{"product_id":"briggs-stratton-animal-lo206-world-formula-crankshaft-2-2-stroke-oem-replacement","title":"Briggs \u0026 Stratton Animal \/ LO206 \/ World Formula Crankshaft - 2.2\" Stroke - OEM Replacement","description":"\u003cp\u003eWhen integrating top-tier racing parts into your powertrain, the Briggs \u0026amp; Stratton 557137 Crankshaft delivers the ultimate foundation for transferring raw combustion into race-winning momentum. Designed specifically for the Animal, LO206, and World Formula platforms, this drop-in replacement (superseding 555622) ensures your bottom end can withstand the brutal harmonic loads of competitive sprint racing. Whether you are reviving a used lo206 kart or building a fresh powerplant from the ground up, a true-running crankshaft is non-negotiable for maximizing briggs and stratton lo206 horsepower.\u003c\/p\u003e\u003ch2\u003eOutperforming the Competition: From Rotax Engines to Briggs\u003c\/h2\u003e\u003cp\u003eKart builders know that finding the right motor engine for sale is only half the battle; the real advantage is won in the assembly room. While 2-cycle platforms like rotax engines rely on high RPMs, the Briggs 4-cycle family demands massive torque delivery and sustained durability. This OEM forged crankshaft is engineered with an induction-hardened crankpin to resist wear under continuous heavy loads, ensuring tight tolerances are maintained race after race. If you are prepping a briggs lo206 for sale, installing this factory-spec crank guarantees the next driver experiences peak dyno-proven reliability without the risk of catastrophic bottom-end failure.\u003c\/p\u003e\u003ch2\u003eTechnical Specifications \u0026amp; Durability Focus\u003c\/h2\u003e\u003cp\u003eEvery component in your driveline, from the clutch down to your wheel accessories, relies on the smooth rotational mass of a perfectly balanced crankshaft. By reducing harmonic vibrations, this shaft prevents fatigue in the engine block and extends the service life of critical bearings.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInduction-Hardened Journals:\u003c\/strong\u003e Delivers exceptional wear resistance, sustaining micro-tolerances under extreme heat and friction.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCounterweighted Balance:\u003c\/strong\u003e Drastically reduces harmonic vibrations, allowing sustained peak RPMs without structural fatigue.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM 2.2\" Compatible Stroke:\u003c\/strong\u003e Matches exact factory specifications for Animal, LO206, and World Formula blocks for seamless, drop-in reliability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptimized Oil Passages:\u003c\/strong\u003e Maximizes lubrication flow to critical bearings, extending service intervals even in dusty, high-debris track conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eForged Steel Construction:\u003c\/strong\u003e Outlasts lesser aftermarket alternatives, cutting seasonal downtime and expensive rebuild costs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClass-Legal Compliance:\u003c\/strong\u003e Meets all technical regulations for stock Briggs racing classes, keeping your setup strictly legal.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDirect Drivetrain Transfer:\u003c\/strong\u003e Minimizes parasitic power loss, translating piston energy directly into aggressive corner-exit acceleration.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eStop compromising your race weekends with fatigued engine internals. This crankshaft provides the bulletproof reliability required to push your kart to the absolute limit, lap after grueling lap.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is this crankshaft compatible with my existing LO206 or Animal engine?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Yes, this is a direct OEM replacement for the Animal, LO206, and World Formula platforms. It features the standard 2.2\" stroke and is designed as a drop-in component to replace older versions, such as the superseded 555622.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Do I need to perform any special balancing when installing this crankshaft?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e This crankshaft comes factory-balanced to reduce harmonic vibrations. However, when performing a full bottom-end rebuild, it is always recommended to check your bearing clearances and ensure the crank rotates freely in the block before final assembly.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can I use this crankshaft in a class-legal racing series?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Yes, this is an OEM Briggs \u0026amp; Stratton part that meets all technical regulations for stock Briggs racing classes, ensuring your engine remains class-legal.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What maintenance tips do you recommend for the crankshaft?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e To maximize the life of your crankshaft, ensure you are using high-quality oil and adhering to strict service intervals. The optimized oil passages in this unit are designed to improve lubrication, but keeping your oil clean is critical to preventing wear on the induction-hardened journals.\u003c\/p\u003e\n\n\u003ch3\u003eRelated Products From Vendor\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/557117-connecting-rod-557117\"\u003eHigh-Performance Connecting Rod for World Formula Kart Engines\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/555706-crankcase-cover-555706\"\u003eBriggs Animal LO206 Crankcase Cover for Reliable Engine Protection\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/555660-piston-assy-std-555660\"\u003eStandard Piston Assembly for Briggs Animal Kart Engines\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/555705-cylinder-assembly-superceded-by-84011134-555705\"\u003eBriggs \u0026amp; Stratton Animal\/LO206 Cylinder Assembly - Precision Honed Bore - WKA\/IKF Legal\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/555635-cylinder-head-555635\"\u003eBriggs \u0026amp; Stratton LO206 Animal Cylinder Head - OEM Spec - LO206 Legal\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SwiftKarting","offers":[{"title":"Default Title","offer_id":48158066999555,"sku":"557137","price":134.45,"currency_code":"USD","in_stock":true}],"url":"https:\/\/phishstonesproducts.myshopify.com\/products\/briggs-stratton-animal-lo206-world-formula-crankshaft-2-2-stroke-oem-replacement","provider":"PhishStones Products","version":"1.0","type":"link"}