{"product_id":"performance-manufacturing-aph125b-1-1-4-sprocket-hub-black-billet-all-classes","title":"Performance Manufacturing APH125B 1 1\/4\" Sprocket Hub - Black Billet - All Classes","description":"\u003cp\u003eWhen sourcing elite go kart parts for your driveline, the Performance Manufacturing APH125B 1 1\/4\" Sprocket Hub delivers the exact tolerances required to transfer maximum horsepower from your go kart engine directly to the track. In competitive sprint and endurance racing, the driveline is the most critical path for power delivery. Any inefficiency here costs you tenths of a second per lap. This updated billet hub eliminates those inefficiencies, providing a rock-solid foundation for your gearing setup.\u003c\/p\u003e\u003ch2\u003ePrecision Machining for Your Go Kart Engine\u003c\/h2\u003e\u003cp\u003eThe APH125B sprocket hub is engineered from high-grade billet aluminum, providing a rigid mounting foundation that prevents flex under heavy acceleration. A flexing sprocket carrier leads to chain binding, parasitic drag, and lost momentum. By maintaining absolute concentricity, this hub ensures that every ounce of torque generated by your motor engine translates into forward velocity. The refined 2019 design features updated machining tolerances, guaranteeing a slip-free fit on standard 1 1\/4-inch axles.\u003c\/p\u003e\u003ch2\u003eOptimizing the Parts of Wheel and Driveline Assembly\u003c\/h2\u003e\u003cp\u003eDriveline alignment is critical in competitive karting. The APH125B acts as the vital link between your power plant and the rear axle, complementing the other parts of wheel assemblies to maintain rotational balance. Its black anodized finish isn't just for aesthetics; it provides a hardened surface that resists galling and accelerates heat dissipation during long, grueling heat races. When you are dialing in your gear ratios, the precise bolt-circle diameter allows for rapid sprocket changes in the pits, giving your team a distinct mechanical advantage.\u003c\/p\u003e\u003ch2\u003eBuilt for the Demands of Modern Motor Engine Output\u003c\/h2\u003e\u003cp\u003eAs modern karting powerplants produce more aggressive torque curves, your driveline hardware must evolve to handle the stress. The Performance Manufacturing 1 1\/4\" Sprocket Hub is built specifically to withstand the violent engagement of high-performance clutches and the sustained RPMs of elite racing. Whether you are running a high-revving two-stroke or a heavily modified four-stroke setup, this hub guarantees that your chain alignment remains dead-true from the green flag to the checkered. Upgrade your chassis today and experience the difference that true precision engineering makes on the stopwatch.\u003c\/p\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBillet Aluminum Construction:\u003c\/strong\u003e CNC-machined for zero runout and superior rotational balance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1 1\/4-Inch Axle Bore:\u003c\/strong\u003e Exacting tolerances ensure a secure, slip-free fit on standard racing axles.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBlack Anodized Finish:\u003c\/strong\u003e Enhances heat dissipation and protects against track debris and corrosion.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptimized Power Transfer:\u003c\/strong\u003e Reduces driveline flex to maximize output from your go kart engine.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRefined 2019 Design:\u003c\/strong\u003e Updated machining profiles eliminate common wear points and stress risers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRapid Gear Changes:\u003c\/strong\u003e Precision-tapped mounting holes allow for lightning-fast sprocket swaps.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUniversal Compatibility:\u003c\/strong\u003e Integrates seamlessly with standard split sprockets and driveline components.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How do I ensure this hub fits my kart?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e The APH125B is specifically engineered for standard 1 1\/4-inch racing axles. Ensure your axle diameter matches this specification before installation to guarantee a secure, slip-free fit.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Why is a billet aluminum hub better than a standard cast hub?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Billet aluminum offers superior rigidity and tighter machining tolerances. This prevents the hub from flexing under heavy acceleration, which reduces chain binding and ensures more efficient power transfer from your engine to the rear wheels.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How often should I inspect my sprocket hub?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e You should inspect your hub during every routine maintenance interval. Check for any signs of wear on the mounting holes and ensure the set screws or clamping hardware remain tight. The black anodized finish helps resist corrosion, but keeping the hub clean of track debris will extend its lifespan.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can I use this hub for both sprint and oval racing?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Yes, the APH125B is designed for all classes. Its robust construction handles the high-torque demands of both sprint and oval racing environments, providing consistent alignment for your driveline.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Does this hub come with mounting hardware for the sprocket?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e This product is the hub itself. It features precision-tapped holes designed for standard sprocket bolts, allowing for rapid gear changes in the pits.\u003c\/p\u003e\n\n\u003ch3\u003eRelated Products From Vendor\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/1-1-4-floating-sprocket-hub-black-pm-015-fs\"\u003eBlack 1 1\/4 Inch Floating Sprocket Hub PM-015-FS for Adjustable Kart Drive\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/pmi-sprocket-hub-1-25-pm-15\"\u003ePerformance Manufacturing PM-15 1.25\" Sprocket Hub - Black Anodized - All Classes\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/1-1-4-sprocket-hub-black-heavy-duty-aph125b-hd\"\u003ePerformance Manufacturing APH125B-HD Heavy Duty Sprocket Hub - 1 1\/4\" Bore Black - Senior Classes\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/pm-77a-light-weight-8-5-sprocket-guard-set-pm-77a\"\u003ePM-77A Lightweight 8.5 Inch Sprocket Guard Set for Kart Efficiency\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/carbon-fiber-spacer-kit-cfsk\"\u003eVersatile Carbon Fiber Spacer Kit for 1.25\" Kart Axles\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SwiftKarting","offers":[{"title":"Default Title","offer_id":48158018830595,"sku":"APH125B","price":46.8,"currency_code":"USD","in_stock":true}],"url":"https:\/\/phishstonesproducts.myshopify.com\/products\/performance-manufacturing-aph125b-1-1-4-sprocket-hub-black-billet-all-classes","provider":"PhishStones Products","version":"1.0","type":"link"}