Dirt Bike Transmission Bearing Kits – Smooth Gear Selection, Reliable Power Delivery
Restore precise, reliable gear engagement with our transmission bearing kits — a complete solution for replacing the worn main shaft and countershaft bearings that support your gearbox under constant lo... show more
Dirt Bike Transmission Bearing Kits – Smooth Gear Selection, Reliable Power Delivery
Restore precise, reliable gear engagement with our transmission bearing kits — a complete solution for replacing the worn main shaft and countershaft bearings that support your gearbox under constant load. Worn transmission bearings introduce play and noise that affect shifting quality and, left unchecked, can lead to serious gearbox damage.
Why Riders Choose Our Transmission Bearing Kits
Complete Kit Coverage – Includes main shaft and countershaft bearings matched together for a full transmission bearing service
Premium Bearing Brands – Sourced from trusted manufacturers for smooth rotation, correct load capacity, and long service life
OEM-Spec Tolerances – Machined to factory clearance specifications for correct shaft support and gear alignment
Reduces Gearbox Play – Fresh, tight-tolerance bearings eliminate the play that causes gear rattle and inconsistent shifting
Wide Model Range – Available for Honda CRF, Yamaha YZ/YZF, KTM SX/SX-F/EXC, Kawasaki KX/KX-F, and Suzuki RM/RM-Z
Why Transmission Bearings Wear Out
Main shaft and countershaft bearings support the full rotating load of every gear change and power pulse transmitted through the gearbox, and over time this constant load wears the races and rollers, introducing play between the shafts and cases. Once that happens, riders typically notice gear rattle, harder shifting, or inconsistent engagement, and if left unaddressed, worn bearings can allow shaft misalignment that accelerates gear and dog wear throughout the whole transmission.
Perfect For
- Bikes showing gearbox rattle, noise, or notchy shifting
- Full transmission and gearbox rebuilds
- High-hours engines due for preventative bearing servicing
- Post-crash or post-failure gearbox repairs
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