-negotiable for maintaining reliability and power delivery. The MOOSE RACING Crank Bearing Kit eliminates play in your crankshaft,...09240220- SKU:
- 09240220
- Availability:
- Ships Same Business Day
- Weight:
- 1.26 LBS
- PRODUCT NAME:
- BEARING
- TYPE:
- BALL
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- APPLICATION:
- CRANKSHAFT
$148.95Qty in Cart: 0Quantity:Price:$148.95Subtotal: -
SHINDY Needle Bearing - 18 mm x 23 mm x 24 mm 10-101
SHINDY
$10.95Piston pin needle bearings are critical wear components that directly impact engine reliability and performance consistency. A worn or degraded bearing increases friction, reduces power transfer efficiency, and risks catastrophic engine failure. The...NB1452- SKU:
- NB1452
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- LENGTH:
- 24 MM
- LENGTH METRIC:
- 24 MM
- OUTSIDE DIAMETER METRIC:
- 23 MM
- APPLICATION:
- PISTON
- OUTSIDE DIAMETER:
- 23 MM
- RIDING STYLE:
- ATV
- TYPE:
- NEEDLE
- UNITS:
- EACH
- INSIDE DIAMETER:
- 18 MM
- INSIDE DIAMETER METRIC:
- 18 MM
- PRODUCT NAME:
- BEARING
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
$10.95 -
SHINDY Needle Bearing - 16 mm x 21 mm x 19.5 mm 10-251
SHINDY
$9.95Piston pin needle bearings are critical to engine reliability, directly affecting power transfer and reducing friction at one of the most stressed points in your engine. A worn or inadequate bearing leads to piston slap, increased wear rates, and...NB1463- SKU:
- NB1463
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- INSIDE DIAMETER METRIC:
- 16 MM
- LENGTH METRIC:
- 19.5 MM
- TYPE:
- NEEDLE
- INSIDE DIAMETER:
- 16 MM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- LENGTH:
- 19,5 MM
- OUTSIDE DIAMETER:
- 21 MM
- PRODUCT NAME:
- BEARING
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- PISTON
- OUTSIDE DIAMETER METRIC:
- 21 MM
- UNITS:
- EACH
$9.95
