Dirt Bike Crankshafts – The Foundation of Reliable Engine Power
Rebuild your engine on a solid foundation with our dirt bike crankshafts — precision-engineered assemblies that convert piston movement into the rotational power that drives everything from your clutch to your rear wheel. Whether you're replacing a bent crank after a failure or rebuilding a high-hours engine, a true, correctly balanced crankshaft is essential for smooth, reliable running.
Why Riders Choose Our Crankshafts
Precision Balanced – Factory-matched balance factor ensures smooth operation and reduced vibration across the rev range
True Running Tolerance – Machined and checked for accurate runout, preventing the vibration and bearing wear caused by a bent crank
Hardened Crank Pin – Induction-hardened crank pin surface resists wear at the highest-load point in the bottom end
Complete Assembly Options – Available with con rod, big end bearing, and main bearings pre-fitted for a straightforward drop-in rebuild
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 Crankshaft Condition Is Non-Negotiable
The crankshaft sits at the very centre of your engine's rotating assembly, and any imbalance, bend, or excess play here radiates outward into every other component — bearings wear faster, vibration increases, and in severe cases a failing crank can cause catastrophic engine damage. Unlike many top-end parts, a crankshaft issue can't be patched around; getting a true, correctly balanced replacement is essential to a reliable bottom-end rebuild.
Perfect For
- Recovering from a bent crank after over-revving or engine failure
- Full bottom-end rebuilds on high-hours engines
- Bikes showing excessive vibration or bottom-end knock
- Post-crash engine assessments requiring crank replacement
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