Precision Animal and World Formula Crankshaft Replacement

The heart of any high-performance engine beats through its crankshaft—enter the Animal / W.F. Crankshaft (SKU 557137), replacing 555622 to power Briggs karts with unmatched precision.

Explore its standout features:

• Induction-Hardened Journals: Provide exceptional wear resistance, sustaining tight tolerances under continuous high loads.
• Counterweighted Balance: Reduces harmonic vibrations, allowing sustained RPMs for faster laps without fatigue.
• Compatible Stroke: Matches factory specs for Animal, LO206, and World Formula, ensuring drop-in reliability.
• Oil Passage Design: Optimizes lubrication to critical bearings, extending service intervals in dusty track conditions.

Why does this matter on race day? A true-running crankshaft translates piston energy directly to the drivetrain, minimizing power loss and maximizing acceleration. Kart builders rely on it for fresh assemblies, achieving dyno-proven gains in torque and horsepower. It handles the brutal demands of sprint races, where every ounce of balance counts toward outpacing rivals.

In practice, it supports advanced timing adjustments, unlocking hidden potential in modified setups while staying legal for stock classes. For longevity, its robust forging outlasts lesser alternatives, cutting downtime and repair costs over a season.

Whether restoring a veteran chassis or prepping a new build, this crankshaft delivers the foundation for championship-caliber performance. Feel the difference in refined vibration and responsive power delivery—it's the upgrade that turns good engines into great ones.