Main Bearing Kits

Restore engine precision. At RPM Moto we understand that your engine’s main bearings are more than just parts, they’re the foundation of crankshaft alignment, durability and smooth performance. Whether you're rebuilding a commuter, upgrading a sport machine, or restoring a performance bike, our range of main bearing kits ensures you get the exact fit, quality and longevity you need.

Why Choose RPM Moto Main Bearing Kits

• Critical engine foundation: The main bearings support the crankshaft within the engine block, allowing it to rotate smoothly while maintaining alignment and load control. 

• Complete rebuild solution: Our kits include bearings, seals and necessary hardware (where applicable) to ensure that when you rebuild or repair, you’re doing it right while avoiding piecemeal fixes that leave weak links behind.

• High-grade components for motorcycle performance: We source from trusted manufacturers who build to high tolerance and durability standards because bearing failure can lead to major engine damage.

• Fits for your make, model & riding demands: Whether you’re on a commuter, adventure bike, sport or off-road machine, we carry kits matched to a wide range of motorcycles so you can ensure correct fitment and performance.

• Australia-wide dispatch & rider support: Shop online with RPM Moto and get delivery across Australia. Our team can assist you with selecting the right kit, checking compatibility and making sure you’ve got what you need for the job.

• Select international shipping available: RPM Moto proudly offers limited worldwide delivery on select parts and kits so riders beyond Australia can access genuine, high-quality motorcycle components with confidence.

What You’ll Find in Our Main Bearing Kit Range

• Standard main bearing kits: Direct replacement bearing sets for common models, ideal when simply refreshing worn or fatigued bearings.

• Performance or upgrade kits: For riders pushing higher RPMs, tuning engines, or building high-performance machines, we supply kits with higher tolerance bearings, improved materials and longer life.

• Model-specific & application-specific options: Tailored kits for particular engine types, model years or special builds, ensuring fitment and reliability.

• Budget or entry-level rebuild sets: Kits that restore proper function without premium cost for cost-sensitive rebuilds or less aggressive use cases.

• Accessory and bearing hardware sets: In some cases kits include seals, spacers, hardware and instructions for full service.

When It’s Time to Upgrade or Replace Your Main Bearing Kit

• Your engine shows signs of bearing wear: unusual noises, excessive crankshaft movement, low oil pressure or overheating.

• You're performing a full engine rebuild or overhaul and want to ensure bottom-end reliability from the start.

• Your bike is tuned for higher output, higher RPMs or more demanding riding and needs stronger bearing support.

• Age, hours, or heavy use have accumulated - bearings wear with time and load, so replacing them as part of major servicing is a smart preventative move.

• You want to reduce vibration, improve smoothness and extend engine life. Better bearings help by reducing friction and improving alignment.